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1. Achieving business and team building objectives through a single program

Author: Carol M. Panza and Randolph I. Jame
Subjects: Process management, Team building, Business
Published: 1991
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2. Identification of reference miRNAs in plasma useful for the study of oestrogen-responsive miRNAs associated with acquired Protein S deficiency in pregnancy

Author: J. W. Tay, I. James, Q. W. Hughes, J. Y. Tiao, and R. I. Baker
Subjects: Medicine, Biology (General), QH301-705.5, Science (General), Q1-390
Abstract: Abstract Background Accumulating evidence indicate that circulating microRNAs (miRNAs) are useful independent non-invasive biomarkers, with unique miRNA signatures defined for various pathophysiological conditions. However, there are no established universal housekeeping miRNAs for the normalisation of miRNAs in body fluids. We have previously identified an oestrogen-responsive miRNA, miR-494, in regulating the anticoagulant, Protein S, in HuH-7 liver cells. Moreover, increased thrombotic risk associated with elevated circulating oestrogen levels is frequently observed in pregnant women and oral contraceptive users. In order to identify other oestrogen-responsive miRNAs, including miR-494, that may be indicative of increased thrombotic risk in plasma, we used nanoString analysis to identify robust and stable endogenous reference miRNAs for the study of oestrogen-responsive miRNAs in plasma. Results We compared the plasma miRNA expression profile of individuals with: (1) Low circulating oestrogens (healthy men and non-pregnant women not taking oral contraceptives), (2) High circulating synthetic oestrogens, (women taking oral contraceptives) and (3) High circulating natural oestrogens (pregnant females >14 weeks gestation). From the nanoString analyses, 11 candidate reference miRNAs which exhibited high counts and not significantly differentially expressed between groups were selected for validation using realtime quantitative polymerase chain reaction (RT-qPCR) and digital droplet PCR (DDPCR) in pooled plasma samples, and the stability of their expression evaluated using NormFinder and BestKeeper algorithms. Four miRNAs (miR-25-5p, miR-188-5p, miR-222-3p and miR-520f) demonstrated detectable stable expression between groups and were further analysed by RT-qPCR in individual plasma samples, where miR-188-5p and miR-222-3p expression were identified as a stable pair of reference genes. The miRNA reference panel consisting of synthetic spike-ins cel-miR-39 and ath-miR159a, and reference miRNAs, miR-188-5p and miR-222-3p was useful in evaluating fold-change of the pregnancy-associated miRNA, miR-141-3p, between groups. Conclusion The miRNA reference panel will be useful for normalising qPCR data comparing miRNA expression between men and women, non-pregnant and pregnant females, and the potential effects of endogenous and synthetic oestrogens on plasma miRNA expression.
Published: 2017
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3. Gamma ray sources observation with the ARGO-YBJ detector

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, DE VINCENZI, Mario, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, MARI, Stefano Maria, B. Bartoli, BERNARDINI, Paolo, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alì Staiti, Danzengluobu, M. Dattoli, DE MITRI, Ivan, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. Jame, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, MANCARELLA, Giovanni, S. M. Mari, MARSELLA, GIOVANNI, MARTELLO, Daniele, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, PANAREO, Marco, B. Panico, PERRONE, Lorenzo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alì Staiti, M., Dattoli, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Nuclear and High Energy Physics, Gamma Astronomy, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Detector, Gamma ray, Flux, Astronomy, Extensive Air Shower, Astronomy and Astrophysics, Astrophysics, Gamma-ray astronomy, Array Detector, Gamma-Ray, Argo-Ybj, Gamma Astronomy, Array Detector, Crab Nebula, Air shower, Pulsar, Milagro, Blazar, Instrumentation, Argo
Abstract: In this paper we report on the observations of TeV gamma ray sources performed by the air shower de- tector ARGO-YBJ. The objects studied in this work are the blazar Markarian 421 and the extended galactic source MGROJ1908+06, monitored during 2 years of operation. Mrk421 has been detected by ARGO-YBJ with a statisti- cal significance of 11 standard deviations. The observed TeV emission was highly variable, showing large enhance- ments of the flux during active periods. The study of the spectral behaviour during flares revealed a positive correla- tion of the hardness with the flux, as already reported in the past by the Whipple telescope, suggesting that this is a long term property of the source. ARGO-YBJ observed a strong correlation between TeV gamma rays and the X-ray flux measured by RXTM/ASM and SWIFT/BAT during the whole period, with a time lag compatible with zero, supporting the one-zone SSC model to describe the emission mechanism. MGROJ1908+06 has been detected by ARGO-YBJ with 5 standard deviation of significance. From our data the source appears extended and the measured extension is ext=0.48 +0.26 0.28 , in agreement with a previous HESS obser- vation. The average flux is in marginal agreement with that reported by MILAGRO, but significantly higher than that ob- tained by HESS, suggesting a possible flux variability. The large field of view ( 2 sr) and the high duty cycle allow a continuous monitoring of the sky in the declination band from 0 to 70 . In this paper we report on the ob- servations of two bright gamma ray sources, performed dur- ing 2 years: the blazar Mrk421 and the extended galactic source MGROJ1908+06.
Published: 2012
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4. Long-term monitoring of mrk 501 for its very high energy γ emission and a flare in 2011 october

Author: B. Bartoli1, 2, P. Bernardini3, 4, X. J. Bi5, C. Bleve3, I. Bolognino6, 7, P. Branchini8, A. Budano8, A. K. Calabrese Melcarne9, P. Camarri10, Z. Cao5, R. Cardarelli11, S. Catalanotti1, C. Cattaneo7, S. Z. Chen5, T. L. Chen12, Y. Chen5, P. Creti4, S. W. Cui13, B. Z. Dai14, G. D’Al´ı Staiti15, 16, Danzengluobu12, M. Dattoli17, 18, 19, I. De Mitri3, B. D’Ettorre Piazzoli1, T. Di Girolamo1, X. H. Ding12, G. Di Sciascio11, C. F. Feng20, Zhaoyang Feng5, Zhenyong Feng21, F. Galeazzi8, E. Giroletti6, Q. B. Gou5, Y. Q. Guo5, H. H. He5, Haibing Hu12, Hongbo Hu5, Q. Huang21, M. Iacovacci1, R. Iuppa10, I. James8, H. Y. Jia21, Labaciren12, H. J. Li12, J. Y. Li20, X. X. Li5, G. Liguori6, C. Liu5, C. Q. Liu14, J. Liu14, M. Y. Liu12, H. Lu5, L. L. Ma5, X. H. Ma5, G. Mancarella3, 8, 22, G. Marsella3, D. Martello3, S. Mastroianni2, P. Montini8, C. C. Ning12, A. Pagliaro16, M. Panareo3, B. Panico10, L. Perrone3, P. Pistilli8, F. Ruggieri8, P. Salvini7, R. Santonico10, P. R. Shen5, X. D. Sheng5, F. Shi5, C. Stanescu8, A. Surdo4, Y. H. Tan5, P. Vallania17, S. Vernetto17, C. Vigorito18, B. Wang5, H. Wang5, C. Y. Wu5, H. R. Wu5, B. Xu21, L. Xue20, Q. Y. Yang14, X. C. Yang14, Z. G. Yao5, A. F. Yuan12, M. Zha5, H. M. Zhang5, Jilong Zhang5, Jianli Zhang5, L. Zhang14, P. Zhang14, X. Y. Zhang20, Y. Zhang5, J. Zhao5, Zhaxiciren12, Zhaxisangzhu12, X. X. Zhou21, F. R. Zhu21, Q. Q. Zhu5, G. Zizzi91 Dipartimento di Fisica dell’Universita` di Napoli 'Federico II, ' Complesso Universitario di Monte Sant’Angelo, via Cinthia, I. 80126 Napoli, Italy2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, Italy3 Dipartimento di Matematica e. Fisica '.E. De Giorgi' dell’Universita` del Salento, via per Arnesano, I. 73100 Lecce, Italy4 Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Italy5 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918, 100049 Beijing, China, c.h.e.n.s.z.@.i.h.e.p. a.c. cn6 Dipartimento di Fisica Nucleare e. Teorica dell’Universita` di Pavia, via Bassi 6, I. 27100 Pavia, Italy7 Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Italy8 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, via della Vasca Navale 84, I. 00146 Roma, Italy9 Istituto Nazionale di Fisica Nucleare–CNAF, Viale Berti Pichat 6/2, I. 40127 Bologna, Italy10 Dipartimento di Fisica dell’Universita` di Roma 'Tor Vergata, ' via della Ricerca Scientifica 1, I. 00133 Roma, Italy11 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, Italy12 Tibet University, 850000 Lhasa, Xizang, China13 Hebei Normal University, Shijiazhuang 050016, Hebei, China14 Yunnan University, 2 North Cuihu R.d., 650091 Kunming, Yunnan, China15 Dipartimento di Fisica e. Tecnologie Relative, Universita` degli Studi di Palermo, Viale delle Scienze, Edificio 18, I. 90128 Palermo, Italy16 Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Viale A. Doria 6, I. 95125 Catania, Italy17 Osservatorio Astrofisico di Torino, Istituto Nazionale di Astrofisica, corso Fiume 4, I. 10133 Torino, Italy18 Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via P. Giuria 1, I. 10125 Torino, Italy19 Dipartimento di Fisica Generale dell’Universita` di Torino, Italy20 Shandong University, 250100 Jinan, Shandong, China21 Southwest Jiaotong University, 610031 Chengdu, Sichuan, China22 Dipartimento di Fisica dell’Universita` 'Roma Tre, ' via della Vasca Navale 84, Italy23 Istituto di Astrofisica Spaziale e. Fisica Cosmica dell’Istituto Nazionale di Astrofisica, via La Malfa 153, I. 90146 Palermo, ItalyReceived 2012 March 8, accepted 2012 July 27, published 2012 September 18, MARI, Stefano Maria, B. Bartoli, BERNARDINI, Paolo, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Al´ı Staiti, Danzengluobu, M. Dattoli, DE MITRI, Ivan, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. Jame, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, L. L. Ma, X. H. Ma, MANCARELLA, Giovanni, S. M. Mari, MARSELLA, GIOVANNI, MARTELLO, Daniele, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, PANAREO, Marco, B. Panico, PERRONE, Lorenzo, P. Pistilli, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, Jilong Zhang, Jianli Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, J. Zhao, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, Bartoli, Bruno, Bernardini, P., X. J., Bi, Bleve, C., Bolognino, I., Branchini, P., Budano, A., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., D'Al? Staiti, G., Dattoli, M., De Mitri, I., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Ding, X. H., Di Sciascio, G., Feng, C. F., Zhaoyang, Feng, Zhenyong, Feng, Galeazzi, F., Giroletti, E., Gou, Q. B., Guo, Y. Q., H. H., He, Haibing, Hu, Hongbo, Hu, Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., H. J., Li, J. Y., Li, X. X., Li, Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., L. L., Ma, X. H., Ma, Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., C. Y., Wu, H. R., Wu, Xu, B., Xue, L., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Jilong, Zhang, Jianli, Zhang, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhao, J., Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, and G., B., Bartoli, Bernardini, Paolo, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Al´ı Staiti, M., Dattoli, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, F., Galeazzi, E., Giroletti, Q. B., Gou, Y. Q., Guo, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, B., Xu, L., Xue, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, J., Zhao, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, B., Bartoli1, P., Bernardini3, X. J., Bi5, C., Bleve3, I., Bolognino6, P., Branchini8, A., Budano8, A. K., Calabrese Melcarne9, P., Camarri10, Z., Cao5, R., Cardarelli11, S., Catalanotti1, C., Cattaneo7, S. Z., Chen5, T. L., Chen12, Y., Chen5, P., Creti4, S. W., Cui13, B. Z., Dai14, G., D’Al´ı Staiti15, 16, Danzengluobu12, M., Dattoli17, 18, 19, I., De Mitri3, B., D’Ettorre Piazzoli1, T., Di Girolamo1, X. H., Ding12, G., Di Sciascio11, C. F., Feng20, Zhaoyang, Feng5, Zhenyong, Feng21, F., Galeazzi8, E., Giroletti6, Q. B., Gou5, Y. Q., Guo5, H. H., He5, Haibing, Hu12, Hongbo, Hu5, Q., Huang21, M., Iacovacci1, R., Iuppa10, I., James8, H. Y., Jia21, Labaciren12, H. J., Li12, J. Y., Li20, X. X., Li5, G., Liguori6, C., Liu5, C. Q., Liu14, J., Liu14, M. Y., Liu12, H., Lu5, L. L., Ma5, X. H., Ma5, G., Mancarella3, Mari, Stefano Maria, 8, 22, G., Marsella3, D., Martello3, S., Mastroianni2, Montini8, P., C. C., Ning12, A., Pagliaro16, M., Panareo3, B., Panico10, L., Perrone3, P., Pistilli8, Ruggieri8, F., P., Salvini7, R., Santonico10, P. R., Shen5, X. D., Sheng5, F., Shi5, C., Stanescu8, A., Surdo4, Y. H., Tan5, P., Vallania17, S., Vernetto17, C., Vigorito18, B., Wang5, H., Wang5, C. Y., Wu5, H. R., Wu5, B., Xu21, L., Xue20, Q. Y., Yang14, X. C., Yang14, Z. G., Yao5, A. F., Yuan12, M., Zha5, H. M., Zhang5, Jilong, Zhang5, Jianli, Zhang5, L., Zhang14, P., Zhang14, X. Y., Zhang20, Y., Zhang5, J., Zhao5, Zhaxiciren12, Zhaxisangzhu12, X. X., Zhou21, F. R., Zhu21, Q. Q., Zhu5, G., Zizzi91 Dipartimento di Fisica dell’Universita` di Napoli 'Federico II, ' Complesso Universitario di Monte, Sant’Angelo, Via, Cinthia, I., 80126 Napoli, Italy2 Istituto Nazionale di Fisica, Nucleare, Sezione di, Napoli, Complesso Universitario di Monte, Sant’Angelo, De Giorgi' dell’Universita` del Salento, Italy3 Dipartimento di Matematica e. Fisica '. E., via per, Arnesano, I., 73100 Lecce, Italy4 Istituto Nazionale di Fisica, Nucleare, Sezione di, Lecce, Italy5 Key Laboratory of Particle, Astrophysic, Institute of High Energy, Physic, Chinese Academy of, Science, P. O., Box 918, 100049, Beijing, China, Teorica dell’Universita` di Pavia, c. h. e. n. s. z. @. i. h. e. p. a. c. cn6 Dipartimento di Fisica Nucleare e., via Bassi, 6, I., 27100 Pavia, Italy7 Istituto Nazionale di Fisica, Nucleare, Sezione di, Pavia, Italy8 Istituto Nazionale di Fisica, Nucleare, Sezione di Roma, Tre, via della Vasca Navale, 84, I., 00146 Roma, Italy9 Istituto Nazionale di Fisica, Nucleare–cnaf, Viale Berti Pichat, 6/2, I., 40127 Bologna, Italy10 Dipartimento di Fisica dell’Universita` di Roma 'Tor, Vergata, ' via della Ricerca Scientifica, 1, I., 00133 Roma, Italy11 Istituto Nazionale di Fisica, Nucleare, Sezione di Roma Tor, Vergata, via della Ricerca Scientifica, 1, Italy12 Tibet, University, 850000, Lhasa, Xizang, China13 Hebei Normal, University, Shijiazhuang, 050016, Hebei, China14 Yunnan, University, 2 North Cuihu, R. d., 650091, Kunming, Yunnan, China15 Dipartimento di Fisica e., Tecnologie Relative, Universita` degli Studi di, Palermo, Viale delle, Scienze, Edificio, 18, I., 90128 Palermo, Italy16 Istituto Nazionale di Fisica, Nucleare, Sezione di, Catania, Viale A., Doria 6, I., 95125 Catania, Italy17 Osservatorio Astrofisico di, Torino, Istituto Nazionale di, Astrofisica, corso Fiume, 4, I., 10133 Torino, Italy18 Istituto Nazionale di Fisica, Nucleare, Sezione di, Torino, via P., Giuria 1, I., 10125 Torino, Italy19 Dipartimento di Fisica Generale dell’Universita` di, Torino, Italy20 Shandong, University, 250100, Jinan, Shandong, China21 Southwest Jiaotong, University, 610031, Chengdu, Sichuan, China22 Dipartimento di Fisica dell’Universita` 'Roma, Tre, ' via della Vasca Navale, 84, Italy23 Istituto di Astrofisica Spaziale e., Fisica Cosmica dell’Istituto Nazionale di Astrofisica, via La Malfa, 153, I., 90146 Palermo, ItalyReceived 2012 March, 8, accepted 2012 July, 27, and published 2012 September, 18
Subjects: Active galactic nucleus, active" ["galaxies], Astrophysics::High Energy Astrophysical Phenomena, Flux, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, 01 natural sciences, Spectral line, law.invention, law, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, Physics, individual (Markarian 501) – galaxies: active – gamma rays: general – radiation mechanisms: non-thermal [BL Lacertae objects], " "general" ["gamma rays], 010308 nuclear & particles physics, BL Lacertae objects: individual (Markarian 501) – galaxies: active – gamma rays: general – radiation mechanisms: non-thermal, Settore FIS/01 - Fisica Sperimentale, Astronomy and Astrophysics, Quasar, Galaxy, individual (Markarian 501)" ["BL Lacertae objects], 13. Climate action, Space and Planetary Science, Spectral energy distribution, Flare
Abstract: "As one of the brightest active blazars in both X-ray and very high energy γ -ray bands, Mrk 501, is very useful for" "physics associated with jets from active galactic nuclei. The ARGO-YBJ experiment has monitored Mrk 501 for γ - rays above 0.3 TeV since 2007 November. The largest flare since 2005 was observed from 2011 October and lasted until about 2012 April. In this paper, a detailed analysis of this event is reported. During the brightest γ -ray flaring episodes from 2011 October 17 to November 22, an excess of the event rate over 6σ is detected by ARGO-YBJ in the direction of Mrk 501, corresponding to an increase of the γ -ray flux above 1 TeV by a factor of 6.6 ± 2.2 from its steady emission. In particular, the γ -ray flux above 8 TeV is detected with a significance better than 4σ . Based on time-dependent synchrotron self-Compton (SSC) processes, the broadband energy spectrum is interpreted as the emission from an electron energy distribution parameterized with a single power-law function with an exponential cutoff at its high-energy end. The average spectral energy distribution for the steady emission is well described by this simple one-zone SSC model. However, the detection of γ -rays above 8 TeV during the flare challenges this model due to the hardness of the spectra. Correlations between X-rays and γ -rays are also investigated."
Published: 2012

5. Background radioactivity in the scaler mode technique of the Argo-YBJ detector

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, DE VINCENZI, Mario, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, MARI, Stefano Maria, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., B. Bartoli, BERNARDINI, Paolo, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Ali´ Staiti, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. Jame, H. Y. Jia, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, MANCARELLA, Giovanni, S. M. Mari, MARSELLA, GIOVANNI, MARTELLO, Daniele, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, PANAREO, Marco, B. Panico, PERRONE, Lorenzo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, and G. Zizzi
Subjects: Physics, Resistive touchscreen, Physics and Astronomy (miscellaneous), Atmospheric pressure, Settore FIS/01 - Fisica Sperimentale, Detector, Scaler Mode, Astronomy and Astrophysics, Cosmic ray, Radioactivity, Array Detector, Scaler Mode, Array Detector, Coincidence, Computational physics, Radioactivity, Air shower, Coincident, Argo
Abstract: ""ARGO-YBJ is an extensive air shower detector located at the Yangbajing Cosmic Ray Laboratory (4300 ma.s.l., 606 g cm^−2 atmospheric depth, Tibet, China).. It is made by a single layer of Resistive Plate Chambers. (RPCs, total surface ~ 6700 m^2) grouped into 153 units. called “clusters”. The low energy threshold of the experiment is obtained using the ”scaler operation mode”, counting all the particles hitting the detector without reconstruction of the shower size and arrival direction. For each cluster the signals generated by these particles are put in coincidence in a narrow time window (150 ns) and read by four independent. scaler channels, giving the counting rates of channel. >= 1, >= 2, >= 3 and >= 4 hits. The study of these counting. rates pointed out a different behavior of channel >= 1. respect to the higher multiplicity channels: while the MC simulations can account fairly well for the coincident counting. rates, the expectation for channel >= 1 is sensibly less. than the measured value. Moreover, the regression coefficient with the atmospheric pressure for channel >= 1 is also. about half of the value measured for the coincident counting rates: seemingly half of these counts did not cross the atmosphere. Measurements of the natural radioactivity background. in the air of the detector hall and a MC simulation to. estimate its contribution on our counting rates are presented and discussed.""
Published: 2011

6. The ARGO-YBJ Experiment Progresses and Future Extension

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, DE VINCENZI, Mario, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, MARI, Stefano Maria, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, B. Bartoli, BERNARDINI, Paolo, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Ali´ Staiti, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. Jame, H. Y. Jia, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, MANCARELLA, Giovanni, S. M. Mari, MARSELLA, GIOVANNI, MARTELLO, Daniele, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, PANAREO, Marco, B. Panico, PERRONE, Lorenzo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Photon, Gamma ray source, cosmic ray origin, detector array, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Population, Detector array, FOS: Physical sciences, Cosmic ray, Astrophysics, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), detector array, Ultra-high-energy cosmic ray, education, Mathematical Physics, media_common, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, education.field_of_study, Detector, Gamma ray source, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy and Astrophysics, cosmic ray origin, Cosmic ray origin, Air shower, Space and Planetary Science, Sky, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Gamma ray source detection above 30 TeV is an encouraging approach for finding galactic cosmic ray origins. All sky survey for gamma ray sources using wide field of view detector is essential for population accumulation for various types of sources above 100 GeV. To target the goals, the ARGO-YBJ experiment has been established. Significant progresses have been made in the experiment. A large air shower detector array in an area of 1 km2 is proposed to boost the sensitivity. Hybrid detections with multi-techniques will allow a good discrimination between different types of primary particles, including photons and protons, thus enable an energy spectrum measurement for individual species. Fluorescence light detector array will extend the spectrum measurement to 100 PeV and higher where the second knee is located. An energy scale determined by balloon experiments at 10 TeV will be propagated to ultra high energy cosmic ray experiments.
Published: 2010

7. Cosmic ray physics with the ARGO-YBJ experiment

Author: B. Bartoli, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alì Staiti, Danzengluobu, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, B. Panico, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alì Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Astroparticle physics, Physics, Physics and Astronomy (miscellaneous), Proton, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Cosmic ray, Cosmic Rays, Array Detector, Astrophysics, Air shower, Observatory, Gamma-ray burst, Heliosphere
Abstract: The main scientific goals of the ARGO-YBJ ex- periment are -ray astronomy with a few hundreds GeV en- ergy threshold and cosmic ray physics below and around the knee of the primary energy spectrum (10 12 10 16 eV), where the transition from direct to indirect measurement techniques takes place. The ARGO-YBJ experiment, located at the Cos- mic Ray Observatory of Yangbajing (Tibet, P.R. of China, 4 300 m a.s.l.), is an unconventional Extensive Air Shower ar- ray of about 6,700 m 2 of active area, the only one exploiting the full-coverage technique at very high altitude currently in operation. The detector space-time granularity, performance and location offer a unique chance to make a detailed study of the structure of cosmic ray showers, in particular of the hadronic component. In this work we will focus on the main experimental results concerning cosmic ray and hadronic in- teraction physics: primary cosmic ray energy spectrum, an- tiproton over proton ratio, anisotropy in the cosmic ray flux and proton-air cross-section. Moreover, the possible data analysis improvements based on the use of all detailed infor- mation on the shower front (curvature, time width, rise time, ..), as well as the extension of the investigable energy range, allowed by the analog RPC readout, will be pointed out. nique at very high altitude presently in data taking. Location and detector features make ARGO-YBJ capable of investi- gating a wide range of fundamental issues in Cosmic Ray and Astroparticle Physics at relatively low energy threshold: - very high energy -ray astronomy, with an energy thresh- old of a few hundreds GeV; - search for emission of gamma ray bursts in the full GeV - TeV energy range; - study of cosmic rays (spectrum, composition, p/p ra- tio measurement, shower space-time structure, ...) starting at TeV energies; - Sun and heliosphere physics above Eth 1 GeV. In following sections, after a brief description of the detec- tor and its performance, the main results achieved on several items of cosmic ray physics will be presented and discussed.
Published: 2011
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8. The ARGO-YBJ contribution to the cosmic ray physics

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, DE VINCENZI, Mario, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, MARI, Stefano Maria, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Iacovacci, M., Bartoli, B., Catalanotti, S., Di Girolamo, T., D'Ettorre Piazzoli, B., and Mastroianni, S.
Subjects: Physics, Nuclear and High Energy Physics, Large field of view, media_common.quotation_subject, Detector, Astronomy, Extensive Air Shower, Cosmic ray, Extended Air Showers, Astrophysics, Effects of high altitude on humans, Cosmic Ray, Declination, Atomic and Molecular Physics, and Optics, Argo-Ybj, Duty cycle, Sky, Detector Array, RPC, Argo, media_common
Abstract: ""The ARGO-YBJ experiment is in stable data taking since November 2007 at the YangBaJing Cosmic Ray. Laboratory (Tibet, P.R.China, 4300 m a.s.l.). It exploits a full coverage and high altitude approach to the. small air showers detection. The detector is made of a single layer of RPCs operated in streamer mode, fully. instrumenting a central carpet of about 5700 m2, then a guard ring extends the partially instrumented area to. about 11,000 m2. The large field of view (∼ 2 sr) and the high duty cycle (≥ 85%) allow a continuous monitoring. of the sky in the declination band from -10. ◦. to 70. ◦. ; the detector operates with an energy threshold of a few. hundred GeV. Recent achieved results will be reported""
Published: 2011
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9. Measurement of the antiproton/proton ratio at TeV energies with the ARGO-YBJ detector

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, DE VINCENZI, Mario, MARI, Stefano Maria, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Physics, Nuclear and High Energy Physics, Antiparticle, PAMELA detector, Proton, Astrophysics::High Energy Astrophysical Phenomena, Extensive air shower, Dark matter, Antiproton/proton ratio measurement, Astronomy, Cosmic ray, Astrophysics, Physics::Geophysics, law.invention, Earth's magnetic field, law, Antiproton, Physics::Space Physics, Shadow, Cosmic rays, Extensive air shower, Antiproton/proton ratio measurement, TeV dark matter, TeV dark matter, Astrophysics::Earth and Planetary Astrophysics, Instrumentation
Abstract: Cosmic ray antiprotons provide an important probe for the study of cosmic-ray propagation in the interstellar space and to investigate the existence of Galactic dark matter. Cosmic rays are hampered by the Moon, therefore a deficit of cosmic rays in its direction is expected (the so-called Moon shadow). The Earth–Moon system acts as a magnetic spectrometer. In fact, due to the geomagnetic field the center of the Moon shifts westward by an amount depending on the primary cosmic ray energy. Paths of primary antiprotons are therefore deflected in an opposite sense in their way to the Earth. This effect allows, in principle, the search of antiparticles in the opposite direction of the observed Moon shadow. The ARGO-YBJ experiment, in stable data taking since November 2007 with an energy threshold of a few 100s of GeV, is observing the Moon shadow with high statistical significance. Using about 1 year data, an upper limit of the p ¯ / p flux ratio in the few-TeV energy region is set to a few percent with a confidence level of 90%.
Published: 2011
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10. The ARGO-YBJ experiment in Tibet

Author: THE ARGO YBJ COLLABORATION G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, D'ALI' STAITI G, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, THE ARGO YBJ COLLABORATION G., Aielli a, B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g
Subjects: Physics, Nuclear and High Energy Physics, Gamma ray burst, Single cluster, Trigger rate, Detector, gamma ray bursts, gamma rays, cosmic rays, extended air showers, Astronomy, Sampling (statistics), Cosmic ray, Extended air showers, Cosmic rays, Gamma ray sources, Gamma ray bursts, Gamma ray sources, Geodesy, Guard ring, Extended air shower, Sampling density, Instrumentation, Argo
Abstract: The setting up of the ARGO detector at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China) has been completed during the last spring (2007). It consists of a central carpet made of 130 identical sub-units of 12 RPCs each (a "cluster"), covering a surface of about 5800 m2 with 93% active area, and a guard ring of 24 further clusters of the same type surrounding the central carpet with a lower sampling density. Signals are picked up by external electrodes of small size, thus allowing the sampling of EAS with high space-time granularity. Shower events are detected at a trigger rate of about 4 kHz. Events with a few particles detected by a single cluster are counted in scaler mode on a time base of 500 ms. The intrinsic modularity of the ARGO detector allowed us to collect data even during the setting-up period, using only the central carpet (or even part of it). Some preliminary results from the analysis of events collected in a few months of data taking are presented. © 2008 Elsevier B.V. All rights reserved.
Published: 2008
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11. Preliminary results of the Moon shadow using ARGO-YBJ detector

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Physics, Nuclear and High Energy Physics, Detector, Moon shadow, Astronomy, Cosmic ray, Full coverage, Resistive Plate Chamber, Atomic and Molecular Physics, and Optics, Argo-Ybj, Air shower, Extended air shower, Shadow, Angular resolution, Argo
Abstract: ARGO-YBJ is a “full coverage” air shower detector consisting of Resistive Plate Chambers(RPCs) at the Yangbajing High Altitude Cosmic Ray Laboratory (Tibet, China) at 4300 m a.s.l. (lat=30.11° N, long=90.53° E). Using the data collected with a carpet of RPCs (1900 m 2 , about 1/3 of the whole ARGO-YBJ detector), the cosmic ray shadowing effect due to the Moon was studied. The 50% angular resolution is found to be ∼1.2° with the Chess-board method and the Moon shadow with a significance of 4.9 σ is found displaced by 0.7° westward and 0.5° northward with respect to the expected position by the equi-zenith angle Method.
Published: 2008
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12. OBSERVATION OF THE TeV GAMMA-RAY SOURCE MGRO J1908+06 WITH ARGO-YBJ

Author: B. Bartoli1, 2, P. Bernardini3, 4, X. J. Bi5, C. Bleve3, I. Bolognino6, 7, P. Branchini8, A. Budano8, A. K. Calabrese Melcarne9, P. Camarri10, Z. Cao5, R. Cardarelli11, S. Catalanotti1, C. Cattaneo7, S. Z. Chen5, T. L. Chen12, Y. Chen5, P. Creti4, S. W. Cui13, B. Z. Dai14, G. D’Al´ı Staiti15, 16, Danzengluobu12, M. Dattoli17, 18, 19, I. De Mitri3, B. D’Ettorre Piazzoli1, T. Di Girolamo1, X. H. Ding12, G. Di Sciascio11, C. F. Feng20, Zhaoyang Feng5, Zhenyong Feng21, F. Galeazzi8, E. Giroletti6, Q. B. Gou5, Y. Q. Guo5, H. H. He5, Haibing Hu12, Hongbo Hu5, Q. Huang21, M. Iacovacci1, R. Iuppa10, I. James8, H. Y. Jia21, Labaciren12, H. J. Li12, J. Y. Li20, X. X. Li5, G. Liguori6, C. Liu5, C. Q. Liu14, J. Liu14, M. Y. Liu12, H. Lu5, X. H. Ma5, G. Mancarella3, 8, 22, G. Marsella4, D. Martello3, S. Mastroianni2, P. Montini8, C. C. Ning12, A. Pagliaro16, M. Panareo4, B. Panico10, L. Perrone4, P. Pistilli8, X. B. Qu20, F. Ruggieri8, P. Salvini7, R. Santonico10, P. R. Shen5, X. D. Sheng5, F. Shi5, C. Stanescu8, A. Surdo4, Y. H. Tan5, P. Vallania17, S. Vernetto17, C. Vigorito18, B. Wang5, H. Wang5, C. Y. Wu5, H. R. Wu5, B. Xu21, L. Xue20, Y. X. Yan14, Q. Y. Yang14, X. C. Yang14, Z. G. Yao5, A. F. Yuan12, M. Zha5, H. M. Zhang5, Jilong Zhang5, Jianli Zhang5, L. Zhang14, P. Zhang14, X. Y. Zhang20, Y. Zhang5, Zhaxiciren12, Zhaxisangzhu12, X. X. Zhou21, F. R. Zhu21, Q. Q. Zhu5, G. Zizzi91 Dipartimento di Fisica dell’Universit`a di Napoli 'Federico II, ' Complesso Universitario di Monte Sant’Angelo, via Cinthia, 80126 Napoli, Italy2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, Italy3 Dipartimento di Matematica e. Fisica 'Ennio De Giorgi, ' Universit`a del Salento, via per Arnesano, 73100 Lecce, Italy4 Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Italy5 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918, 100049 Beijing, China6 Dipartimento di Fisica Nucleare e. Teorica dell’Universit`a di Pavia, via Bassi 6, 27100 Pavia, Italy7 Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Italy8 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, via della Vasca Navale 84, 00146 Roma, Italy9 Istituto Nazionale di Fisica Nucleare CNAF, Viale Berti Pichat 6/2, 40127 Bologna, Italy10 Dipartimento di Fisica dell’Universit`a di Roma 'Tor Vergata, ' via della Ricerca Scientifica 1, 00133 Roma, Italy11 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, Italy12 Tibet University, 850000 Lhasa, Xizang, China13 Hebei Normal University, Shijiazhuang 050016, Hebei, China14 Yunnan University, 2 North Cuihu R.d., 650091 Kunming, Yunnan, China15 Dipartimento di Fisica, Universit`a degli Studi di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy16 Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Viale A. Doria 6, 95125 Catania, Italy17 Osservatorio Astrofisico di Torino dell’Istituto Nazionale di Astrofisica, corso Fiume 4, 10133 Torino, Italy18 Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy19 Dipartimento di Fisica dell’Universit`a di Torino, Italy20 Shandong University, 250100 Jinan, Shandong, China21 Southwest Jiaotong University, 610031 Chengdu, Sichuan, China22 Dipartimento di Fisica dell’Universit`a 'Roma Tre, ' via della Vasca Navale 84, Italy23 Istituto di Astrofisica Spaziale e. Fisica Cosmica dell’Istituto Nazionale di Astrofisica, via La Malfa 153, 90146 Palermo, Italy, MARI, Stefano Maria, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, XB, Ruggieri, F, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, Bartoli, Bruno, Bernardini, P., X. J., Bi, Bleve, C., Bolognino, I., Branchini, P., Budano, A., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., D'Al? Staiti, G., Dattoli, M., De Mitri, I., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Ding, X. H., Di Sciascio, G., Feng, C. F., Zhaoyang, Feng, Zhenyong, Feng, Galeazzi, F., Giroletti, E., Gou, Q. B., Guo, Y. Q., H. H., He, Haibing, Hu, Hongbo, Hu, Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., H. J., Li, J. Y., Li, X. X., Li, Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., X. H., Ma, Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., X. B., Qu, Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., C. Y., Wu, H. R., Wu, Xu, B., Xue, L., Yan, Y. X., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Jilong, Zhang, Jianli, Zhang, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhaxiciren, Zhaxisangzhu, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., B., Bartoli1, P., Bernardini3, X. J., Bi5, C., Bleve3, I., Bolognino6, P., Branchini8, A., Budano8, A. K., Calabrese Melcarne9, P., Camarri10, Z., Cao5, R., Cardarelli11, S., Catalanotti1, C., Cattaneo7, S. Z., Chen5, T. L., Chen12, Y., Chen5, P., Creti4, S. W., Cui13, B. Z., Dai14, G., D’Al´ı Staiti15, 16, Danzengluobu12, M., Dattoli17, 18, 19, I., De Mitri3, B., D’Ettorre Piazzoli1, T., Di Girolamo1, X. H., Ding12, G., Di Sciascio11, C. F., Feng20, Zhaoyang, Feng5, Zhenyong, Feng21, F., Galeazzi8, E., Giroletti6, Q. B., Gou5, Y. Q., Guo5, H. H., He5, Haibing, Hu12, Hongbo, Hu5, Q., Huang21, M., Iacovacci1, R., Iuppa10, I., James8, H. Y., Jia21, Labaciren12, H. J., Li12, J. Y., Li20, X. X., Li5, G., Liguori6, C., Liu5, C. Q., Liu14, J., Liu14, M. Y., Liu12, H., Lu5, X. H., Ma5, G., Mancarella3, Mari, Stefano Maria, 8, 22, G., Marsella4, D., Martello3, S., Mastroianni2, Montini8, P., C. C., Ning12, A., Pagliaro16, M., Panareo4, B., Panico10, L., Perrone4, P., Pistilli8, X. B., Qu20, Ruggieri8, F., P., Salvini7, R., Santonico10, P. R., Shen5, X. D., Sheng5, F., Shi5, C., Stanescu8, A., Surdo4, Y. H., Tan5, P., Vallania17, S., Vernetto17, C., Vigorito18, B., Wang5, H., Wang5, C. Y., Wu5, H. R., Wu5, B., Xu21, L., Xue20, Y. X., Yan14, Q. Y., Yang14, X. C., Yang14, Z. G., Yao5, A. F., Yuan12, M., Zha5, H. M., Zhang5, Jilong, Zhang5, Jianli, Zhang5, L., Zhang14, P., Zhang14, X. Y., Zhang20, Y., Zhang5, Zhaxiciren12, Zhaxisangzhu12, X. X., Zhou21, F. R., Zhu21, Q. Q., Zhu5, G., Zizzi91 Dipartimento di Fisica dell’Universit`a di Napoli 'Federico II, ' Complesso Universitario di Monte, Sant’Angelo, Via, Cinthia, 80126, Napoli, Italy2 Istituto Nazionale di Fisica, Nucleare, Sezione di, Napoli, Complesso Universitario di Monte, Sant’Angelo, Italy3 Dipartimento di Matematica e., Fisica 'Ennio De Giorgi, ' Universit`a del, Salento, via per, Arnesano, 73100, Lecce, Italy4 Istituto Nazionale di Fisica, Nucleare, Sezione di, Lecce, Italy5 Key Laboratory of Particle, Astrophysic, Institute of High Energy, Physic, Chinese Academy of, Science, P. O., Box 918, 100049, Beijing, China6 Dipartimento di Fisica Nucleare e., Teorica dell’Universit`a di Pavia, via Bassi, 6, 27100, Pavia, Italy7 Istituto Nazionale di Fisica, Nucleare, Sezione di, Pavia, Italy8 Istituto Nazionale di Fisica, Nucleare, Sezione di Roma, Tre, via della Vasca Navale, 84, 00146, Roma, Italy9 Istituto Nazionale di Fisica Nucleare, Cnaf, Viale Berti Pichat, 6/2, 40127, Bologna, Italy10 Dipartimento di Fisica dell’Universit`a di Roma 'Tor, Vergata, ' via della Ricerca Scientifica, 1, 00133, Roma, Italy11 Istituto Nazionale di Fisica, Nucleare, Sezione di Roma Tor, Vergata, via della Ricerca Scientifica, 1, Italy12 Tibet, University, 850000, Lhasa, Xizang, China13 Hebei Normal, University, Shijiazhuang, 050016, Hebei, China14 Yunnan, University, 2 North Cuihu, R. d., 650091, Kunming, Yunnan, China15 Dipartimento di, Fisica, Universit`a degli Studi di, Palermo, Viale delle, Scienze, Edificio, 18, 90128, Palermo, Italy16 Istituto Nazionale di Fisica, Nucleare, Sezione di, Catania, Viale A., Doria 6, 95125, Catania, Italy17 Osservatorio Astrofisico di Torino dell’Istituto Nazionale di, Astrofisica, corso Fiume, 4, 10133, Torino, Italy18 Istituto Nazionale di Fisica, Nucleare, Sezione di, Torino, via P., Giuria 1, 10125, Torino, Italy19 Dipartimento di Fisica dell’Universit`a di, Torino, Italy20 Shandong, University, 250100, Jinan, Shandong, China21 Southwest Jiaotong, University, 610031, Chengdu, Sichuan, China22 Dipartimento di Fisica dell’Universit`a 'Roma, Tre, ' via della Vasca Navale, 84, Italy23 Istituto di Astrofisica Spaziale e., Fisica Cosmica dell’Istituto Nazionale di Astrofisica, via La Malfa, 153, 90146, Palermo, Italy, B., Bartoli, Bernardini, Paolo, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alì Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, F., Galeazzi, E., Giroletti, Q. B., Gou, Y. Q., Guo, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Astrophysics, general – pulsars: individual (MGRO J1908+06) [gamma rays], 7. Clean energy, 01 natural sciences, Pulsar wind nebula, Luminosity, Settore FIS/05 - Astronomia E Astrofisica, Pulsar, 0103 physical sciences, 010303 astronomy & astrophysics, pulsar, Physics, 010308 nuclear & particles physics, gamma rays: general – pulsars: individual (MGRO J1908+06), Settore FIS/01 - Fisica Sperimentale, Gamma ray, Astronomy and Astrophysics, (MGRO J1908+06), Air shower, Crab Nebula, 13. Climate action, Space and Planetary Science, gamma ray, Milagro, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract: The extended gamma ray source MGRO J1908+06, discovered by the Milagro air shower detector in 2007, has been observed for about 4 years by the ARGO-YBJ experiment at TeV energies, with a statistical significance of 6.2 standard deviations. The peak of the signal is found at a position consistent with the pulsar PSR J1907+0602. Parametrizing the source shape with a two-dimensional Gauss function we estimate an extension \sigma = 0.49 \pm 0.22 degrees, consistent with a previous measurement by the Cherenkov Array H.E.S.S.. The observed energy spectrum is dN/dE = 6.1 \pm 1.4 \times 10^-13 (E/4 TeV)^{-2.54 \pm 0.36} photons cm^-2 s^-1 TeV^-1, in the energy range 1-20 TeV. The measured gamma ray flux is consistent with the results of the Milagro detector, but is 2-3 times larger than the flux previously derived by H.E.S.S. at energies of a few TeV. The continuity of the Milagro and ARGO-YBJ observations and the stable excess rate observed by ARGO-YBJ along 4 years of data taking support the identification of MGRO J1908+06 as the steady powerful TeV pulsar wind nebula of PSR J1907+0602, with an integrated luminosity above 1 TeV about 1.8 times the Crab Nebula luminosity., Comment: 6 pages, accepted for pubblication by ApJ. Replaced to correct the author list
Published: 2012

13. Observation of TeV gamma rays from the Cygnus region with the ARGO-YBJ experiment

Author: Carla Bleve, Q. Q. Zhu, B. S. Wang, Zhaxisangzhu, Hongbo Hu, C. F. Feng, B. Bartoli, Carlo Vigorito, S. M. Mari, A. F. Yuan, X. D. Sheng, Zhengguo Cao, Paolo Montini, T. Di Girolamo, G. Liguori, B. D'Ettorre Piazzoli, R. Iuppa, L. L. Ma, Haibing Hu, Jilong Zhang, Y. Q. Guo, E. Giroletti, Y. B. Chen, H. J. Li, Chang-Chun Ning, Zhaoyang Feng, H. R. Wu, F. Ruggieri, Y. Zhang, P. Bernardini, S. W. Cui, D. Martello, B. Panico, Labaciren, Jianli Zhang, L. Xue, M. Iacovacci, M. Zha, M. Y. Liu, P. R. Shen, X. Y. Zhang, B. Z. Dai, J. K. K. Liu, Antonio Budano, P. Pistilli, H. M. Zhang, X. X. Zhou, C. Cattaneo, H. Y. Jia, X. H. Ding, Hong-peng Lu, Q. Y. Yang, Zhaxiciren, P. Creti, A. K. Calabrese Melcarne, P. F. Zhang, Cristian Stanescu, P. Branchini, A. Surdo, Roberto Cardarelli, Danzengluobu, G. Zizzi, Q. Huang, X. J. Bi, G. Marsella, Zhenyong Feng, F. R. Zhu, S. Vernetto, C. Liu, Bingwei Xu, X. X. Li, S. Catalanotti, Paolo Camarri, Z. G. Yao, H.H. He, M. Dattoli, M. Panareo, Huaguang Wang, Y. H. Tan, X. H. Ma, Q. B. Gou, I. De Mitri, J. B. Zhao, P. Salvini, Fudong Shi, A. Pagliaro, S. Mastroianni, J. Y. Li, T. L. Chen, I. Bolognino, S. Z. Chen, Giovanni Mancarella, G. Di Sciascio, X. C. Yang, R. Santonico, Irina James, L. Perrone, F. Galeazzi, Longzhou Zhang, C. Y. Wu, C. Q. Liu, G. D'Alí Staiti, P. Vallania, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D'Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D'Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, L. L., Ma, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, J., Zhao, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bartoli, Bruno, Bernardini, P., Bleve, C., Bolognino, I., Branchini, P., Budano, A., A. K. C., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., Staiti, G. D., Dattoli, M., Mitri, I. D., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Ding, X. H., Sciascio, G. D., Feng, C. F., Feng, Z. Y., Galeazzi, F., Giroletti, E., Gou, Q. B., Guo, Y. Q., H. B., Hu, Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Xu, B., Xue, L., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhao, J., Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali Staiti, G, Dattoli, M, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, LL, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Ruggieri, F, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, M. Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhao, J, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, Bartoli, B., Bi, X. J., Melcarne A. K., Calabrese, Catalanotti, S., Staiti G., D'Ali, De Mitri, I., Piazzoli B., D'Ettorre, Di Girolamo, T., Di Sciascio, G., Feng, Zhaoyang, Feng, Zhenyong, He, H. H., Hu, Haibing, Hu, Hongbo, Iacovacci, M., Li, H. J., Li, J. Y., Li, X. X., Ma, L. L., Ma, X. H., Mari, Stefano Maria, Wu, C. Y., Wu, H. R., Zhang, Jilong, and Zhang, Jianli
Subjects: Astrophysics::High Energy Astrophysical Phenomena, general – pulsars: individual (MGRO J2019+37 [Gamma rays], Flux, FOS: Physical sciences, Astrophysics, 01 natural sciences, Pulsar wind nebula, general – pulsar, 0103 physical sciences, MILAGRO, 010303 astronomy & astrophysics, DETECTOR, Argo, Physics, CALIBRATION, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, MGRO J2031+41), Settore FIS/01 - Fisica Sperimentale, Gamma ray, Astronomy and Astrophysics, individual (MGRO J2019+37, MGRO J2031+41), PLANE, 3. Good health, Medium energy, Crab Nebula, gamma ray, 13. Climate action, Space and Planetary Science, GALACTIC SOURCES, J2032+4130, Milagro, gamma rays, general – pulsars, EMISSION, Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report the observation of TeV gamma-rays from the Cygnus region using the ARGO-YBJ data collected from 2007 November to 2011 August. Several TeV sources are located in this region including the two bright extended MGRO J2019+37 and MGRO J2031+41. According to the Milagro data set, at 20 TeV MGRO J2019+37 is the most significant source apart from the Crab Nebula. No signal from MGRO J2019+37 is detected by the ARGO-YBJ experiment, and the derived flux upper limits at 90% confidence level for all the events above 600 GeV with medium energy of 3 TeV are lower than the Milagro flux, implying that the source might be variable and hard to be identified as a pulsar wind nebula. The only statistically significant (6.4 standard deviations) gamma-ray signal is found from MGRO J2031+41, with a flux consistent with the measurement by Milagro., 14 pages, 4 figures
Published: 2012

14. Measurement of the cosmic ray antiproton/proton flux ratio at TeV energies with the ARGO-YBJ detector

Author: X. X. Li, I. De Mitri, M. Iacovacci, M. Zha, G. D'Alí Staiti, Zhenyong Feng, P. Vallania, S. Vernetto, C. Cattaneo, F. R. Zhu, C. Liu, T. L. Chen, X. H. Ma, H.H. He, S. W. Cui, Jilong Zhang, F. Ruggieri, Q. Q. Zhu, P. Bernardini, S. Catalanotti, M. Panareo, Giovanni Mancarella, T. Di Girolamo, B. D'Ettorre Piazzoli, Y. Q. Guo, Carla Bleve, C. Y. Wu, E. Giroletti, B. Panico, P. Salvini, Zhaxiciren, R. Santonico, Zihuang Cao, Y. B. Chen, H. J. Li, Paolo Camarri, C. Q. Liu, H. R. Wu, Hongbo Hu, L. Xue, C. F. Feng, A. K. Calabrese Melcarne, A. F. Yuan, Carlo Vigorito, B. Z. Dai, Paolo Montini, R. Iuppa, B. Bartoli, Hong-peng Lu, X. Y. Zhang, X. C. Yang, G. Marsella, Haibing Hu, Cristian Stanescu, P. Branchini, Y. X. Yan, Antonio Budano, B. S. Wang, J. K. K. Liu, Zhaxisangzhu, Labaciren, Irina James, Y. Zhang, Chang-Chun Ning, Zhaoyang Feng, D. Martello, Longzhou Zhang, L. Perrone, Jianli Zhang, P. Creti, P. Pistilli, H. M. Zhang, X. X. Zhou, Z. G. Yao, Bingwei Xu, A. Surdo, Q. Huang, Huaguang Wang, G. Liguori, Fudong Shi, S. Mastroianni, Q. B. Gou, X. D. Sheng, P. R. Shen, P. F. Zhang, X. J. Bi, S. Z. Chen, S. M. Mari, X. B. Qu, X. H. Ding, Roberto Cardarelli, G. Di Sciascio, Y. H. Tan, J. Y. Li, M. Y. Liu, Q. Y. Yang, H. Y. Jia, Danzengluobu, G. Zizzi, I. Bolognino, A. Pagliaro, Bartoli, B., Bernardini, P., Bi, X. J., Bleve, C., Bolognino, I., Branchini, P., Budano, A., Melcarne A. K., Calabrese, Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, S., Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., Staiti G., D'Ali, Danzengluobu, De Mitri, I., Piazzoli B., D'Ettorre, Di Girolamo, T., Ding, X. H., Di Sciascio, G., Feng, C. F., Feng, Zhaoyang, Feng, Zhenyong, Giroletti, E., Gou, Q. B., Guo, Y. Q., He, H. H., Hu, Haibing, Hu, Hongbo, Huang, Q., Iacovacci, M., Iuppa, R., James, I., Jia, H. Y., Labaciren, Li, H. J., Li, J. Y., Li, X. X., Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., Ma, X. H., Mancarella, G., Mari, Stefano Maria, Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Qu, X. B., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Wu, C. Y., Wu, H. R., Xu, B., Xue, L., Yan, Y. X., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhaxiciren, Zhaxisangzhu, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., Bartoli, Bruno, Bi, X., Calabrese Melcarne, A., Catalanotti, Sergio, Chen, S., Chen, T., Cui, S., Dai, B., D’Alí Staiti, G., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Ding, X., Feng, C., Zhaoyang, Feng, Zhenyong, Feng, Gou, Q., Guo, Y., He, H., Haibing, Hu, Hongbo, Hu, Iacovacci, Michele, Jia, H., Li, H., Li, J., Li, X., Liu, M., Ma, X., Mari, S., Ning, C., Qu, X., Shen, P., Sheng, X., Tan, Y., Wu, C., Wu, H., Yan, Y., Yang, Q., Yang, X., Yao, Z., Yuan, A., Zhang, H., Jilong, Zhang, Jianli, Zhang, Zhang, X., Zhou, X., Zhu, F., Zhu, Q., Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali' Staiti, G, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HBa, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, XB, Ruggieri, F, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLo, Zhang, JLi, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alí Staiti, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Nuclear and High Energy Physics, Antiparticle, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Settore FIS/01 - Fisica Sperimentale, Earth-Moon, Cosmic ray, magnetic spectrometer, High Energy Physics - Experiment, Nuclear physics, Earth's magnetic field, Antiproton, Antimatter, antiproton, Content (measure theory), Antiproton-Proton ratio, Cosmic rays, Extended Air Showers, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract: Cosmic ray antiprotons provide an important probe to study the cosmic ray propagation in the interstellar space and to investigate the existence of dark matter. Acting the Earth-Moon system as a magnetic spectrometer, paths of primary antiprotons are deflected in the opposite sense with respect to those of the protons in their way to the Earth. This effect allows, in principle, the search for antiparticles in the direction opposite to the observed deficit of cosmic rays due to the Moon (the so-called `Moon shadow'). The ARGO-YBJ experiment, located at the Yangbajing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l., 606 g/cm$^2$), is particularly effective in measuring the cosmic ray antimatter content via the observation of the cosmic rays shadowing effect due to: (1) good angular resolution, pointing accuracy and long-term stability; (2) low energy threshold; (3) real sensitivity to the geomagnetic field. Based on all the data recorded during the period from July 2006 through November 2009 and on a full Monte Carlo simulation, we searched for the existence of the shadow cast by antiprotons in the TeV energy region. No evidence of the existence of antiprotons is found in this energy region. Upper limits to the $\bar{p}/p$ flux ratio are set to 5 % at a median energy of 1.4 TeV and 6 % at 5 TeV with a confidence level of 90%. In the TeV energy range these limits are the lowest available., Comment: Contact authors: G. Di Sciascio (disciascio@roma2.infn.it) and R. Iuppa (iuppa@roma2.infn.it), INFN Sezione di Roma Tor Vergata, Roma, Italy
Published: 2012

15. Light-component spectrum of the primary cosmic rays in the multi-TeV region measured by the ARGO-YBJ experiment

Author: X. C. Yang, B. Bartoli, Zhenyong Feng, B. Panico, C. Liu, P. R. Shen, Irina James, X. H. Ma, J. K. K. Liu, P. Salvini, G. D'Alí Staiti, P. Vallania, Q. Q. Zhu, P. Pistilli, H. M. Zhang, X. X. Zhou, Giovanni Mancarella, G. Di Sciascio, B. D'Ettorre Piazzoli, P. Creti, R. Santonico, X. X. Li, Y. B. Chen, H. J. Li, Carla Bleve, H. R. Wu, Hongbo Hu, H. Y. Jia, L. Xue, C. F. Feng, Bingwei Xu, C. Y. Wu, A. Surdo, L. Perrone, Hong-peng Lu, C. Q. Liu, Chang-Chun Ning, Zhaoyang Feng, Q. Huang, I. De Mitri, Q. B. Gou, X. Y. Zhang, T. Di Girolamo, Paolo Camarri, T. L. Chen, M. Iacovacci, B. Z. Dai, X. X. Yan, F. R. Zhu, P. F. Zhang, X. J. Bi, Y. Q. Guo, S. Catalanotti, S. W. Cui, S. Z. Chen, Jianli Zhang, P. Bernardini, F. Ruggieri, Cristian Stanescu, P. Branchini, M. Panareo, Zihuang Cao, A. F. Yuan, Carlo Vigorito, B. S. Wang, Longzhou Zhang, Zhaxisangzhu, Haibing Hu, E. Giroletti, Z. G. Yao, S. M. Mari, Antonio Budano, Y. Zhang, Labaciren, D. Martello, M. Zha, C. Cattaneo, A. K. Calabrese Melcarne, Paolo Montini, G. Marsella, R. Iuppa, S. Vernetto, Danzengluobu, X. D. Sheng, J. Y. Li, H.H. He, M. Dattoli, I. Bolognino, M. Y. Liu, Q. Y. Yang, G. Zizzi, X. B. Qu, X. H. Ding, Roberto Cardarelli, Y. H. Tan, A. Pagliaro, G. Liguori, Huaguang Wang, Fudong Shi, S. Mastroianni, Zhaxiciren, Jilong Zhang, Bartoli, B., Bernardini, P., Bi, X. J., Bleve, C., Bolognino, I., Branchini, P., Budano, A., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, S., Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., D'Ali Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., D'Ettorre Piazzoli, B., Di Girolamo, T., Ding, X. H., Di Sciascio, G., Feng, C. F., Feng, Z., Giroletti, E., Gou, Q. B., Guo, Y. Q., He, H. H., Hu, H., Huang, Q., Iacovacci, M., Iuppa, R., James, I., Jia, H. Y., Labaciren, Li, H. J., Li, J. Y., Li, X. X., Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., Ma, X. H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Qu, X. B., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Wu, C. Y., Wu, H. R., Xu, B., Xue, L., Yan, X. X., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, J., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhaxiciren, Zhaxisangzhu, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Melcarne, Akc, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, Sz, Chen, Tl, Chen, Y, Creti, P, Cui, Sw, Dai, Bz, Staiti, Gd, Dattoli, M, De Mitri, I, Piazzoli, Bd, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Giroletti, E, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liguori, G, Liu, C, Liu, Cq, Liu, J, Liu, My, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, Xb, Ruggieri, F, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Xx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Bartoli, Bruno, X. J., Bi, A. K. C., Catalanotti, Sergio, Staiti, G. D., Mitri, I. D., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Sciascio, G. D., Feng, Z. Y., H. H., He, H. B., Hu, Iacovacci, Michele, H. J., Li, J. Y., Li, X. X., Li, X. H., Ma, X. B., Qu, C. Y., Wu, H. R., Wu, Zhang, J. L., B., Bartoli, Bernardini, Paolo, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, E., Giroletti, Q. B., Gou, Y. Q., Guo, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, B., Xu, L., Xue, X. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bi, XJ, Calabrese Melcarne, AK, Chen, SZ, Chen, TL, Cui, SW, Dai, BZ, D'ALI'STAITI, G, D’Ettorre Piazzoli, B, Ding, XH, Feng, CF, Feng, ZYa, Feng, ZYo, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, James, J, Jia, HY, Li, HJ, Li, JY, Li, XX, Liu, CQ, Liu, MY, Ma, XH, Mari, S, Ning, CC, Panareo, P, Qu, XB, Shen, PR, Sheng, XD, Tan, YH, Wu, CY, Wu, HR, Yan, XX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, XY, Zhou, XX, Zhu, FR, Zhu, QQ, and Zizzi, G
Subjects: Extended Air Showers, Cosmic Rays, Gamma Ray sources, Nuclear and High Energy Physics, Proton, TIBET, Astrophysics::High Energy Astrophysical Phenomena, Extensive air shower, chemistry.chemical_element, Cosmic ray, HELIUM SPECTRA, Astrophysics, PROTON, Bayesian method, CASCADES, Spectral line, Settore FIS/05 - Astronomia E Astrofisica, Nuclear magnetic resonance, Cosmic-ray observatory, Helium, Physics, Range (particle radiation), ENERGY-RANGE, BALLOON EXPERIMENT, NUCLEI, Settore FIS/01 - Fisica Sperimentale, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, light component spectrum, chemistry, Energy (signal processing), SYSTEM
Abstract: The ARGO-YBJ experiment detects extensive air showers in a wide energy range by means of a full-coverage detector which is in stable data taking in its full configuration since November 2007 at the YBJ International Cosmic Ray Observatory (4300 m a.s.l., Tibet, People's Republic of China). In this paper the measurement of the light-component spectrum of primary cosmic rays in the energy region $(5\textdiv{}200)\text{ }\text{ }\mathrm{TeV}$ is reported. The method exploited to analyze the experimental data is based on a Bayesian procedure. The measured intensities of the light component are consistent with the recent CREAM results and higher than that obtained adding the proton and helium spectra reported by the RUNJOB experiment.
Published: 2012

16. Calibration of the RPC charge readout in the ARGO-YBJ experiment

Author: M. Iacovacci, M. Zha, Hongbo Hu, C. Liu, A. Surdo, Y. B. Chen, Q. Y. Yang, Yicheng Guo, Y. X. Yan, Danzengluobu, X. H. Ma, P. Creti, B. Liberti, A. F. Yuan, Huihai He, G. Zizzi, P. F. Zhang, Haifeng Li, Paolo Bernardini, R. Santonico, X. C. Yang, X. J. Bi, X. Y. Zhang, R. Gargana, Minghui Liu, S. Z. Chen, X. X. Li, Labaciren, L. Zhang, A. Pagliaro, C. Cattaneo, F. Shi, A. Cappa, Irina James, Piero Vallania, X. B. Qu, S. Catalanotti, X. H. Ding, B. S. Wang, Zhaxisangzhu, P. Salvini, L. Perrone, G. Di Sciascio, A. K. Calabrese Melcarne, Jilong Zhang, Y. H. Tan, M. De Vincenzi, R. Cardarelli, S. M. Mari, Cunfeng Feng, G. D'Alí Staiti, E. Rossi, N. Cheng, Jianli Zhang, Paolo Montini, R. Iuppa, H. Y. Jia, S. Vernetto, C. Bacci, P. Camarri, G. Mancarella, J. K. K. Liu, C. Y. Wu, L. Saggese, Zihuang Cao, I. De Mitri, T. L. Chen, H. M. Zhang, M. Dattoli, H. Lu, G. Liguori, C. X. Liu, F. Galeazzi, B. Bartoli, T. Di Girolamo, P. Celio, G. Aielli, B. D'Ettorre Piazzoli, Bingwei Xu, Severino Angelo Maria Bussino, P. R. Shen, L. Xue, Q. B. Gou, Carlo Vigorito, Xiangdong Sheng, P. Pistilli, X. X. Zhou, P. Galeotti, Q. Huang, Haibing Hu, C. Bleve, Y. Zhang, D. Martello, Zhenyong Feng, A. Budano, S. Mastroianni, H. R. Wu, H. W. Wang, B. Z. Dai, F. Ruggieri, F. R. Zhu, M. Panareo, Q. Q. Zhu, P. Branchini, G. Marsella, X. R. Meng, C. Stanescu, Chang-Chun Ning, Zhaoyang Feng, S. W. Cui, J. Y. Li, Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bi, XJ, Bussino, S, Calabrese Melcarne, AK, Chen, SZ, Chen, TL, Cui, SW, Dai, BZ, De Vincenzi, M, Ding, XH, Feng, CF, Feng, ZYa, Feng, ZYo, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Jia, HY, Li, HJ, Li, JY, Li, XX, Liu, CQ, Liu, MY, Ma, XH, Mari, SM, Meng, XR, Ning, CC, Qu XB, Shen, PR, Sheng, XD, Tan, YH, Wu, CY, Wu, HR, Yan, YX, Yang, QY, Yang, XC, Yuan, AF, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, XY, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Optical telescopes, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Camere a Piastre Resistive (RPC), Resistive plate chamber, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, law.invention, Telescope, Settore FIS/05 - Astronomia E Astrofisica, Optics, law, Coincident, Air showers, Calibration, Sea level, Instrumentation, Particle densities, Cosmic rays, Resistive Plate Chambers, Charge read-out, Extended Air Showers, Physics, Air showers, Charge readout, Dynamic range, Knee regions, Particle densities, Resistive plate chambers, Calibration, Charged particles, Cosmic rays, Experiments, Optical telescopes, Sea level, Telescopes, Particle spectrometers, Resistive touchscreen, Scintillation, Dynamic range, Charge readout, business.industry, Charged particles, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Charged particle, Air shower, Calibrazione della Risposta Analogica di RPC, Knee regions, Lettura Analogica di RPC, Resistive plate chambers, business, Experiments, Telescopes
Abstract: ""The charge readout of Resistive Plate Chambers (RPCs) is implemented in the ARGO-YBJ experiment to measure the charged particle density of the shower front up to 10^4\\\/m^2, enabling the study of the primary cosmic rays with energies in the ''knee'' region. As the first time for RPCs being used this way, a telescope with RPCs and scintillation detectors is setup to calibrate the number of charged particles hitting a RPC versus its charge readout. Air shower particles are taken as the calibration beam. The telescope was tested at sea level and then moved to the ARGO-YBJ site for coincident operation with the ARGO-YBJ experiment. The charge readout shows good linearity with the particle density in the dynamic range (up to 200\\\/m^2).""
Published: 2012

17. Gamma-Ray Astronomy with ARGO-YBJ

Author: B. Bartoli, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Ali´ Staiti, Danzengluobu, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, B. Panico, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: TeV gamma-ray flares – Gamma rays: observations – Galaxy: Crab Nebula [Galaxy]
Abstract: ARGO-YBJ is a full coverage air shower array located at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l., 606 g/cm2) recording data with a duty cycle 85% and an energy threshold of a few hundred GeV. In this paper the latest results in Gamma-Ray Astronomy are summarized.
Published: 2012

18. Gamma ray bursts monitoring with the ARGO-YBJ experiment in scaler mode

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, DE VINCENZI, Mario, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, MARI, Stefano Maria, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Di Girolamo, T., Vallania, P., Vigorito, C., Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Physics, Gamma Ray Astronomy, Gamma Astronomy, Array Detector, Extensive Air Shower, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Field of view, Gamma-ray astronomy, Astrophysics, Astronomy and Astrophysic, Coincidence, Argo-Ybj, Air shower, Gamma Ray Burst, Observatory, Satellite, Gamma-ray burst, Physics::Atmospheric and Oceanic Physics, Fermi Gamma-ray Space Telescope
Abstract: On behalf of the ARGO-YBJ Collaboration Abstract. We report on the search for Gamma Ray Bursts (GRBs) in the energy range 1 100 GeV in coincidence with the prompt emission detected by satellites, using the Astro- physical Radiation Ground-based Observatory at YangBa- Jing (ARGO-YBJ). With its big active surface ( 6700 m 2 ) and large field of view ( 2 sr) the ARGO-YBJ air shower detector is particularly suitable to detect unpredictable and short duration events such as GRBs. The search has been performed using the single particle technique in time coinci- dence with satellite detections both for single events and for the piling up of all the GRBs in time and in phase. Between November 2004 and June 2010 115 GRBs, de- tected by different satellites (mainly Swift and Fermi), oc- curred within the field of view of ARGO-YBJ. For 94 of these we searched for a counterpart in the ARGO-YBJ data finding no statistically significant emission. Search methods and results are discussed.
Published: 2011

19. Observation of the cosmic ray moon shadowing effect with the ARGO-YBJ experiment

Author: B. Bartoli, P. Bernardini, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alí Staiti, null Danzengluobu, M. Dattoli, I. De Mitri, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, null Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, G. Mancarella, S. M. Mari, G. Marsella, D. Martello, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, M. Panareo, B. Panico, L. Perrone, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, Jilong Zhang, Jianli Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, null Zhaxiciren, null Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Melcarne, Akc, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Creti, P, Cui, Sw, Dai, Bz, Staiti, Gd, Danzengluobu, Dattoli, M, De Mitri, I, Piazzoli, Bd, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Galeazzi, F, Giroletti, E, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liguori, G, Liu, C, Liu, Cq, Liu, J, Liu, My, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, D'Ali' Staiti, G, Bi, XJ, Calabrese Melcarne, AK, Chen, SZ, Chen, TL, Cui, SW, Dai, BZ, D’Alı Staiti, G, D’Ettorre Piazzoli, B, Ding, XH, Feng, CF, Feng, ZYa, Feng, ZYo, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, Jia, HY, Li, HJ, Li, JY, Li, XX, Liu, CQ, Liu, MY, Ma, XH, Mari, SM, Ning, CC, Qu, XB, Shen, PR, Sheng, XD, Tan, YH, Wu, CY, Wu, HR, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, XY, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, and Zizzi, G
Subjects: Point spread function, Nuclear and High Energy Physics, Cosmic Rays, Gamma Astronomy, Extended Air Showers, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Cosmic ray, Astrophysics, 01 natural sciences, Standard deviation, Physics::Geophysics, Raggi cosmici, Settore FIS/05 - Astronomia E Astrofisica, geomagnetic field, 0103 physical sciences, 010303 astronomy & astrophysics, Physics, 010308 nuclear & particles physics, Ombra della luna, Apparati di sciame, Detector, Settore FIS/01 - Fisica Sperimentale, Moon shadow, Astronomy, Magnetic field, Earth's magnetic field, Air shower, 13. Climate action, Physics::Space Physics
Abstract: Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called Moon shadow). The Moon shadow is an important tool to determine the performance of an air shower array. Indeed, the westward displacement of the shadow center, due to the bending effect of the geomagnetic field on the propagation of cosmic rays, allows the setting of the absolute rigidity scale of the primary particles inducing the showers recorded by the detector. In addition, the shape of the shadow permits to determine the detector point spread function, while the position of the deficit at high energies allows the evaluation of its absolute pointing accuracy. In this paper we present the observation of the cosmic ray Moon shadowing effect carried out by the ARGO-YBJ experiment in the multi-TeV energy region with high statistical significance (55 standard deviations). By means of an accurate Monte Carlo simulation of the cosmic rays propagation in the Earth-Moon system, we have studied separately the effect of the geomagnetic field and of the detector point spread function on the observed shadow. The angular resolution as a function of the particle multiplicity and the pointing accuracy have been obtained. The primary energy of detected showers has been estimated by measuring the westward displacement as a function of the particle multiplicity, thus calibrating the relation between shower size and cosmic ray energy. The stability of the detector on a monthly basis has been checked by monitoring the position and the deficit of the Moon shadow. Finally, we have studied with high statistical accuracy the shadowing effect in the day/’’night’’ time looking for possible effect induced by the solar wind.
Published: 2011

20. Measurement of the ¯p/p ratio in the few-TeV energy range with ARGO-YBJ

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, DE VINCENZI, Mario, MARI, Stefano Maria, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Moon shadow, Cosmic ray, Astrophysics, Cosmic Ray Antiproton, 01 natural sciences, Atomic and Molecular Physics, and Optics, Flux ratio, Argo-Ybj, Antiproton, Antimatter, 0103 physical sciences, antimatter, High Energy Physics::Experiment, 010306 general physics, Energy (signal processing), Argo
Abstract: Cosmic ray antiprotons provide an important probe for the study of cosmic ray propagation in the interstellar space and to investigate the existence of Galactic dark matter. The ARGO-YBJ experiment is observing the Moon shadow with high statistical significance at an energy threshold of a few hundred GeV. Using all the data collected until November 2009, we set two upper limits on the p ¯ / p flux ratio: 5% at an energy of 1.4 TeV and 6% at 5 TeV with a confidence level of 90%. In the few-TeV range the ARGO-YBJ results are the lowest available, useful to constrain models for antiproton production in antimatter domains.
Published: 2011

21. Long-term monitor of Mrk 421 TeV emission using ARGO-YBJ experiment

Author: B. Bartoli, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alı Staiti, Danzengluobu, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, B. Panico, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, Jilong Zhang, Jianli Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: gamma ray observations, Markarian 421, BL Lacertae object
Abstract: ARGO-YBJ is an air shower detector array with a fully covered layer of Resistive Plate Chambers. It is operated with a high duty cycle and a large field of view. It monitors continuously the northern sky at energies above 0.3 TeV. In this paper, we report a long-term monitoring of Mrk 421 over the period from November 2007 to February 2010. Meanwhile, this source was observed by the satellite-borne experiments RXTE and Swift in the X-ray band. Mrk 421 was very active especially in the first half of 2008. Many flares are observed in both X-ray and gamma-ray bands simultaneously. The gamma-ray flux observed by ARGO-YBJ has a clear correlation with the X-ray flux. No lag longer than 1 day between the X-ray and gamma-ray photons is found. The evolution of the spectral energy distribution is investigated by measuring indices at four different flux levels. Hardening of the spectra is observed in both X-ray and gamma-ray bands. The gamma-ray flux increases quadratically with the simultaneously measured X-ray flux. All these observational results strongly favor the synchrotron self-Compton process as the underlying radiative mechanism.
Published: 2011

22. Mean Interplanetary Magnetic Field Measurement Using the ARGO-YBJ Experiment

Author: X. X. Li, Zhenyong Feng, L. Zhang, B. D'Ettorre Piazzoli, L. Xue, G. Mancarella, Q. B. Gou, A. Cappa, M. Zha, F. R. Zhu, M. Panareo, B. Z. Dai, M. Iacovacci, Piero Vallania, P. Creti, Danzengluobu, F. Ruggieri, A. K. Calabrese Melcarne, L. Perrone, P. Salvini, R. Cardarelli, G. Marsella, Q. Q. Zhu, Y. Q. Guo, P. Branchini, H. Y. Jia, G. Aielli, R. Santonico, H. H. He, C. Bacci, S. M. Mari, Zhengguo Cao, X. C. Yang, B. S. Wang, A. Pagliaro, Q. Y. Yang, Bingwei Xu, P. F. Zhang, E. Giroletti, Severino Angelo Maria Bussino, S. W. Cui, Hongbo Hu, A. Surdo, C. F. Feng, X. J. Bi, H. R. Wu, I. De Mitri, X. R. Meng, C. Stanescu, Irina James, A. F. Yuan, Chang-Chun Ning, Zhaoyang Feng, J. Y. Li, Jilong Zhang, T. Di Girolamo, F. Shi, Jianli Zhang, T. L. Chen, H. M. Zhang, G. Di Sciascio, Carlo Vigorito, P. Celio, C. Y. Wu, M. Y. Liu, M. De Vincenzi, Haibing Hu, R. Gargana, I. Bolognino, B. Bartoli, H. J. Li, X. D. Sheng, C. Bleve, Y. B. Chen, S. Z. Chen, L. Saggese, Y. Zhang, B. Liberti, Paolo Bernardini, D. Martello, X. B. Qu, X. H. Ding, Labaciren, J. K. K. Liu, P. Pistilli, X. X. Zhou, G. D'Alí Staiti, Y. H. Tan, P. Galeotti, Q. Huang, X. Y. Zhang, C. Liu, X. H. Ma, G. Liguori, C. X. Liu, Zhaxisangzhu, S. Catalanotti, Z. G. Yao, Y. X. Yan, E. Rossi, M. Dattoli, H. Lu, Paolo Montini, R. Iuppa, and G. Zizzi, P. Camarri, H. W. Wang, S. Vernetto, F. Galeazzi, A. Budano, S. Mastroianni, C. Cattaneo, P. R. Shen, Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Bussino, S, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Gargana, R, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liberti, B, Liguori, G, Liu, C, Liu, CQ, Liu, MY, Liu, J, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Meng, XR, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu XB, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D'Alí Staiti, M., Dattoli, DE MITRI, Ivan, B., D'Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bi, Xj, Bussino, Severino Angelo Maria, Melcarne, Akc, Chen, Sz, Chen, Tl, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, DE VINCENZI, Mario, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Meng, Xr, Ning, Cc, Qu, Xb, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Yan, Yx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Solar System, Field (physics), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, magnetic field, Cosmic ray, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Settore FIS/05 - Astronomia E Astrofisica, Shadow, Astrophysics::Solar and Stellar Astrophysics, Interplanetary magnetic field, cosmic ray, Solar and Stellar Astrophysics (astro-ph.SR), media_common, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Cosmic Rays, Gamma Sources, Extended Air Showers, Solar wind, Magnetic field, Solar wind, Astrophysics - Solar and Stellar Astrophysics, solar wind, Space and Planetary Science, Sky, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The sun blocks cosmic ray particles from outside the solar system, forming a detectable shadow in the sky map of cosmic rays detected by the ARGO-YBJ experiment in Tibet. Because the cosmic ray particles are positive charged, the magnetic field between the sun and the earth deflects them from straight trajectories and results in a shift of the shadow from the true location of the sun. Here we show that the shift measures the intensity of the field which is transported by the solar wind from the sun to the earth., Comment: 6 papges,3 figures
Published: 2011
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23. Early warning for VHE gamma-ray flares with the ARGO-YBJ detector

Author: Y. Q. Guo, B. D'Ettorre Piazzoli, Haibing Hu, H. J. Li, H. R. Wu, C. Bleve, Y. Zhang, L. Xue, X. B. Qu, D. Martello, C. Stanescu, Chang-Chun Ning, B. Bartoli, R. Santonico, Zhaoyang Feng, X. H. Ding, Hong-peng Lu, Jilong Zhang, F. Galeazzi, B. Z. Dai, F. R. Zhu, Y. X. Yan, L. Zhang, F. Ruggieri, Piero Vallania, B. Panico, F. Shi, Y. H. Tan, Zhenyong Feng, C. Liu, P. Branchini, Danzengluobu, X. C. Yang, M. Dattoli, A. K. Calabrese Melcarne, Hongbo Hu, P. Pistilli, X. X. Zhou, C. Y. Wu, M. Iacovacci, M. Zha, X. H. Ma, A. Surdo, R. Cardarelli, C. F. Feng, M. Panareo, J. K. K. Liu, A. Cappa, G. Marsella, Bingwei Xu, E. Giroletti, X. Y. Zhang, Zhiguo Yao, H. H. He, Q. Q. Zhu, Q. B. Gou, A. F. Yuan, Minghui Liu, P. Creti, P. Galeotti, A. Budano, P. Salvini, Labaciren, Jianli Zhang, A. Pagliaro, I. De Mitri, X. D. Sheng, P. R. Shen, Paolo Bernardini, S. Mastroianni, T. Di Girolamo, T. L. Chen, H. M. Zhang, P. Celio, Q. Huang, Q. Y. Yang, I. Bolognino, G. Liguori, Zhaxiciren, G. Zizzi, J. Y. Li, G. Di Sciascio, C. X. Liu, H. W. Wang, G. D'Alí Staiti, Y. B. Chen, H. Y. Jia, Carlo Vigorito, Irina James, G. Mancarella, Paolo Camarri, L. Perrone, Zihuang Cao, X. X. Li, B. S. Wang, Zhaxisangzhu, S. M. Mari, P. F. Zhang, X. J. Bi, S. Z. Chen, C. Cattaneo, E. Rossi, Paolo Montini, R. Iuppa, S. Vernetto, S. Catalanotti, S. W. Cui, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali' Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HBa, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, XB, Rossi, E, Ruggieri, F, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLo, Zhang, JLi, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Barton, B, Bi, Xj, Melcarne, Akc, Chen, Sz, Chen, Tl, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Ilacovacci, M, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Ning, Cc, Qu, Xb, Santonicoi, R, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Xu, B, Yan, Yx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Wide field of view, Nuclear and High Energy Physics, Monitoring, Astrophysics::High Energy Astrophysical Phenomena, ARGO-YBJ, Flaring phenomenon, VHE extragalactic source, Astrophysics, Settore FIS/05 - Astronomia E Astrofisica, Instrumentation, Sorgenti VHE extragalattiche, Argo, Cherenkov radiation, Physics, Fenomeni transienti, Warning system, Detector, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Monitoring Flaring Phenomenon, Astronomy, Wide field, Duty cycle, Ampio campo di vista, Flaring phenomena, VHE extragalactic sources, Gamma Ray Bursts, Large Field of view telescope, ARGO-YBJ, Gamma-ray burst
Abstract: Detecting and monitoring emissions from flaring gamma-ray sources in the very-high-energy (VHE, > 100 GeV) band is a very important topic in gamma-ray astronomy. The ARGO-YBJ detector is characterized by a high duty cycle and a wide field of view. Therefore, it is particularly capable of detecting flares from extragalactic objects. Based on fast reconstruction and analysis, real-time monitoring of 33 selected VHE extragalactic sources is implemented. Flares exceeding a specific threshold are reported timely, hence enabling the follow-up observation of these objects using more sensitive detectors, such as Cherenkov telescopes. (C) 2011 Elsevier B.V. All rights reserved.
Published: 2011

24. THE ARGO-YBJ EXPERIMENT: A FULL COVERAGE ARRAY FOR γ-RAY ASTRONOMY

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, BUSSINO, Severino Angelo Maria, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, DE VINCENZI, Mario, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, MARI, Stefano Maria, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Gamma ray burst, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Detector, Extensive air shower, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Extensive air showers, gamma rays, gamma-ray burst, Astronomy and Astrophysics, Astrophysics, Air shower, Space and Planetary Science, Duty cycle, Sky, Blazar, Gamma-ray burst, Mathematical Physics, Argo, media_common
Abstract: The ARGO-YBJ experiment is an Extensive Air Shower (EAS) array which combines high altitude location and full coverage active area in order to reach low energy threshold at a level of few hundred of GeV. The large field of view (≈ 2 sr ) and the high duty cycle (≥ 90%) allow the continuous monitoring of the sky searching for unknown sources and unpredictable events, such as flares in blazar emissions and high energy Gamma-Ray Bursts (GRBs). In this paper I will briefly report on the detector performance and on some preliminary results achieved in γ-ray astronomy.
Published: 2011

25. Gamma-Ray Flares from Mrk421 in 2008 observed with the ARGO-YBJ detector

Author: Aielli, G., Bacci, C., Bartoli, B., Bernardini, P., Xj, B., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, S., Cattaneo, C., Celio, P., Chen, S., Chen, Y., Cheng, N., Creti, P., Cui, S., Dai, B., D'Ali'Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., D’Ettorre Piazzoli, B., De Vincenzi, M., Di Girolamo, T., Ding, X., Di Sciascio, G., Feng, C., Feng, Z., Galeazzi, F., Galeotti, P., Gargana, R., Gou, Q., Guo, Y., Hh, H., Hbi, H., Hbo, H., Huang, Q., Iacovacci, M., Iuppa, R., James, I., Jia, H., Labaciren, Hj, L., Jy, L., Xx, L., Liberti, B., Liguori, G., Liu, C., Liu, J., Liu, M., Lu, H., Xh, M., Mancarella, G., Mari, S., Marsella, G., Martello, D., Mastroianni, S., Meng, X., Montini, P., Ning, C., Pagliaro, A., Panareo, M., Perrone, L., Pistilli, P., Xb, Q., Rossi, E., Ruggieri, F., Saggese, L., Salvini, P., Santonico, R., Shen, P., Sheng, X., Shi, F., Stanescu, C., Surdo, A., Tan, Y., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Cy, W., Hr, W., Xu, B., Xue, L., Yan, Y., Yang, Q., Yang, X., Yuan, A., Zha, M., Zhang, H., Zhang, J., Zhang, L., Zhang, P., Zhang, X., Zhang, Y., Zhaxisangzhu, Zhou, X., Zhu, F., Zhu, Q., Zizzi, G., G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, Zizzi, Giovanni, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Branchini, P, Budano, A, Bussino, S, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, Y, Cheng, N, Creti, P, Cui, SW, Dai, BZ, D’Ali Staiti, G, Dattoli, M, De Mitri, I, D’Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Gargana, R, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Li, HJ, Li, JY, Li, XX, Liberti, B, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Meng, XR, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, XB, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, Bi, Xj, Bussino, Severino Angelo Maria, Melcarne, Akc, Chen, Sz, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Meng, Xr, Ning, Cc, Qu, Xb, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, and Mastroianni, Stefano
Subjects: Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, Astrophysics, BL Lacertae object, Settore FIS/05 - Astronomia E Astrofisica, Extended Air showers, Settore FIS/05 - Astronomia e Astrofisica, general" ["gamma rays], Blazar, BL Lacertae objects, Markarian 421, gamma rays, Cherenkov radiation, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Spectral index, individual (Markarian 421)" ["BL Lacertae objects], Settore FIS/01 - Fisica Sperimentale, Gamma ray, individual (Markarian 421) - gamma rays: observations [BL Lacertae objects], Astronomy and Astrophysics, Air shower, Crab Nebula, Space and Planetary Science, gamma ray, Intergalactic travel, Astrophysics - High Energy Astrophysical Phenomena
Abstract: In 2008 the blazar Markarian 421 entered a very active phase and was one of the brightest sources in the sky at TeV energies, showing frequent flaring episodes. Using the data of ARGO-YBJ, a full coverage air shower detector located at Yangbajing (4300 m a.s.l., Tibet, China), we monitored the source at gamma ray energies E > 0.3 TeV during the whole year. The observed flux was variable, with the strongest flares in March and June, in correlation with X-ray enhanced activity. While during specific episodes the TeV flux could be several times larger than the Crab Nebula one, the average emission from day 41 to 180 was almost twice the Crab level, with an integral flux of (3.6 +-0.6) 10^-11 photons cm^-2 s^-1 for energies E > 1 TeV, and decreased afterwards. This paper concentrates on the flares occurred in the first half of June. This period has been deeply studied from optical to 100 MeV gamma rays, and partially up to TeV energies, since the moonlight hampered the Cherenkov telescope observations during the most intense part of the emission. Our data complete these observations, with the detection of a signal with a statistical significance of 3.8 standard deviations on June 11-13, corresponding to a gamma ray flux about 6 times larger than the Crab one above 1 TeV. The reconstructed differential spectrum, corrected for the intergalactic absorption, can be represented by a power law with an index alpha = -2.1 extending up to several TeV. The spectrum slope is fully consistent with previous observations reporting a correlation between the flux and the spectral index, suggesting that this property is maintained in different epochs and characterizes the source emission processes., Accepted for publication on ApJL
Published: 2010

26. Gamma-ray flares from Mrk421 in 2008 observed with the ARGO-YBJ experiment

Author: G. AIELLI, C. BACCI, B. BARTOLI, X. J. BI, C. BLEVE, P. BRANCHINI, A. BUDANO, S. BUSSINO, A. K. CALABRESE MELCARNE, P. CAMARRI, Z. CAO, A. CAPPA, R. CARDARELLI, S. CATALANOTTI, C. CATTANEO, P. CELIO, S. Z. CHEN, Y. CHEN, N. CHENG, P. CRETI, S. W. CUI, B. Z. DAI, G. D’ALÍ STAITI, DANZENGLUOBU, M. DATTOLI, B. D’ETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, F. GALEAZZI, P. GALEOTTI, R. GARGANA, Q. B. GOU, Y. Q. GUO, H. H. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, R. IUPPA, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, X. X. LI, B. LIBERTI, G. LIGUORI, C. LIU, C. Q. LIU, M. Y. LIU, J. LIU, H. LU, X. H. MA, S. M. MARI, S. MASTROIANNI, X. R. MENG, P. MONTINI, C. C. NING, A. PAGLIARO, P. PISTILLI, X. B. QU, E. ROSSI, F. RUGGIERI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, C. VIGORITO, B. WANG, H. WANG, C. Y. WU, H. R. WU, B. XU, L. XUE, Y. X. YAN, Q. Y. YANG, X. C. YANG, A. F. YUAN, M. ZHA, H. M. ZHANG, JILONG ZHANG, JIANLI ZHANG, L. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOU, F. R. ZHU, Q. Q. ZHU, G. ZIZZI, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: TeV gamma-ray flares – Gamma rays: observations [Mrk421 – Galaxy]
Abstract: In 2008, the blazar Mrk421 entered in a very active phase and was one of the brightest sources in the sky at TeV energies, showing strong and frequent flaring. We searched for gamma-ray emission at energies E>0.8 TeV during the whole 2008 with the ARGO-YBJ experiment, a full coverage air shower detector located at Yangbajing (4300 m a.s.l., Tibet, P.R. China). The observed signal is not constant and in correlation with X-ray measurements. The average emission, during the active period of the source, was about twice the Crab Nebula level. This paper concentrates on 2008 June when the Mrk421 flaring activity has been studied from optical to 100 MeV gamma rays, and only partially up to TeV energies, since the moonlight hampered the Cherenkov telescope observations after 8 June. Our data complete these observations, with the detection of a second flare of intensity of about 7 Crab units on June 11-13, with a statistical significance of 4.2 standard deviations. The observed flux is consistent with a prediction made in the framework of the Synchrotron Self-Compton model, in which the flare is caused by a rapid acceleration of leptons in the jet.
Published: 2010

27. Gamma -ray astronomy with the ARGO-YBJ experiment

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, BUSSINO, Severino Angelo Maria, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, De Vincenzi M, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, MARI, Stefano Maria, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., DI GIROLAMO, Tristano, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Physics, History, Gamma-ray astronomy, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Detector, Extensive air shower, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astrophysics, Computer Science Applications, Education, Argo-Ybj, Air shower, Gamma Astronomy [Resistive Plate Counters, Gamma Ray Bursts], Duty cycle, Sky, Extensive Air Showers, Cosmic Ray, Gamma-ray burst, Blazar, Argo, media_common
Abstract: The ARGO-YBJ experiment is an Extensive Air Shower detector which combines high altitude location (Tibet, People's Republic of China, 4300 m a.s.l.) and full coverage with Resistive Plate Counters, resulting in an energy threshold of a few hundred GeV. The large field of view (~2 sr) and high duty cycle allow the continuous monitoring of the Northern sky, searching for unknown sources and unpredictable events, such as flares in blazar emissions or high energy Gamma Ray Bursts. In this paper I will present some results obtained in γ-ray astronomy with the ARGO-YBJ experiment.
Published: 2010

28. Proton-air cross section measurement with the ARGO-YBJ cosmic ray experiment

Author: I. De Mitri, B. D'Ettorre Piazzoli, A. K. Calabrese Melcarne, P. Pistilli, H. M. Zhang, G. Marsella, X. X. Zhou, Enrico Rossi, Giovanni Mancarella, L. Xue, F. Galeazzi, P. Galeotti, C. Liu, Jilong Zhang, G. D'Alí Staiti, P. Vallania, A. Surdo, X. X. Li, Q. Huang, Giulio Aielli, Hong-peng Lu, X. H. Ma, Longzhou Zhang, Q. Q. Zhu, C. Bacci, G. Liguori, Haibing Hu, M. Y. Liu, A. Pagliaro, A. F. Yuan, Zhenyong Feng, Huaguang Wang, C. Bleve, Paolo Camarri, Y. Zhang, B. Bartoli, X. D. Sheng, Fudong Shi, Q. Y. Yang, N. Cheng, X. R. Meng, G. Zizzi, D. Martello, J. K. K. Liu, C. Cattaneo, J. Y. Li, R. Gargana, Danzengluobu, Labaciren, S. Mastroianni, R. Santonico, M. Iacovacci, Chang-Chun Ning, B. S. Wang, S. M. Mari, X. Y. Zhang, L. Perrone, Zhaxisangzhu, Zhaoyang Feng, Y. Q. Guo, Jianli Zhang, P. Creti, Zihuang Cao, F. Ruggieri, A. Cappa, Carlo Vigorito, Y. X. Yan, Antonio Budano, S. W. Cui, C. Y. Wu, Barbara Liberti, X. B. Qu, C. Q. Liu, X. C. Yang, P. Salvini, X. H. Ding, L. Saggese, P. F. Zhang, X. J. Bi, Irina James, Roberto Cardarelli, P. Bernardini, S. Z. Chen, Y. H. Tan, F. R. Zhu, Paolo Montini, R. Iuppa, S. Catalanotti, M. Panareo, G. Di Sciascio, T. Di Girolamo, P. Celio, H.H. He, M. Dattoli, M. De Vincenzi, Y. B. Chen, Hongbo Hu, C. F. Feng, H. Y. Jia, H. J. Li, S. Vernetto, H. R. Wu, P. R. Shen, M. Zha, B. Z. Dai, Cristian Stanescu, P. Branchini, Bingwei Xu, Severino Angelo Maria Bussino, Q. B. Gou, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Branchini, P, Budano, A, Bussino, S, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, Y, Cheng, N, Creti, P, Cui, SW, Dai, BZ, D'Ali'Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, F, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Gargana, R, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liberti, B, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Meng, XR, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, XB, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, Bleve, Carla, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali' Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, Zizzi, Giovanni, Bi, Xj, Bussino, Severino Angelo Maria, Melcarne, Akc, Chen, Sz, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Meng, Xr, Ning, Cc, Qu, Xb, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, B., D???Ettorre Piazzoli, DI GIROLAMO, Tristano, Iacovacci, Michele, and Collaborazione ARGO, Ybj
Subjects: Nuclear and High Energy Physics, Cosmic rays, Proton-air cross section, gamma astronomy, Proton, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Cosmic ray, Cross Section, 01 natural sciences, Cosmic Ray, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, Multiplicity (chemistry), 010306 general physics, Nuclear Experiment, Zenith, Argo, Physics, 010308 nuclear & particles physics, Attenuation, Detector, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, 3. Good health, Hadronic Interaction, High Energy Physics::Experiment, Extensive Air Showers
Abstract: The proton-air cross section in the energy range 1-100 TeV has been measured by the ARGO-YBJ cosmic ray experiment. The analysis is based on the flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits the detector capabilities of selecting the shower development stage by means of hit multiplicity, density and lateral profile measurements at ground. The effects of shower fluctuations, the contribution of heavier primaries and the uncertainties of the hadronic interaction models, have been taken into account. The results have been used to estimate the total proton-proton cross section at center of mass energies between 70 and 500 GeV, where no accelerator data are currently available., Comment: 14 pages, 9 figures
Published: 2009

29. Results from ARGO-YBJ

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, BUSSINO, Severino Angelo Maria, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, De Vincenzi M, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, MARI, Stefano Maria, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bastieri, D, Rando, R, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, and Iacovacci, Michele
Subjects: Physics, Proton, Astrophysics::High Energy Astrophysical Phenomena, Extensive air shower, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Cosmic ray, Astrophysics, Gamma-ray astronomy, Argo-Ybj, Crab Nebula, Antiproton, Physics::Accelerator Physics, Gamma-ray burst, Argo, ARGO-YBJ, gamma-ray astronomy, cosmic ray physics
Abstract: The ARGO‐YBJ experiment has been put in stable data taking at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l.). In this paper we report a few selected results in Gamma‐Ray Astronomy (Crab Nebula and Mrk421 observations, search for high energy tails of Gamma Ray Bursts) and Cosmic Ray Physics (Moon and Sun shadow observations, proton‐air cross section measurement, preliminary measurement of the antiproton∕proton ratio at TeV energies).
Published: 2009

30. Software Timing Calibration of the ARGO-YBJ Detector

Author: A. Cappa, F. R. Zhu, L. Perrone, M. Panareo, P. Zhang, C. Y. Wu, P. Salvini, A. F. Yuan, L. Zhang, Q. Q. Zhu, X. R. Meng, Y.G. Wang, N. Cheng, P. Pistilli, C. Stanescu, Zhaoyang Feng, X. X. Zhou, S. Mastroianni, S. Catalanotti, H.T. Yang, Piero Vallania, C. Vigorito, L. Saggese, X. C. Yang, P. Galeotti, B. D'Ettorre Piazzoli, J. K. K. Liu, H. J. Li, H. R. Wu, A. Budano, Zhengguo Cao, H. Y. Jia, M. Iacovacci, M. Zha, R. Gargana, Labaciren, C. Bacci, C. Cattaneo, T. Di Girolamo, M. Dattoli, X. Y. Gao, L. Xue, P. Celio, G.C. Yu, Haoqi Lu, Zhaxisangzhu, I. James, Q. Huang, G. Di Sciascio, G. Cusumano, C. Pino, F. Shi, Danzengluobu, P. Creti, C.C. Ning, M. De Vincenzi, C. Liu, Sergio Cavaliere, Luciano Nicastro, A. K. Calabrese Melcarne, C. Ferrigno, A. Segreto, R. Cardarelli, Y. H. Zhang, G. Marsella, B. Liberti, G. Mancarella, B. Bartoli, P. Camarri, E. Rossi, X. Y. Zhang, H. W. Wang, S. W. Cui, Zhenyong Feng, Huihai He, S. Vernetto, F. Galeazzi, X. D. Sheng, Paolo Bernardini, Hongbo Hu, A. Surdo, C. F. Feng, R. Santonico, P. R. Shen, G. Aielli, Zhang Jingzhe, Bingwei Xu, Severino Angelo Maria Bussino, Q. B. Gou, J. Y. Li, I. De Mitri, L. Palummo, H. M. Zhang, Q. Y. Yang, G. D'Alí Staiti, G. Zizzi, S. M. Mari, J. Mu, X. J. Bi, S. Z. Chen, B. Z. Dai, F. Ruggieri, P. Branchini, X. B. Qu, X. H. Ding, Y. H. Tan, G. Liguori, Haibing Hu, C. Bleve, D. Martello, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Li, J., Li, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, C., Pino, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, AIELLI, G, BACCI, C, BARTOLI, B, BERNARDINI, P, BI, XJ, BLEVE, C, BRANCHINI, P, BUDANO, A, BUSSINO, S, CALABRESE MELCARNE, AK, CAMARRI, P, CAO, Z, CAPPA, A, CARDARELLI, R, CATALANOTTI, S, CATTANEO, C, CAVALIERE, S, CELIO, P, CHEN, SZ, CHENG, N, CRETI, P, CUI, SW, CUSUMANO, G, DAI, BZ, D'ALI'STAITI, G, DANZENGLUOBU, DATTOLI, M, DE MITRI, I, DETTORRE PIAZZOLI, B, DE VINCENZI, M, DI GIROLAMO, T, DING, XH, DI SCIASCIO, G, FENG, CF, FENG, ZHAOYANG, FENG, ZHENYONG, FERRIGNO, C, GALEAZZI, F, GALEOTTI, P, GAO, XY, GARGANA, R, GOU, QB, HE, HH, HU, HAIBING, HU, HONGBO, HUANG, Q, IACOVACCI, M, JAMES, I, JIA, HY, LABACIREN, LI, HJ, LI, JY, LIBERTI, B, LIGUORI, G, LIU, CQ, LIU, J, LU, H, MANCARELLA, G, MARI, SM, MARSELLA, G, MARTELLO, D, MASTROIANNI, S, MENG, XR, MU, J, NICASTRO, L, NING, CC, PALUMMO, L, PANAREO, M, PERRONE, L, PINO, C, PISTILLI, P, QU, XB, ROSSI, E, RUGGIERI, F, SAGGESE, L, SALVINI, P, SANTONICO, R, SEGRETO, A, SHEN, PR, SHENG, XD, SHI, F, STANESCU, C, SURDO, A, TAN, YH, VALLANIA, P, VERNETTO, S, VIGORITO, C, WANG, H, WANG, YG, WU, CY, WU, HR, XU, B, XUE, L, YANG, HT, YANG, QY, YANG, XC, YU, GC, YUAN, AF, ZHA, M, ZHANG, HM, ZHANG, JL, ZHANG, L, ZHANG, P, ZHANG, XY, ZHANG, Y, ZHAXISANGZHU, ZHOU, XX, ZHU, FR, ZHU, QQ, G ZIZZI, g, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Melcarne, Akc, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Cavaliere, S, Celio, P, Chen, Sz, Cheng, N, Creti, P, Cui, Sw, Cusumano, G, Dai, Bz, Staiti, Gd, Dattoli, M, De Mitri, I, Piazzoli, Bd, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Ferrigno, C, Galeazzi, F, Galeotti, P, Gao, Xy, Gargana, R, Gou, Qb, He, Hh, Hu, Hb, Huang, Q, Iacovacci, M, James, I, Jia, Hy, Li, Hj, Li, Jy, Liberti, B, Liguori, G, Liu, Cq, Liu, J, Lu, H, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Mu, J, Nicastro, L, Ning, Cc, Palummo, L, Panareo, M, Perrone, L, Pino, C, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Segreto, A, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, H, Wang, Yg, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yang, Ht, Yang, Qy, Yang, Xc, Yu, Gc, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, Cavaliere, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, and Iacovacci, Michele
Subjects: Physics, Pixel, Calibration (statistics), business.industry, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Settore FIS/01 - Fisica Sperimentale, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Astronomia gamma, Gamma Astronomy, Timing Calibration, Extensive Air Showers, Sciami estesi, Calibrazione temporale, Optics, Software, Raggi cosmici, Settore FIS/05 - Astronomia e Astrofisica, Angular resolution, business, Argo, Remote sensing
Abstract: The ARGO-YBJ experiment is mainly devoted to search for astronomical gamma sources. The arrival direction of air showers is reconstructed thanks to the times measured by the pixels of the detector. Therefore, the timing calibration of the detector pixels is crucial in order to get the best angular resolution and pointing accuracy. Because of the large number of pixels a hardware timing calibration is practically impossible. Therefore an off-line software calibration has been adopted. Here, the details of the procedure and the results are presented. (C) 2008 Elsevier B.V. All rights reserved.
Published: 2009

31. Results and overview from the ARGO-YBJ experiment

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alì Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alì Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, and Iacovacci, Michele
Subjects: Physics, Nuclear and High Energy Physics, Extensive air shower, Astronomy, Cosmic ray, Astrophysics, Extensive Air Showers, Gamma Astronomy, Array Detector, Cosmic Ray, Atomic and Molecular Physics, and Optics, Argo, Argo-Ybj
Abstract: Within a Collaboration Agreement between INFN and CAS (Chinese Academy of Science), the ARGO-YBJ experiment is completely installed and has been in stable data taking since November 2007 at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l.). In this paper we report a few selected results in γ -ray Astronomy and Cosmic Ray Physics.
Published: 2009

32. ARGO-YBJ constraints on very high energy emission from GRBs

Author: G. Aielli, C. Bacci, B. Bartoli, X. J. Bi, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, Y. Chen, N. Cheng, P. Creti, S. W. Cui, B. Z. Dai, G. D'Ali' Staiti, Danzengluobu, M. Dattoli, B. D'Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, Y. R. Li, B. Liberti, G. Liguori, C. Liu, C. Q. Liu, M. Y. Liu, J. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, BERNARDINI, Paolo, BLEVE, Carla, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, ZIZZI, GIOVANNI, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, Bleve, Carla, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D'Ali' Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D'Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, Y. R., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and Zizzi, Giovanni
Subjects: Gamma ray burst, Extensive air shower, Cosmic rays, Gamma-ray
Abstract: The ARGO-YBJ experiment is designed for very high energy gamma-astronomy and cosmic ray researches. Due to the full coverage of a large area (5600 m^2) with resistive plate chambers at a very high altitude (4300 m a.s.l.), the ARGO-YBJ detector is used to search for transient phenomena, such as gamma-ray bursts (GRBs). Because the ARGO-YBJ detector has a large field of view ( about 2 sr) and is operated with a high duty cycle (>90%), it is one of the best ground-based GRB surveying apparatuses. Working at a relatively high energy threshold around a few hundreds of GeV, the ARGO-YBJ detector is operated in searches for high energy GRBs following alarms set by satellite-borne observations at lower energies. In this paper, the sensitivity of the ARGO-YBJ detector for GRB detection is estimated. Upper limits to fluence with 99% confidence level for 30 GRBs inside the field of view from June 2006 to January 2009 are set in the two energy ranges 10 GeV - 100 GeV and 10 GeV-1 TeV.
Published: 2009

33. Simulation study of air shower particles near the core region

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Physics, Nuclear and High Energy Physics, Shower array detector, Particle number, shower core, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Signal, extensive air shower, Atomic and Molecular Physics, and Optics, Computational physics, Argo-Ybj, Core (optical fiber), Nuclear physics, detector array, Analog signal, Air shower, Energy (signal processing)
Abstract: The ARGO-YBJ experiment has two kinds of signals in the shower working mode which allows coverage of the energy region from TeV to PeV region. One is the digital strip pattern, another is so-called ‘big pad’ mode, which is the analog signal counting the pulse height on half of an RPC, proportional to the number of hitting particles. In this paper by using the Monte Carlo simulation method the ARGO-YBJ sensitivity to the cosmic ray composition is discussed, by using the ‘big pad’ signal for measuring the number of particles detected close to the shower core.
Published: 2008

34. Search for gamma ray bursts with the ARGO-YBJ detector in scaler mode

Author: THE ARGO YBJ C.O.L.L.A.B.O.R.A.T.I.O.N.G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. DeVincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, ZhaoyangFeng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarellag, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli a, THE ARGO YBJ C. O. L. L. A. B. O. R. A. T. I. O. N. G., B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., DeVincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, Zhaoyangfeng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarellag, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, G., Zizzi g, Barone, F, Melcarne, Akc, Cavaliere, S, Staiti, Gd, De Rosa, R, Piazzoli, Bd, DE VINCENZI, Mario, Feng, Zy, Gao, Xy, Garufi, F, Hu, Hb, Mu, J, Palummo, L, Segreto, A, Wang, Yg, Yang, Ht, Yu, Gc, Zhang, Jl, Bleve, Carla, CALABRESE MELCARNE, ANNA KAREN, G., D’Alì Staiti, Y. Q., Guo, R., Iuppa, Zizzi, Giovanni, DI GIROLAMO, Tristano, Aielli, G., Bacci, C., Barone, F., Bartoli, Bruno, Bernardini, P., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Cavaliere, Sergio, Celio, P., Chen, S. Z., Cheng, N., Creti, P., Cui, S. W., Dai, B. Z., D'Alì Staiti, G., Dattoli, M., De Mitri, I., DE ROSA, Rosario, D'ETTORRE PIAZZOLI, Benedetto, De Vincenzi, M., Ding, X. H., Di Sciascio, G., Feng, C. F., Galeazzi, F., Galeotti, P., Gao, X. Y., Gargana, R., Garufi, Fabio, Gou, Q. B., Guo, Y. Q., Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., Liberti, B., Liguori, G., Liu, C. Q., Liu, J., Lu, H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Meng, X. R., Mu, J., Ning, C. C., Palummo, L., Panareo, M., Perrone, L., Pistilli, P., Rossi, E., Ruggieri, F., Saggese, L., Salvini, P., Santonico, R., Segreto, A., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, H., Wang, Y. G., Xu, B., Xue, L., Yang, H. T., Yang, Q. Y., Yang, X. C., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhou, X. X., Zhu, F. R., Zhu, Q. Q., AIELLI, G, BACCI, C, BARONE, F, BARTOLI, B, BERNARDINI, P, BI, XJ, BLEVE, C, BRANCHINI, P, BUDANO, A, BUSSINO, S, CALABRESE MELCARNE, AK, CAMARRI, P, CAO, Z, CAPPA, A, CARDARELLI, R, CATALANOTTI, S, CATTANEO, C, CAVALIERE, S, CELIO, P, CHEN, SZ, CHENG, N, CRETI, P, CUI, SW, DAI, BZ, D'ALI'STAITI, G, DANZENGLUOBU, DATTOLI, M, DE MITRI, I, DE ROSA, R, DETTORRE PIAZZOLI, B, DE VINCENZI, M, DI GIROLAMO, T, DING, XH, DI SCIASCIO, G, FENG, CF, FENG, ZHAOYANG, FENG, ZHENYONG, GALEAZZI, F, GALEOTTI, P, GAO, XY, GARGANA, R, GARUFI, F, GOU, QB, GUO, YQ, HE, HH, HU, HAIBING, HU, HONGBO, HUANG, Q, IACOVACCI, M, IUPPA, R, JAMES, I, JIA, HY, LABACIREN, LI, HJ, LI, JY, LIBERTI, B, LIGUORI, G, LIU, CQ, LIU, J, LU, H, MANCARELLA, G, MARI, SM, MARSELLA, G, MARTELLO, D, MASTROIANNI, S, MENG, XR, MU, J, NING, CC, PALUMMO, L, PANAREO, M, PERRONE, L, PISTILLI, P, QU, XB, ROSSI, E, RUGGIERI, F, SAGGESE, L, SALVINI, P, SANTONICO, R, SEGRETO, A, SHEN, PR, SHENG, XD, SHI, F, STANESCU, C, SURDO, A, TAN, YH, VALLANIA, P, VERNETTO, S, VIGORITO, C, WANG, H, WANG, YG, WU, CY, WU, HR, XU, B, XUE, L, YANG, HT, YANG, QY, YANG, XC, YU, GC, YUAN, AF, ZHA, M, ZHANG, HM, ZHANG, JL, ZHANG, L, ZHANG, P, ZHANG, XY, ZHANG, Y, ZHAXISANGZHU, ZHOU, XX, ZHU, FR, ZHU, QQ, and ZIZZI, G
Subjects: Nuclear and High Energy Physics, Gamma ray burst, Astrophysics::High Energy Astrophysical Phenomena, Air shower array, Astrophysics, Argo-Ybj, Settore FIS/05 - Astronomia e Astrofisica, Observatory, Gamma Rays Observations, Instrumentation, Zenith, Argo, Physics, Range (particle radiation), Apparati di sciame, Detector, Settore FIS/01 - Fisica Sperimentale, Gamma ray, Gamma ray bursts, Air shower arrays, Mode (statistics), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Redshift, Air shower, Space and Planetary Science, Gamma Ray Bursts, Gamma Ray Emission, Astrophysics - High Energy Astrophysical Phenomena, Gamma-ray burst
Abstract: We report on the search for Gamma Ray Bursts (GRBs) in the energy range 1-100 GeV in coincidence with the prompt emission detected by satellites using the Astrophysical Radiation with Ground-based Observatory at YangBaJing (ARGO-YBJ) air shower detector. Thanks to its mountain location (Yangbajing, Tibet, P.R. China, 4300 m a.s.l.), active surface (about 6700 m**2 of Resistive Plate Chambers), and large field of view (about 2 sr, limited only by the atmospheric absorption), the ARGO-YBJ air shower detector is particularly suitable for the detection of unpredictable and short duration events such as GRBs. The search is carried out using the "single particle technique", i.e. counting all the particles hitting the detector without measurement of the energy and arrival direction of the primary gamma rays. Between 2004 December 17 and 2009 April 7, 81 GRBs detected by satellites occurred within the field of view of ARGO-YBJ (zenith angle < 45 deg). It was possible to examine 62 of these for >1 GeV counterpart in the ARGO-YBJ data finding no statistically significant emission. With a lack of detected spectra in this energy range fluence upper limits are profitable, especially when the redshift is known and the correction for the extragalactic absorption can be considered. The obtained fluence upper limits reach values as low as 10**{-5} erg cm**{-2} in the 1-100 GeV energy region. Besides this individual search for a higher energy counterpart, a statistical study of the stack of all the GRBs both in time and in phase was made, looking for a common feature in the GRB high energy emission. No significant signal has been detected., Comment: accepted for publication in ApJ
Published: 2008

35. Characteristic Plane Method with Conical Correction

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Nuclear and High Energy Physics, Timing Calibration, business.industry, Plane (geometry), Astrophysics::High Energy Astrophysical Phenomena, Detector, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Extensive Air Shower, Conical surface, Cosmic Ray, Characteristic Plane Method, Atomic and Molecular Physics, and Optics, Argo-Ybj, Planar, Optics, Position (vector), Detector Array, Calibration, Angular resolution, business, Physics::Atmospheric and Oceanic Physics
Abstract: In ground-based cosmic ray experiments, the equalization of the transit time of signals coming from different parts of the apparatus is of crucial importance for the improvement of the angular resolution and accuracy. In the ARGO-YBJ experiment, this is achieved using the Characteristic Plane Method with conical correction, studied by both Monte Carlo simulation and real data and also checked with manual absolute calibration on a portion of the detector. By introducing conical correction in primary direction reconstruction, the systematics error existing in the off-line calibration with planar fit is successfully removed. Two subsequent construction phases of the detector have been considered: ARGO-42 and ARGO-104. During the calibration of ARGO-104, events with more than 1000 hits and with the core reconstructed inside the carpet were used in order to achieve a good reconstruction of the shower, that is the arrival direction and the core position. The results of the calibration concerning the two configurations, ARGO-42 and ARGO-104, are compared and discussed.
Published: 2008

36. Status of ARGO-YBJ: an overview

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Gamma ray Astronomy, Nuclear and High Energy Physics, Resistive touchscreen, Gamma Astronomy, Trigger rate, Detector, Cosmic ray, Extensive Air Shower, Gamma-ray astronomy, Atomic and Molecular Physics, and Optics, Argo-Ybj, Nuclear physics, Detector Array, Argo
Abstract: Within a Collaboration Agreement between INFN and CAS (Chinese Academy of Science), the ARGO-YBJ experiment is completely installed at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China). ARGO-YBJ is a plane detector, with a total detection area of ∼ 6500 m 2 , made of Resistive Plate Chambers (RPCs) which provide a detailed space-time picture of the charged component of the extensive air showers. At present the detector is completely mounted and the central carpet of 5800 m 2 is operating under a multiplicity trigger N p a d ⩾ 20 , the trigger rate is about 3.5kHz and the data flow is 5MB/s. A 0.5 cm lead converter will be mounted on the detector in summer 2007.
Published: 2008

37. Simulation of the ARGO-YBJ experiment operated in Scaler Mode

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.
Subjects: Physics, Nuclear and High Energy Physics, array detector, Photon, Proton, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Antenna aperture, Detector, chemistry.chemical_element, scaler mode, Cosmic ray, Atomic and Molecular Physics, and Optics, Spectral line, Computational physics, Argo-Ybj, gamma ray burst, Optics, chemistry, Extended air shower, business, Gamma-ray burst, Energy (signal processing), Helium
Abstract: The ARGO-YBJ experiment is a large area full coverage detector operating at high mountain altitude (4300 m a.s.l., Tibet, China, ∼6700 m2 active surface). In scaler mode, the particle rate is recorded at fixed time intervals (0.5 s), allowing the achievement of an energy threshold as low as E t h ∼ 1 GeV for the photons. This result, together with the estimate of the effective area as a function of the primary energy, has been obtained using the simulation code CORSIKA6201 for the shower development in the atmosphere and a dedicated and detailed detector simulation, ARGOG, based on GEANT3.21. With this simulation chain, and using the known primary proton and helium spectra, we obtained counting rates consistent with the measured ones, making us confident in the expectation of the detector performance as far as the photon shower detection is concerned, which is of crucial importance to determine the capability of the ARGO-YBJ experiment to detect gamma-ray bursts (GRBs).
Published: 2008

38. Performance of the resistive plate chambers in the ARGO-YBJ experiment

Author: The Argo YBJ Collaboration: G. Aielli a, b, C. Bacci c, d, F. Barone e, f, B. Bartoli g, P. Bernardini h, i, X. J. Bi j, C. Bleve h, i, 1, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne h, P. Camarri a, Z. Cao j, A. Cappa k, l, R. Cardarelli b, S. Catalanotti g, C. Cattaneo m, S. Cavaliere g, P. Celio c, S. Z. Chen j, N. Cheng j, P. Creti i, S. W. Cui n, G. Cusumano o, p, B. Z. Dai q, G. D’Alí Staiti p, r, Danzengluobu s, M. Dattoli k, l, t, I. De Mitri h, R. De Rosa g, B. D’Ettorre Piazzoli g, M. De Vincenzi c, T. Di Girolamo g, X. H. Ding s, G. Di Sciascio f, C. F. Feng u, Zhaoyang Feng j, ZhenyongFeng v, C. Ferrigno o, F. Galeazzi d, P. Galeotti k, t, X. Y. Gao q. R. Gargana d, F. Garufig, Q. B. Gou j, H. H. He j, Haibing Hu s, Hongbo Hu j, Q. Huang v, M. Iacovacci g, I. James m, w, H. Y. Jia v, Labaciren s, H. J. Li s, J. Y. Li u, B. Liberti b, G. Liguori m, C. Q. Liuq, J. Liu q, H. Lu j, G. Mancarella h, MARI, Stefano Maria, c, d, G. Marsella i, x, D. Martello h, S. Mastroianni c, X. R. Meng s, J. Mu q, L. Nicastro p, y, C. C. Ning s, L. Palummo a, M. Panareo i, L. Perrone i, P. Pistilli c, X. B. Qu u, E. Rossi f, F. Ruggieri d, L. Saggese g, P. Salvini m, R. Santonico a, A. Segreto o, P. R. Shen j, X. D. Sheng j, F. Shi j, C. Stanescu d, A. Surdo i, Y. H. Tan j, P. Vallania k, S. Vernetto k, C. Vigorito k, H. Wang j, Y. G. Wang j, C. Y. Wu j, H. R. Wu j, B. Xu v, L. Xue u, H. T. Yang q, Q. Y. Yang q, X. C. Yang q, G. C. Yu v, A. F. Yuan s, M. Zha j, H. M. Zhang j, J. L. Zhang j, L. Zhang q, P. Zhang q, X. Y. Zhang u, Y. Zhang j, Zhaxisangzhu s, X. X. Zhou v, F. R. Zhu j, Q. Q. Zhu j, G. Zizzi h, The Argo YBJ Collaboration: G., Aielli a, B, C., Bacci c, D, F., Barone e, F, B., Bartoli g, P., Bernardini h, I, X. J., Bi j, C., Bleve h, I, 1, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne h, P., Camarri a, Z., Cao j, A., Cappa k, L, R., Cardarelli b, S., Catalanotti g, C., Cattaneo m, S., Cavaliere g, P., Celio c, S. Z., Chen j, N., Cheng j, P., Creti i, S. W., Cui n, G., Cusumano o, P, B. Z., Dai q, G., D’Alí Staiti p, R, Danzengluobu, S, M., Dattoli k, L, T, I., De Mitri h, R., De Rosa g, B., D’Ettorre Piazzoli g, M., De Vincenzi c, T., Di Girolamo g, X. H., Ding, G., Di Sciascio f, C. F., Feng u, Zhaoyang Feng, J, Zhenyongfeng, V, C., Ferrigno o, F., Galeazzi d, P., Galeotti k, T, X. Y. Gao q. R., Gargana d, F., Garufig, Q. B., Gou j, H. H., He j, Haibing Hu, S, Hongbo Hu, J, Q., Huang v, M., Iacovacci g, I., James m, W, H. Y., Jia v, Labaciren, S, H. J., Li, J. Y., Li u, B., Liberti b, G., Liguori m, C. Q., Liuq, J., Liu q, H., Lu j, G., Mancarella h, Mari, Stefano Maria, C, D, G., Marsella i, X, D., Martello h, S., Mastroianni c, X. R., Meng, J., Mu q, L., Nicastro p, Y, C. C., Ning, L., Palummo a, M., Panareo i, L., Perrone i, P., Pistilli c, X. B., Qu u, E., Rossi f, F., Ruggieri d, L., Saggese g, P., Salvini m, R., Santonico a, A., Segreto o, P. R., Shen j, X. D., Sheng j, F., Shi j, C., Stanescu d, A., Surdo i, Y. H., Tan j, P., Vallania k, S., Vernetto k, C., Vigorito k, H., Wang j, Y. G., Wang j, C. Y., Wu j, H. R., Wu j, B., Xu v, L., Xue u, H. T., Yang q, Q. Y., Yang q, X. C., Yang q, G. C., Yu v, A. F., Yuan, M., Zha j, H. M., Zhang j, J. L., Zhang j, L., Zhang q, P., Zhang q, X. Y., Zhang u, Y., Zhang j, Zhaxisangzhu, S, X. X., Zhou v, F. R., Zhu j, Q. Q., Zhu j, G., Zizzi h, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, J., Mu, L., Nicastro, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Resistive touchscreen, Gamma-ray astronomy, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, Settore FIS/01 - Fisica Sperimentale, Extensive Air Shower, Extensive Air Showers, Resistive Plate Chambers, Resistive Plate Chambers, Extensive Air Showers, Gamma-ray astronomy, Nuclear physics, Optics, Sampling (signal processing), High Energy Physics::Experiment, Current (fluid), business, Instrumentation, Energy (signal processing), Order of magnitude, Argo
Abstract: The ARGO-YBJ experiment is designed for the detection of Extensive Air Showers (EAS) in the primary energy range 100 GeV–10 TeV. Its full-coverage feature allows to lower the energy threshold about one order of magnitude with respect to sampling EAS detectors. Here the performance of the RPC array is described and the current status of the experiment is presented.
Published: 2007

39. GRBs search results with the ARGO-YBJ experiment operated in scaler mode

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, BUSSINO, Severino Angelo Maria, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, De Vincenzi M, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, MARI, Stefano Maria, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., DI SCIASCIO, DI GIROLAMO, Tristano, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, and Q. Q., Zhu
Subjects: Physics, Range (particle radiation), Gamma ray burst, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Detector, Mode (statistics), FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, gamma-ray burst, Cosmic rays, Extensive air showers [Gamma-ray sources], Cosmic Ray, Coincidence, Raggi cosmici, Space and Planetary Science, Extensive air showers, Satellite, Sciami atmosferici estesi, Gamma-ray burst, Energy (signal processing), Argo
Abstract: The ARGO-YBJ experiment is almost completely installed at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China). The lower energy limit of the detector (E $\sim$ 1 GeV) is reached with the scaler mode, i.e., recording the single particle rate at fixed time intervals. In this technique, due to its high altitude location and large area ($\sim$ 6700 m$^2$), this experiment is the most sensitive among all present and past ground-based detectors. In the energy range under investigation, signals due to local (e.g. solar GLEs) and cosmological (e.g. GRBs) phenomena are expected as significant enhancements of the counting rate over the background. Results on the search for GRBs in coincidence with satellite detections are presented., Proc. of "The Multi-Messenger Approach To High Energy Gamma-Ray Sources" Workshop, Barcelona, July 4-7, 2006
Published: 2007

40. The status of the ARGO experiment at YBJ

Author: G. AIELLI, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, C. BLEVE, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, S. Z. CHEN, N. CHENG, P. CRETI, S. W. CUI, G. CUSUMANO, B. Z. DAI, DANZENGLUOBU, X. H. DING, G. D'ALI STAITI, B. D'ETTORRE PIAZZOLI, E. DE MARINIS, I. DE MITRI, T. DI GIROLAMO, G. DI SCIASCIO, C. F. FENG, ZHAO YANG FENG, ZHEN YONG FENG, C. FERRIGNO, X. Y. GAO, Q. B. GOU, H. H. HE, HONG BO HU, HAI BING HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, J. Y. LI, H. J. LI, B. LIBERTI, G. LIGOURI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, MARI, Stefano Maria, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, L. PALUMMO, M. PANAREO, L. PERRONE, P. PISTILLI, X. B. QU, E. REALI, E. ROSSI, B. SACCO, L. SAGGESE, P. SALVINI, A. SEGRETO, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, Y. G. WANG, C. Y. WU, B. XU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, L. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOU, F. R. ZHU, Q. Q. ZHU, ROME U, TOR VERGATA INFN, ROME ROME III U. INFN, ROME NAPLES U. INFN, NAPLES LECCE U. INFN, LECCE BEIJING, I.N.S.T. HIGH ENERGY P.H.Y.S. HEBEI NORMAL U. IASF, PALERMO INFN, CATANIA YUNNAN U. TIBET U. PALERMO U. SHANDONG U. SICHUAN U. PAVIA U. INFN, PAVIA IFSI, TURIN INFN, TURIN, DE VINCENZI, Mario, G., Aielli, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, C., Bleve, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, Danzengluobu, X. H., Ding, G., D'ALI STAITI, B., D'ETTORRE PIAZZOLI, E., DE MARINIS, I., DE MITRI, DE VINCENZI, Mario, T., DI GIROLAMO, G., DI SCIASCIO, C. F., Feng, ZHAO YANG, Feng, ZHEN YONG, Feng, C., Ferrigno, X. Y., Gao, Q. B., Gou, H. H., He, HONG BO, Hu, HAI BING, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, J. Y., Li, H. J., Li, B., Liberti, G., Ligouri, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, M., Panareo, L., Perrone, P., Pistilli, X. B., Qu, E., Reali, E., Rossi, B., Sacco, L., Saggese, P., Salvini, A., Segreto, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Y. G., Wang, C. Y., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, Rome, U, TOR VERGATA, Infn, ROME ROME III U., Infn, ROME NAPLES U., Infn, NAPLES LECCE U., Infn, Lecce, Beijing, Iasf, I. N. S. T. HIGH ENERGY P. H. Y. S. HEBEI NORMAL U., Palermo, Infn, CATANIA YUNNAN U. TIBET U. PALERMO U. SHANDONG U. SICHUAN U. PAVIA U., Infn, Pavia, Ifsi, Turin, Infn, and Turin
Published: 2007

41. First results on the angular resolution of the ARGO-YBJ detector

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, C., Baccia, K. Z., Baob, F., Baronec, B., Bartolic, P., Bernardinid, S., Bussinoa, E., Callonic, B. Y., Caoe, R., Cardarellif, S., Catalanottic, S., Cavalierec, F., Cesaronid, P., Cretid, Danzengluobug, B., D’Ettorrepiazzolic, M., De Vincenzia, T., Di Girolamoc, G., Di Sciascioc, Z. Y., Fengh, Y., Fue, X. Y., Gaoi, Q. X., Gengi, H. W., Guog, H. H., Hej, M., Hee, Q., Huangh, M., Iacovaccic, N., Iuccia, H. Y., Jaih, C. L., Jingj, F. M., Konge, H. H., Kuangj, Labacireng, B., Lib, J. Y., Lie, Z. Q., Liui, H., Luj, X. H., Maj, G., Mancarellad, Mari, Stefano Maria, A, G., Marsellad, D., Martellod, X. R., Mengg, L., Milanoc, J., Mui, M., Panareod, Z. R., Pengj, P., Pistillia, L., Saggesec, R., Santonicof, P. R., Shenj, C., Stanescua, L. R., Sunb, S. C., Sunb, A., Surdod, Y. H., Tanj, S., Vernettok, C. R., Wange, H., Wangj, H. Y., Wangj, Y. N., Weib, H. T., Yangj, Q. K., Yaob, G. C., Yuh, X. D., Yueb, A. F., Yuang, M., Zhaj, H. M., Zhangj, J. L., Zhangj, N. J., Zhange, X. Y., Zhange, Zhaxisangzhug, Zhaxicireng, Q. Q., Zhuj, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, and Q. Q., Zhu
Subjects: History, Geography, Extended Air shower, Detector, Air shower array, Angular resolution, Cosmic Ray, Extensive Air Shower, Array Detector, Angular Resolution, Cartography, Argo, Computer Science Applications, Education, Remote sensing, Argo-Ybj
Abstract: We present the first results on the angular resolution of the ARGO-YBJ detector in data taking at the Yangbajing Laboratory (Tibet, People's Republic of China, 4300 m a.s.l.).
Published: 2006

42. Layout and performance of RPC used in the Argo-YBJ experiment

Author: C. Y. Wu, Haibing Hu, S. Bricola, C. Bleve, B. D'Ettorre Piazzoli, H.T. Yang, L. Saggese, X. Y. Zhang, Q. Q. Zhu, C. Pinto, C.C. Ning, L. Perrone, P. Salvini, L. Xue, Zhengguo Cao, J. Y. Li, G. D'Alí Staiti, R. Santonico, P. Pistilli, X. X. Zhou, Hongbo Hu, C. F. Feng, K Fratini, A. F. Yuan, A. Surdo, Labaciren, P. Vallania, X. J. Bi, Yonggang Wang, Q. Huang, F. Shi, P. R. Shen, M. Zha, Zhaxisangzhu, X. R. Meng, I. De Mitri, Zhaoyang Feng, R. Assiro, Zhenyong Feng, T. Di Girolamo, H. M. Zhang, I. James, J. Mu, P. Celio, C. Pino, Haoqi Lu, N.J. Zhang, Y. H. Zhang, Luciano Nicastro, M. Iacovacci, G. Mancarella, F. R. Zhu, D. Martello, Yungang Wang, C. Liu, S. Vernetto, M. Cavalli Sforza, P. Zhang, S. M. Mari, B. D'Aquino, Sergio Cavaliere, D. Campana, A. Mangano, G. Pellizzoni, B. Liberti, B. Z. Dai, Huihai He, E. De Marinis, Cristian Stanescu, G. Aielli, H. J. Li, H. R. Wu, Severino Angelo Maria Bussino, Q. B. Gou, G. Di Sciascio, M. De Vincenzi, H. Y. Jia, C. Bacci, S. Mastroianni, F. Budano, Jianbing Zhang, H. W. Wang, B. Biondo, G.C. Yu, X. D. Sheng, X.F. Gao, A. K. Calabrese Melcarne, G. Marsella, L. Zhang, P. Bernardini, Xc Yang, Giancarlo Cusumano, G. Liguori, M. He, Q. Y. Yang, Paolo Camarri, Eva Reali, N. Cheng, Danzengluobu, X. H. Ding, Roberto Cardarelli, Y. H. Tan, P. Creti, J. K. K. Liu, S. Catalanotti, M. Panareo, E. Rossi, B. Bartoli, THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, N., Cheng, P., Creti, G., Cusumano, B. Z., Dai, G., DALI STAITI, Danzengluobu, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, H. H., He, M., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, A., Mangano, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, M., Panareo, L., Perrone, C., Pino, C., Pinto, P., Pistilli, E., Rossi, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, N. J., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, Q. Q., Zhu, G., Aiellia, R., Assirob, C., Baccic, Bartoli, Bruno, P., Bernardinib, X. J., Bie, B., Biondof, C., Bleveb, S., Bricolag, F., Budanoc, S., Bussinoc, A. K., CALABRESE MELCARNEB, P., Camarria, D., Campanad, Z., Caoe, R., Cardarellia, Catalanotti, Sergio, Cavaliere, Sergio, M., CAVALLI SFORZAC, P., Celioc, N., Chenge, P., Cretib, G., Cusumanof, B. Z., Daih, G., DAL STAITII, Danzengluobuj, B., Daquinod, E., DE MARINISC, I., DE MITRIB, D'ETTORRE PIAZZOLI, Benedetto, M., DE VINCENZIC, DI GIROLAMO, Tristano, X. H., Dingj, G., DI SCIASCIOD, C. F., Fengk, Zhaoyang, Fenge, Zhenyong, Fengl, K., Fratinic, X. F., Gaoh, Q. B., Goue, H. H., Hee, M., Hek, Haibing, Huj, Hongbo, Hue, Q., Huangl, Iacovacci, Michele, I., Jamesg, H. Y., Jial, Labacirenj, H. J., Lij, J. Y., Lik, B., Libertia, G., Liguorig, C. Q., Liuh, J., Liuh, H., Lue, G., Mancarellab, A., Manganof, S. M., Maric, G., Marsellab, D., Martellob, Mastroianni, Stefano, X. R., Mengj, J., Muh, L., Nicastrof, C. C., Ningj, M., Panareob, G., Pellizzonic, L., Perroneb, C., Pinob, C., Pintob, P., Pistillic, E., Realia, Rossi, Elvira, Saggese, Luigi, P., Salvinig, R., Santonicoa, P. R., Shene, X. D., Shenge, F., Shie, C., Stanescuc, A., Surdob, Y. H., Tane, P., Vallaniam, S., Vernettom, H., Wange, Yonggang, Wangk, Yungang, Wange, C. Y., Wue, H. R., Wue, L., Xuek, H. T., Yangh, Q. Y., Yangh, X. C., Yangh, G. C., Yul, A. F., Yuanj, M., Zhae, H. M., Zhange, J. L., Zhange, L., Zhangh, N. J., Zhangk, P., Zhangh, X. Y., Zhangk, Y., Zhange, Zhaxisangzhuj, X. X., Zhoul, F. R., Zhue, Q. Q., Zhue, Aielli, G, Assiro, R, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Biondo, B, Bleve, C, Bricola, S, Budano, F, Melcarne, Akc, Camarri, P, Campana, D, Cao, Z, Cardarelli, R, Catalanotti, S, Cavaliere, S, Sforza, Mc, Celio, P, Cheng, N, Creti, P, Cusumano, G, Dai, Bz, Staiti, Gd, D'Aquino, B, De Marinis, E, De Mitri, I, Plazzoli, Bd, DE VINCENZI, Mario, Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Fratini, K, Gao, Xf, Gou, Qb, He, Hh, He, M, Hu, Hb, Huang, Q, Iacovacci, M, James, I, Jia, Hy, Li, Hj, Li, Jy, Liberti, B, Liguori, G, Liu, Cq, Liu, J, Lu, H, Mancarella, G, Mangano, A, Marsella, G, Martello, D, Mastrolanni, S, Meng, Xr, Mu, J, Nicastro, L, Ning, Cc, Panareo, M, Pellizzoni, G, Perrone, L, Pino, C, Pinto, C, Pistilli, P, Reali, E, Rossi, E, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Wang, H, Wang, Yg, Wu, Cy, Wu, Hr, Xue, L, Yang, Ht, Yang, Qy, Yang, Xc, Yu, Gc, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, Nj, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Bernardini, Paolo, S., Bussino, A. K., Calabrese Melcarne, M., Cavalli Sforza, G., D’Alı' Staiti, B., D’Aquino, E., De Marini, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, G., Di Sciascio, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, Panareo, Marco, G., Pellizzoni, Perrone, Lorenzo, E., Reali, X. X., Zhou, R ASSIRO, C BACCI, B BARTOLI, P BERNARDINI, XJ BI, B BIONDO, C BLEVE, S BRICOLA, SBUDANO, S BUSSINO, AK CALABRESE MELCARNE, P CAMARRI, D CAMPANA, Z CAO, S CARDARELLI, S CATALANOTTI, S CAVALIERE, M CAVALLI SFORZA, P CELIO, N CHENG, P CRETI, G CUSUMANO, BZ DAI, D'ALI' STAITI G, DANZENGLUOBU, B DAQUINO, E DE MARINIS, I DE MITRI, B DETTORRE PIAZZOLI, M DE VINCENZI, T DI GIROLAMO, XH DING, G DI SCIASCIO, CFFENG, Z FENG, K FRATINI, XF GAO, QB GOU, HH HE, M HE, H HU, HHU, Q HUANG, M IACOVACCI, I JAMES, HY JIA, LABACIREN, HJ LI, JY LI, B LIBERTI, G LIGUORI, CQ LIU, J LIU, H LU, G MANCARELLA, A MANGANO, SM MARI, G MARSELLA, D MARTELLO, S MASTROIANNI, XR MENG, J MU, L NICASTRO, CC NING, M PANAREO, G PELLIZZONI, L PERRONE, C PINO, C PINTO, P PISTILLI, E REALI, E ROSSI, L SAGGESE, P SALVINI, R SANTONICO, PR SHEN, XD SHENG, F SHI, C STANESCU, A SURDO, XY TAN, P VALLANIA, S VERNETTO, H WANG, Y WANG, CY WU, HR WU, L XUE, HT YANG, QY YANG, XC YANG, GCYU, AF YUAN, M ZHA, HM ZHANG, JL ZHANG, L ZHANG, NJ ZHANG, P ZHANG, XYZHANG, Y ZHANG, ZHAXISANGZOU, XX ZHOU, FR ZHOU, and QQ ZHOU
Subjects: Physics, Nuclear and High Energy Physics, Rivelatori a ga, Physics::Instrumentation and Detectors, Cosmic rays detector, Astrophysics::High Energy Astrophysical Phenomena, Detector, Settore FIS/01 - Fisica Sperimentale, Resistive Plate Chambers, Cosmic Rays, Extended Air Showers, Camere a piani resistivi, Rivelatori di raggi cosmici, Settore AGR/03 - Arboricoltura Generale E Coltivazioni Arboree, Gas detector, Range (statistics), RPC, Granularity, Particle density, Instrumentation, Argo, Remote sensing
Abstract: The layout of the RPCs, used in the Argo-YBJ experiment to image with a high space-time granularity the atmospheric shower, is described in this paper. The detector has been assembled to provide both digital and analog informations in order to cover a wide particle density range with a time accuracy of 1 ns. The experimental results obtained operating the chambers in streamer mode at sea level with a standard gas mixture are presented. (c) 2006 Elsevier B.V. All rights reserved.
Published: 2006

43. Searching for emission from GRBs with the ARGO-YBJ detector

Author: G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, and Q. Q., Zhu
Subjects: Cosmic Ray, Array Detector, Gamma Astronomy, Gamma Ray Burst, Extensive Air Shower
Abstract: The ARGO-YBJ experiment has been designed to decrease the energy threshold of typical Extensive Air Shower arrays by exploiting the high altitute location (Tibet, P. R. of China, 4300 m a.s.l.) and the full coverage.The lower energy limit of the detector (a few GeV) is reached with the single particle technique recording the counting rate at fixed time intervals. We present first results concerning the search for emission from Gamma-Ray Burst in coincidence with satellite detection.
Published: 2006

44. Performance of RPC for the ARGO-YBJ detector operated at the Yangbajing Laboratory

Author: THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, N., Cheng, P., Creti, G., Cusumano, B. Z., Dai, G., DALI STAITI, Danzengluobu, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, H. H., He, M., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, A., Mangano, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, M., Panareo, L., Perrone, C., Pino, C., Pinto, P., Pistilli, E., Rossi, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, N. J., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, and Q. Q., Zhu
Subjects: Gamma-ray astronomy, Extensive air shower, RPCs
Abstract: Bakelite RPCs, assembled according to the ARGO design, have been operated in the high altitude Laboratory of YBJ using dedicated electronics to pick-up the streamer signal. Here we report on the results concerning absorbed current, single counting rate, efficiency and time resolution. Environmental data concerning the operating temperature inside the ARGO experimental hall are also reported.
Published: 2003

45. Results from the ARGO-YBJ test experiment

Author: THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, N., Cheng, P., Creti, G., Cusumano, B. Z., Dai, G., DALI STAITI, Danzengluobu, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, H. H., He, M., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, A., Mangano, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, M., Panareo, L., Perrone, C., Pino, C., Pinto, P., Pistilli, E., Rossi, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, N. J., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, and Q. Q., Zhu
Published: 2000

46. High Altitude test of RPCs for the ARGO-YBJ experiment

Author: THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, Bacci, C., Bao, K. Z., Barone, F., Bartoli, B., Bernardini, Paolo, Buonomo, R., Bussino, S., Calloni, E., Cao, B. Y., Cardarelli, R., Catalanotti, S., Cavaliere, A., Cesaroni, F., Creti, P., Danzengluobu, D'ETTORRE PIAZZOLI, B., DE VINCENZI, M., DI GIROLAMO, T., DI SCIASCIO, G., Feng, Z. Y., Fu, Y., Gao, X. Y., Geng, Q. X., Guo, H. W., H. H., He, He, M., Huang, Q., Iacovacci, M., Iucci, N., Jai, H. Y., Kong, F. M., Kuang, H. H., Labaciren, Li, B., J. Y., Li, Liu, Z. Q., Lu, H., X. H., Ma, Mancarella, G., Mari, S. M., Marsella, Giovanni, Martello, Daniele, Mei, D. M., Meng, X. R., Milano, L., Morselli, A., Mu, J., Panareo, Marco, Parisi, M., Pellizzoni, G., Peng, Z. R., Pinto, C., Pistilli, P., Reali, E., Santonico, R., Severino, G., Shen, P. R., Stanescu, C., Su, J., Sun, L. R., Sun, S. C., Surdo, A., Tan, Y. H., Vernetto, S., Wang, C. R., Wang, H., Wang, H. Y., Wei, Y. N., Yang, H. T., Yao, Q. K., G. C., Yu, Yue, X. D., Yuan, A. F., Zhang, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhaxisangzhu, Zhaxiciren, Zhu, Q. Q., Bernardini, P., Calloni, Enrico, Cesaroni, CARLO FRANCESCO, Danzengluobu, M., D'Ettorre, Piazzoli, Benedetto, De Vincenzi, M., Girolamo, Di, DI GIROLAMO, Tristano, Di Sciascio, G., He, Chaojie, Huang, Weiping, Iacovacci, Michele, Marsella, G., Martello, D., Panareo, M., Zhaxisangzhu, Zhaxiciren, Q. Q. Zhu, THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, N., Cheng, P., Creti, G., Cusumano, B. Z., Dai, G., DALI STAITI, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, M., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, A., Mangano, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, M., Panareo, L., Perrone, C., Pino, C., Pinto, P., Pistilli, E., Rossi, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, N. J., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhol, F. R., Zhu, and Q. Q., Zhu
Subjects: Physics, Nuclear and High Energy Physics, ARGO-YBJ, Astronomy, Cosmic ray, Gamma-ray astronomy, Astrophysics, Extensive air-shower, Effects of high altitude on humans, Electrode impedance, gamma-ray astronomy, RPCs, High mountain, High Energy Physics - Experiment, Ionization chamber, Instrumentation, Argo
Abstract: A 50 m**2 RPC carpet was operated at the YangBaJing Cosmic Ray Laboratory (Tibet) located 4300 m a.s.l. The performance of RPCs in detecting Extensive Air Showers was studied. Efficiency and time resolution measurements at the pressure and temperature conditions typical of high mountain laboratories, are reported., Comment: 16 pages, 10 figures, submitted to Nucl. Instr. Meth
Published: 2000

47. Results from the analysis of data collected with a 50m(2) RPC carpet at YangBaJing

Author: THE ARGO YBJ COLLABORATION, G. AIELLI, R. ASSIRO, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, B. BIONDO, C. BLEVE, S. BRICOLA, F. BUDANO, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, N. CHENG, P. CRETI, G. CUSUMANO, B. Z. DAI, G. DALI STAITI, DANZENGLUOBU, B. DAQUINO, E. DE MARINIS, I. DE MITRI, B. DETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, K. FRATINI, X. F. GAO, Q. B. GOU, H. H. HE, M. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, B. LIBERTI, G. LIGUORI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, A. MANGANO, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, M. PANAREO, L. PERRONE, C. PINO, C. PINTO, P. PISTILLI, E. ROSSI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, YONGGANG WANG, YUNGANG WANG, C. Y. WU, H. R. WU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, J. L. ZHANG, L. ZHANG, N. J. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOL, F. R. ZHU, Q. Q. ZHU, MARI, Stefano Maria, Bacci, C., Bao, K. Z., Barone, F., Bartoli, B., Bernardini, P., Bussino, S., Calloni, E., Cao, B. Y., Cardarelli, R., Catalanotti, S., Cavaliere, A., Cavaliere, S., Cesaroni, F., Creti, P., Danzengluobu, D'ETTORRE PIAZZOLI, B., DE VINCENZI, M., DI GIROLAMO, T., DI SCIASCIO, G., Feng, Z. Y., Fu, Y., Gao, X. Y., Geng, Q. X., Guo, H. W., H. H., He, He, M., Huang, Q., Iacovacci, M., Iucci, N., Jai, H. Y., Kong, F. M., Kuang, H. H., Labaciren, Li, B., J. Y., Li, Liu, Z. Q., Lu, H., X. H., Ma, Mancarella, G., Mari, S. M., Marsella, Giovanni, Martello, Daniele, Mei, D. M., Meng, X. R., Milano, L., Mu, J., Panareo, Marco, Pellizzoni, G., Peng, Z. R., Pinto, C., Pistilli, P., Reali, E., Santonico, R., Sbarra, C., Shen, P. R., Stanescu, C., Su, J., Sun, L. R., Sun, S. C., Surdo, A., Tan, Y. H., Vernetto, S., Wang, C. R., Wang, H., Wang, H. Y., Wei, Y. N., Yang, H. T., Yao, Q. K., G. C., Yu, Yue, X. D., Yuan, A. F., Zhang, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhaxisangzhu, Zhaxiciren, Zhu, Q. Q., C., Bacci, K. Z., Bao, F., Barone, Bartoli, Bruno, P., Bernardini, S., Bussino, Calloni, Enrico, B. Y., Cao, R., Cardarelli, Catalanotti, Sergio, A., Cavaliere, S., Cavaliere, F., Cesaroni, P., Creti, D'ETTORRE PIAZZOLI, Benedetto, M. D., Vincenzi, DI GIROLAMO, Tristano, G. D., Sciascio, Z. Y., Feng, Y., Fu, X. Y., Gao, Q. X., Geng, H. W., Guo, M., He, Q., Huang, Iacovacci, Michele, N., Iucci, H. Y., Jai, F. M., Kong, H. H., Kuang, B., Li, Z. Q., Liu, H., Lu, G., Mancarella, S. M., Mari, G., Marsella, D., Martello, D. M., Mei, X. R., Meng, L., Milano, J., Mu, M., Panareo, C., Pellizzoni, Z. R., Peng, C., Pinto, P., Pistilli, E., Reali, R., Santonico, C., Sbarra, P. R., Shen, C., Stanescu, J., Su, L. R., Sun, S. C., Sun, A., Surdo, Y. H., Tan, S., Vernetto, C. R., Wang, H., Wang, H. Y., Wang, Y. N., Wei, H. T., Yang, Q. K., Yao, X. D., Yue, A. F., Yuan, H. M., Zhang, J. L., Zhang, N. J., Zhang, T. J., Zhang, X. Y., Zhang, Q. Q., Zhu, Piazzoli, B. D., Vincenzi, M. D., Girolamo, T. D., Sciascio, G. D., Mancarella, Giovanni, Pellizzoni, C., THE ARGO YBJ, Collaboration, G., Aielli, R., Assiro, B., Bartoli, X. J., Bi, B., Biondo, C., Bleve, S., Bricola, F., Budano, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, S., Catalanotti, P., Celio, N., Cheng, G., Cusumano, B. Z., Dai, G., DALI STAITI, B., Daquino, E., DE MARINIS, I., DE MITRI, B., DETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, K., Fratini, X. F., Gao, Q. B., Gou, Haibing, Hu, Hongbo, Hu, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, A., Mangano, Mari, Stefano Maria, S., Mastroianni, L., Nicastro, C. C., Ning, L., Perrone, C., Pino, E., Rossi, L., Saggese, P., Salvini, X. D., Sheng, F., Shi, P., Vallania, Yonggang, Wang, Yungang, Wang, C. Y., Wu, H. R., Wu, L., Xue, Q. Y., Yang, X. C., Yang, M., Zha, L., Zhang, P., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhol, F. R., Zhu, Bacci, C, Bao, Kz, Barone, F, Bartoli, B, Bernardini, P, Calloni, E, Cao, By, Cardarelli, R, Catalanotti, S, Cavaliere, A, Cavaliere, S, Cesaroni, F, Creti, P, Piazzoli, Bd, De Vincenzi, M, Di Girolamo, T, Di Sciascio, G, Feng, Zy, Fu, Y, Gao, Xy, Geng, Qx, Guo, Hw, He, Hh, He, M, Huang, Q, Iacovacci, M, Iucci, N, Jai, Hy, Kong, Fm, Kuang, Hh, Li, B, Li, Jy, Liu, Zq, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mei, Dm, Meng, Xr, Milano, L, Mu, J, Panareo, M, Pellizzoni, C, Peng, Zr, Pinto, C, Pistilli, P, Reali, E, Santonico, R, Sbarra, C, Shen, Pr, Stanescu, C, Su, J, Sun, Lr, Sun, Sc, Surdo, A, Tan, Yh, Vernetto, S, Wang, Cr, Wang, H, Wang, Hy, Wei, Yn, Yang, Ht, Yao, Qk, Yu, Gc, Yue, Xd, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Nj, Zhang, Tj, Zhang, Xy, and Zhu, Qq
Subjects: Physics, gamma ray detector, Nuclear and High Energy Physics, Shower, Air shower, Altitude, Meteorology, Data analysis, Gamma Ray Bursts, Effects of high altitude on humans, Instrumentation
Abstract: An RPC carpet covering similar to 10(4) m(2) (ARGO-YBJ experiment) will be installed in the YangBaJing Laboratory (Tibet, People's Republic of China) at an altitude of 4300 m a.s.l. A test-module of similar to 50 m(2) has been put in operation in this laboratory and about 10(6) air shower events have been collected. The RPC performance at high altitude and the carpet capability of reconstructing the shower features are presented. (C) 2000 Elsevier Science B.V. All rights reserved.
Published: 2000

48. Results from the ARGO-YBJ experiment

Author: Aielli G, Bacci C, Bartoli B, Bernardini P, Bi XJ, Bleve C, Branchini P, Budano A, Calabrese Melcarne AK, Camarri P, Cao Z, Cappa A, Cardarelli R, Catalanotti S, Cattaneo C, Celio P, Chen SZ, Chen TL, Chen Y, Cheng N, Creti P, Cui SW, Dai BZ, D'Ali Staiti G, Danzengluobu, Dattoli M, De Mitri I, D'Ettorre Piazzoli B, De Vincenzi M, Di Girolamo T, Ding XH, Di Sciascio G, Feng CF, Feng Zhao Yang, Feng Zhen Yong, Galeazzi F, Galeotti P, Gargana R, Gou QB, Guo YQ, He HH, Hu Haibing, Hu Hong Bo, Huang Q, Iacovacci M, Iuppa R, James I, Jia HY, Labaciren, Li HJ, Li JY, Li XX, Liberti B, Liguori G, Liu C, Liu CQ, Liu MY, Liu J, Lu H, Ma XH, Mancarella G, MARI, Stefano Maria, Marsella G, Martello D, Mastroianni S, Meng XR, Montini P, Ning CC, Pagliaro A, Panareo M, Perrone L, Pistilli P, Qu XB, Rossi E, Ruggieri F, Saggese L, Salvini P, Santonico R, Shen PR, Sheng XD, Shi F, Stanescu C, Surdo A, Tan YH, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu CY, Wu HR, Xu B, Xue L, Yan YX, Yang QY, Yang XC, Yuan AF, Zha M, Zhang HM, Zhang Ji Long, Zhang Jian Li, Zhang L, Zhang P, Zhang XY, Zhang Y, Zhaxisangzhu, Zhou XX, Zhu FR, Zhu QQ, Zizzi G., BUSSINO, Severino Angelo Maria, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, and De Vincenzi, M
Subjects: Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, Blazar, Argo-Ybj, RPCS, Nuclear physics, Cosmic Ray Physic, Air showers, Guard ring, Gamma ray sources, Blazar, Air shower, Instrumentation, Argo, Mathematical Physics, Astroparticle physics, Physics, Resistive touchscreen, Resistive-plate chambers, Large detector systems for particle and astroparticle physics, Gamma ray source, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma-Ray Astronomy, Performance of High Energy Physics Detectors, Air shower, Single layer
Abstract: ""The full coverage extensive air shower detector ARGO-YBJ, located in Tibet at 4300 m of altitude, has monitored the sky at gamma ray energy E>0.6TeV in the declination band from -10° to 70°. In 424 days the Crab Nebula and Mrk421 have been detected with a significance, respectively, of 7.0 and 8.0 standard deviations. The analysis of the cosmic ray background in the same sky band, has revealed the existence of a significant excess of the cosmic ray flux in two localized regions of angular size 10°30°, confirming previous indications. The origin of such excesses is still unexplained. Concerning the gamma ray sources, the measured spectrum of the Crab Nebula is dN\\\/dE=(3.7±0.8)×10-11E-2.67±0.25photonscm-2s-1TeV-1, in agreement with other experiments. During 2008 the observed Mrk421 flux was highly variable, with the strongest flares in MarchJune, in good correlation with X-ray data. One of the most intense flares occurred in the first half of June and has been deeply studied by different detectors in the energy range from optical to 100 MeV gamma rays, but only partially up to TeV energies, since the moonlight hampered the Cherenkov telescope measurements during the second and most intense part of the emission. Our data complete these observations, with the detection of a signal of intensity of about 7 Crab units on June 1113, with a statistical significance of 4.2 standard deviations. The observed flux is consistent with a prediction made in the framework of the Synchrotron Self-Compton model, in which the flare is caused by a rapid acceleration of leptons in the jet. ""
Published: 2013
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49. Highlights from the ARGO-YBJ Experiment

Author: L. Perrone, Carlo Vigorito, X. C. Yang, A. Cappa, Zihuang Cao, Haibing Hu, R. Santonico, H. H. He, C. Liu, Irina James, P. Salvini, C. Bleve, Y. Zhang, X. H. Ma, D. Martello, G. Aielli, Bingwei Xu, X. Y. Zhang, X. X. Li, Severino Angelo Maria Bussino, Q. B. Gou, B. S. Wang, Zhaxisangzhu, Jilong Zhang, A. Pagliaro, Y. X. Yan, F. Shi, M. Iacovacci, M. Zha, M. Dattoli, B. D'Ettorre Piazzoli, Y. Q. Guo, X. D. Sheng, P. R. Shen, H. J. Li, H. R. Wu, P. Pistilli, X. X. Zhou, Piero Vallania, Paolo Bernardini, C. Cattaneo, P. Galeotti, G. Marsella, X. R. Meng, L. Xue, P. Camarri, X. B. Qu, J. K. K. Liu, Q. Huang, Hongbo Hu, Hong-peng Lu, G. Mancarella, C. Stanescu, Chang-Chun Ning, X. H. Ding, A. Surdo, C. F. Feng, Zhaoyang Feng, F. Galeazzi, Y. H. Tan, P. Creti, Zhenyong Feng, Jianli Zhang, M. Y. Liu, B. Liberti, I. De Mitri, T. Di Girolamo, N. Cheng, P. Celio, Q. Q. Zhu, T. L. Chen, H. M. Zhang, S. W. Cui, S. M. Mari, B. Z. Dai, F. Ruggieri, C. Y. Wu, P. Branchini, F. R. Zhu, L. Saggese, M. Panareo, Q. Y. Yang, G. Zizzi, G. D'Alí Staiti, S. Catalanotti, L. Zhang, J. Y. Li, E. Rossi, P. F. Zhang, Y. B. Chen, Paolo Montini, X. J. Bi, R. Iuppa, S. Vernetto, H. W. Wang, S. Z. Chen, A. Budano, A. K. Calabrese Melcarne, S. Mastroianni, R. Cardarelli, B. Bartoli, R. Gargana, Labaciren, A. F. Yuan, G. Di Sciascio, M. De Vincenzi, Danzengluobu, G. Liguori, C. X. Liu, H. Y. Jia, C. Bacci, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Branchini, P, Budano, A, Bussino, S, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, TL, Chen, Y, Cheng, N, Creti, P, Cui, SW, Dai, BZ, D’AlìStaiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D’Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Gargana, R, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, J, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liberti, B, Liguori, G, Liu, C, Liu, CQ, Liu, MY, Liu, J, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Meng, XR, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, XB, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bi, Xj, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Chen, Sz, Chen, Tl, Cui, Sw, Dai, Bz, D'Ali Staiti, G, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Ding, Xh, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Meng, Xr, Ning, Cc, Qu, Xb, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Feng, Zhao-Yang, Feng, Zhen-Yong, Hu, Hong-Bo, Mari, Sm, Zhang, Ji-Long, Zhang, Jian-Li, A. K., Calabrese Melcarne, T. L., Chen, G., D’Alı´ Staiti, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, G., Di Sciascio, L., Xu, Aielli, G., Bacci, C., Bartoli, Bruno, Bernardini, P., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Celio, P., Chen, S. Z., Chen, T. L., Chen, Y., Cheng, N., Creti, P., Cui, S. W., Dai, B. Z., D’Alí Staiti, G., Dattoli, M., De Mitri, I., D'ETTORRE PIAZZOLI, Benedetto, De Vincenzi, M., DI GIROLAMO, Tristano, Ding, X. H., Di Sciascio, G., Feng, C. F., Galeazzi, F., Galeotti, P., Gargana, R., Gou, Q. B., Guo, Y. Q., Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., Liberti, B., Liguori, G., Liu, C., Liu, C. Q., Liu, M. Y., Liu, J., Lu, H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Meng, X. R., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Perrone, L., Pistilli, P., Rossi, E., Ruggieri, F., Saggese, L., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Xu, B., Xue, L., Yan, Y. X., Yang, Q. Y., Yang, X. C., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhou, X. X., Zhu, F. R., and Zhu, Q. Q.
Subjects: History, Astronomy, Flux, Astrophysics, Proton flux, 01 natural sciences, Argo-Ybj, Gamma-ray emission, Settore FIS/05 - Astronomia E Astrofisica, Cosmic-ray physics, Resistive Plate Chambers, Instrumentation, 010303 astronomy & astrophysics, Argo, Physics, Range (particle radiation), Detector, Settore FIS/01 - Fisica Sperimentale, Crab nebula, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Crab nebula, Extensive air showers, Flux ratio, Gamma-ray astronomy, Gamma-ray emission, Ground based, Resistive plate chambers, Astronomy, Cosmic rays, Cosmology, Experiments, Gamma rays, Flux ratio, Cosmology, Computer Science Applications, Resistive plate chambers, Nuclear and High Energy Physics, X- and γ-ray instrument, Ground-based gamma-ray astronomy, Astrophysics::High Energy Astrophysical Phenomena, Extensive air shower, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmic Ray, Education, Resistive Plate Chambers, Extensive air showers, Ground-based g ray astronomy, Cosmic-ray physics, Ground-based γ-ray astronomy, 0103 physical sciences, Extensive air showers, Cosmic rays, Extensive air showers, X- and γ-ray instruments, Pulsars. Quasars, active or peculiar galaxies, objects and systems, Astrophysics::Galaxy Astrophysics, Gamma-ray astronomy, 010308 nuclear & particles physics, Resistive Plate Chamber, Ground based, Crab Nebula, Antiproton, Satellite, Gamma-ray burst, Experiments
Abstract: ""The ARGO-YBJ experiment at YangBaJing in Tibet (4300m a.s.l.) has been taking data with its full layout since October 2007. Here we present a few significant results obtained in gamma-ray astronomy and cosmic-ray physics. Emphasis is placed on the analysis of gamma-ray emission from point-like sources (Crab Nebula, MRK 421), on the preliminary limit on the antiproton\\\/proton flux ratio, on the large-scale cosmic-ray anisotropy and on the proton-air cross-section. The performance of the detector is also discussed, and the perspectives of the experiment are outlined.""
Published: 2012
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50. Observation of TeV gamma-rays from the unidentified source HESS J1841-055 with the ARGO-YBJ experiment

Author: B. Bartoli1, 2, P. Bernardini3, 4, X. J. Bi5, I. Bolognino6, 7, P. Branchini8, A. Budano8, A. K. Calabrese Melcarne9, P. Camarri10, Z. Cao5, R. Cardarelli11, S. Catalanotti1, C. Cattaneo7, S. Z. Chen5, T. L. Chen12, Y. Chen5, P. Creti4, S. W. Cui13, B. Z. Dai14, G. D’Al´ı Staiti15, A. D’Amone3, 4, Danzengluobu12, I. De Mitri3, B. D’Ettorre Piazzoli1, T. Di Girolamo1, X. H. Ding12, G. Di Sciascio11, C. F. Feng17, Zhaoyang Feng5, Zhenyong Feng18, F. Galeazzi8, E. Giroletti6, Q. B. Gou5, Y. Q. Guo5, H. H. He5, Haibing Hu12, Hongbo Hu5, Q. Huang18, M. Iacovacci1, R. Iuppa10, I. James8, H. Y. Jia18, Labaciren12, H. J. Li12, J. Y. Li17, X. X. Li5, G. Liguori6, C. Liu5, C. Q. Liu14, J. Liu14, M. Y. Liu12, H. Lu5, L. L. Ma5, X. H. Ma5, G. Mancarella3, 8, 19, G. Marsella3, D. Martello3, S. Mastroianni2, P. Montini8, C. C. Ning12, A. Pagliaro16, M. Panareo3, B. Panico10, L. Perrone3, P. Pistilli8, F. Ruggieri8, P. Salvini7, R. Santonico10, S. N. Sbano3, P. R. Shen5, X. D. Sheng5, F. Shi5, A. Surdo4, Y. H. Tan5, P. Vallania21, S. Vernetto21, C. Vigorito22, B. Wang5, H. Wang5, C. Y. Wu5, H. R. Wu5, B. Xu18, L. Xue17, Q. Y. Yang14, X. C. Yang14, Z. G. Yao5, A. F. Yuan12, M. Zha5, H. M. Zhang5, Jilong Zhang5, Jianli Zhang5, L. Zhang14, P. Zhang14, X. Y. Zhang17, Y. Zhang5, J. Zhao5, Zhaxiciren12, Zhaxisangzhu12, X. X. Zhou18, F. R. Zhu18, Q. Q. Zhu5, G. Zizzi9 1 Dipartimento di Fisica dell’Universit`a di Napoli 'Federico II, ' Complesso Universitario di Monte Sant’Angelo, via Cinthia, I. 80126 Napoli, Italy 2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, Italy 3 Dipartimento Matematica e. Fisica 'Ennio De Giorgi, ' Universit`a del Salento, via per Arnesano, I. 73100 Lecce, Italy 4 Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Italy 5 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918, 100049 Beijing, China, c.h.e.n.s.z.@.i.h.e.p. a.c. cn 6 Dipartimento di Fisica dell’Universit`a di Pavia, via Bassi 6, I. 27100 Pavia, Italy 7 Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Italy 8 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, via della Vasca Navale 84, I. 00146 Roma, Italy 9 Istituto Nazionale di Fisica Nucleare CNAF, Viale Berti Pichat 6/2, I. 40127 Bologna, Italy 10 Dipartimento di Fisica dell’Universit`a di Roma 'Tor Vergata, ' via della Ricerca Scientifica 1, I. 00133 Roma, Italy 11 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, Italy 12 Tibet University, 850000 Lhasa, Xizang, China 13 Hebei Normal University, Shijiazhuang 050016, Hebei, China 14 Yunnan University, 2 North Cuihu Road, 650091 Kunming, Yunnan, China 15 Dipartimento di Fisica, Universit`a degli Studi di Palermo, Viale delle Scienze, Edificio 18, I. 90128 Palermo, Italy 16 Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Viale A. Doria 6, I. 95125 Catania, Italy 17 Shandong University, 250100 Jinan, Shandong, China 18 Southwest Jiaotong University, 610031 Chengdu, Sichuan, China 19 Dipartimento di Fisica dell’Universit`a 'Roma Tre, ' via della Vasca Navale 84, Italy 20 Istituto di Astrofisica Spaziale e. Fisica Cosmica dell’Istituto Nazionale di Astrofisica, via La Malfa 153, I. 90146 Palermo, Italy 21 Osservatorio Astrofisico di Torino dell’Istituto Nazionale di Astrofisica, corso Fiume 4, I. 10133 Torino, Italy 22 Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via P. Giuria 1, I. 10125 Torino, Italy 23 Dipartimento di Fisica dell’Universit`a di Torino, Italy, MARI, Stefano Maria, Bartoli, Bruno, Bernardini, P., X. J., Bi, Bolognino, I., Branchini, P., Budano, A., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., D'Al? Staiti, G., D'Amone, A., Danzengluobu, De Mitri, I., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Ding, X. H., Di Sciascio, G., Feng, C. F., Zhaoyang, Feng, Zhenyong, Feng, Galeazzi, F., Giroletti, E., Gou, Q. B., Guo, Y. Q., H. H., He, Haibing, Hu, Hongbo, Hu, Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., Labaciren, H. J., Li, J. Y., Li, X. X., Li, Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., L. L., Ma, X. H., Ma, Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Ruggieri, F., Salvini, P., Santonico, R., Sbano, S. N., Shen, P. R., Sheng, X. D., Shi, F., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., C. Y., Wu, H. R., Wu, Xu, B., Xue, L., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Jilong, Zhang, Jianli, Zhang, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhao, J., Zhaxiciren, Zhaxisangzhu, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., B., Bartoli1, P., Bernardini3, X. J., Bi5, I., Bolognino6, P., Branchini8, A., Budano8, A. K., Calabrese Melcarne9, P., Camarri10, Z., Cao5, R., Cardarelli11, S., Catalanotti1, C., Cattaneo7, S. Z., Chen5, T. L., Chen12, Y., Chen5, P., Creti4, S. W., Cui13, B. Z., Dai14, G., D’Al´ı Staiti15, A., D’Amone3, 4, Danzengluobu12, I., De Mitri3, B., D’Ettorre Piazzoli1, T., Di Girolamo1, X. H., Ding12, G., Di Sciascio11, C. F., Feng17, Zhaoyang, Feng5, Zhenyong, Feng18, F., Galeazzi8, E., Giroletti6, Q. B., Gou5, Y. Q., Guo5, H. H., He5, Haibing, Hu12, Hongbo, Hu5, Q., Huang18, M., Iacovacci1, R., Iuppa10, I., James8, H. Y., Jia18, Labaciren12, H. J., Li12, J. Y., Li17, X. X., Li5, G., Liguori6, C., Liu5, C. Q., Liu14, J., Liu14, M. Y., Liu12, H., Lu5, L. L., Ma5, X. H., Ma5, G., Mancarella3, Mari, Stefano Maria, 8, 19, G., Marsella3, D., Martello3, S., Mastroianni2, Montini8, P., C. C., Ning12, A., Pagliaro16, M., Panareo3, B., Panico10, L., Perrone3, P., Pistilli8, Ruggieri8, F., P., Salvini7, R., Santonico10, S. N., Sbano3, P. R., Shen5, X. D., Sheng5, F., Shi5, A., Surdo4, Y. H., Tan5, P., Vallania21, S., Vernetto21, C., Vigorito22, B., Wang5, H., Wang5, C. Y., Wu5, H. R., Wu5, B., Xu18, L., Xue17, Q. Y., Yang14, X. C., Yang14, Z. G., Yao5, A. F., Yuan12, M., Zha5, H. M., Zhang5, Jilong, Zhang5, Jianli, Zhang5, L., Zhang14, P., Zhang14, X. Y., Zhang17, Y., Zhang5, J., Zhao5, Zhaxiciren12, Zhaxisangzhu12, X. X., Zhou18, F. R., Zhu18, Q. Q., Zhu5, G., Zizzi9 1 Dipartimento di Fisica dell’Universit`a di Napoli 'Federico II, ' Complesso Universitario di Monte, Sant’Angelo, Via, Cinthia, I., 80126 Napoli, Italy, 2 Istituto Nazionale di Fisica Nucleare, Sezione di, Napoli, Complesso Universitario di Monte, Sant’Angelo, Italy 3 Dipartimento Matematica e., Fisica 'Ennio De Giorgi, ' Universit`a del, Salento, via per, Arnesano, I., 73100 Lecce, Italy, 4 Istituto Nazionale di Fisica Nucleare, Sezione di, Lecce, Italy, 5 Key Laboratory of Particle Astrophysic, Institute of High Energy, Physic, Chinese Academy of, Science, P. O., Box 918, 100049, Beijing, China, cn 6 Dipartimento di Fisica dell’Universit`a di Pavia, c. h. e. n. s. z. @. i. h. e. p. a. c., via Bassi, 6, I., 27100 Pavia, Italy, 7 Istituto Nazionale di Fisica Nucleare, Sezione di, Pavia, Italy, 8 Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Tre, via della Vasca Navale, 84, I., 00146 Roma, Italy, 9 Istituto Nazionale di Fisica Nucleare CNAF, Viale Berti Pichat, 6/2, I., 40127 Bologna, Italy 10 Dipartimento di Fisica dell’Universit`a di Roma 'Tor, Vergata, ' via della Ricerca Scientifica, 1, I., 00133 Roma, Italy 11 Istituto Nazionale di Fisica, Nucleare, Sezione di Roma Tor, Vergata, via della Ricerca Scientifica, 1, Italy 12 Tibet, University, 850000, Lhasa, Xizang, China 13 Hebei Normal, University, Shijiazhuang, 050016, Hebei, China 14 Yunnan, University, 2 North Cuihu, Road, 650091, Kunming, Yunnan, China 15 Dipartimento di, Fisica, Universit`a degli Studi di, Palermo, Viale delle, Scienze, Edificio, 18, I., 90128 Palermo, Italy 16 Istituto Nazionale di Fisica, Nucleare, Sezione di, Catania, Viale A., Doria 6, I., 95125 Catania, Italy 17 Shandong, University, 250100, Jinan, Shandong, China 18 Southwest Jiaotong, University, 610031, Chengdu, Sichuan, China 19 Dipartimento di Fisica dell’Universit`a 'Roma, Tre, ' via della Vasca Navale, 84, Italy 20 Istituto di Astrofisica Spaziale e., Fisica Cosmica dell’Istituto Nazionale di Astrofisica, via La Malfa, 153, I., 90146 Palermo, Italy 21 Osservatorio Astrofisico di Torino dell’Istituto Nazionale di, Astrofisica, corso Fiume, 4, I., 10133 Torino, Italy 22 Istituto Nazionale di Fisica, Nucleare, Sezione di, Torino, via P., Giuria 1, I., 10125 Torino, Italy 23 Dipartimento di Fisica dell’Universit`a di, Torino, Italy, B., Bartoli, Bernardini, Paolo, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D'Alí Staiti, D'Amone, Antonio, DE MITRI, Ivan, B., D'Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, F., Galeazzi, E., Giroletti, Q. B., Gou, Y. Q., Guo, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, S. N., Sbano, P. R., Shen, X. D., Sheng, F., Shi, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, B., Xu, L., Xue, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, J., Zhao, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bartoli, B, Bernardini, P, Bi, XJ, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali Staiti, G, D’Amone, A, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, LL, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Ruggieri, F, Salvini, P, Santonico, R, Sbano, SN, Shen, PR, Sheng, XD, Shi, F, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhao, J, Zhou, XX, Zhu, FR, Zhu, QQ, and Zizzi, G
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Range (particle radiation), Photon, Degree (graph theory), 010308 nuclear & particles physics, Settore FIS/01 - Fisica Sperimentale, Gamma ray, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, gamma rays, Wavelength, Settore FIS/05 - Astronomia E Astrofisica, Space and Planetary Science, Coincident, 0103 physical sciences, Gamma Rays, Argo-YBJ, Extended Air Shower Detectors, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, general [gamma rays], Energy (signal processing)
Abstract: We report the observation of a very high energy \gamma-ray source, whose position is coincident with HESS J1841-055. This source has been observed for 4.5 years by the ARGO-YBJ experiment from November 2007 to July 2012. Its emission is detected with a statistical significance of 5.3 standard deviations. Parameterizing the source shape with a two-dimensional Gaussian function we estimate an extension \sigma=(0.40(+0.32,-0.22}) degree, consistent with the HESS measurement. The observed energy spectrum is dN/dE =(9.0-+1.6) x 10^{-13}(E/5 TeV)^{-2.32-+0.23} photons cm^{-2} s^{-1} TeV^{-1}, in the energy range 0.9-50 TeV. The integral \gamma-ray flux above 1 TeV is 1.3-+0.4 Crab units, which is 3.2-+1.0 times the flux derived by HESS. The differences in the flux determination between HESS and ARGO-YBJ, and possible counterparts at other wavelengths are discussed., Comment: 17 pages, 4 figures, have been accepted for publication in ApJ

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