Search

Your search keyword '"D'ALÍ STAITI, G."' showing total 20 results
Start Over Author "D'ALÍ STAITI, G."
20 results on '"D'ALÍ STAITI, G."'

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

Author

Aielli, G., Bacci, C., Bartoli, B., Bernardini, P., Bi, X.J., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A.K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, S., Cattaneo, C., Celio, P., Chen, S.Z., Chen, Y., Cheng, N., Creti, P., Cui, S.W., Dai, B.Z., D’Alí Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., D’Ettorre Piazzoli, B., De Vincenzi, M., Di Girolamo, T., Ding, X.H., Di Sciascio, G., Feng, C.F., Feng, Zhaoyang, Feng, Zhenyong, Galeazzi, F., Galeotti, P., Gargana, R., 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., Liberti, B., Liguori, G., Liu, C., Liu, C.Q., Liu, M.Y., Liu, J., Lu, H., Ma, X.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., Qu, X.B., 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., Wu, C.Y., Wu, H.R., Xu, B., Xue, L., Yan, Y.X., Yang, Q.Y., Yang, X.C., Yuan, A.F., Zha, M., Zhang, H.M., Zhang, JiLong, Zhang, JianLi, Zhang, L., Zhang, P., Zhang, X.Y., Zhang, Y., Zhaxisangzhu, Zhou, X.X., Zhu, F.R., Zhu, Q.Q., and Zizzi, G.

Published
2009
Full Text
View/download PDF

5. Software timing calibration of the ARGO-YBJ detector

Author

Aielli, G., Bacci, C., Bartoli, B., Bernardini, P., Bi, X.J., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A.K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, S., Cattaneo, C., Cavaliere, S., Celio, P., Chen, S.Z., Cheng, N., Creti, P., Cui, S.W., Cusumano, G., Dai, B.Z., D’Alí Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., D’Ettorre Piazzoli, B., De Vincenzi, M., Di Girolamo, T., Ding, X.H., Di Sciascio, G., Feng, C.F., Feng, Zhaoyang, Feng, Zhenyong, Ferrigno, C., Galeazzi, F., Galeotti, P., Gao, X.Y., Gargana, R., Gou, Q.B., He, H.H., Hu, Haibing, Hu, Hongbo, Huang, Q., Iacovacci, M., James, I., Jia, H.Y., Labaciren, Li, H.J., Li, J.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., Nicastro, L., Ning, C.C., Palummo, L., Panareo, M., Perrone, L., Pino, C., Pistilli, P., Qu, X.B., 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., Wu, C.Y., Wu, H.R., Xu, B., Xue, L., Yang, H.T., Yang, Q.Y., Yang, X.C., Yu, G.C., Yuan, A.F., Zha, M., Zhang, H.M., Zhang, J.L., Zhang, L., Zhang, P., Zhang, X.Y., Zhang, Y., Zhaxisangzhu, Zhou, X.X., Zhu, F.R., Zhu, Q.Q., and Zizzi, G.

Published
2009
Full Text
View/download PDF

6. Temperature effect on RPC performance in the ARGO-YBJ experiment

Author

Aielli, G., Bacci, C., Bartoli, B., Bernardini, P., Bi, X.J., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A.K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, S., Cattaneo, C., Celio, P., Chen, S.Z., Chen, Y., Cheng, N., Creti, P., Cui, S.W., Dai, B.Z., D’Alí Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., D’Ettorre Piazzoli, B., De Vincenzi, M., Di Girolamo, T., Ding, X.H., Di Sciascio, G., Feng, C.F., Feng, Zhaoyang, Feng, Zhenyong, Galeazzi, F., Galeotti, P., Gargana, R., 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., Liberti, B., Liguori, G., Liu, C., Liu, C.Q., Liu, M.Y., Liu, J., Lu, H., Ma, X.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., Qu, X.B., 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., Wu, C.Y., Wu, H.R., Xu, B., Xue, L., Yan, Y.X., Yang, Q.Y., Yang, X.C., Yuan, A.F., Zha, M., Zhang, H.M., Zhang, JiLong, Zhang, JianLi, Zhang, L., Zhang, P., Zhang, X.Y., Zhang, Y., Zhaxisangzhu, Zhou, X.X., Zhu, F.R., Zhu, Q.Q., and Zizzi, G.

Published
2009
Full Text
View/download PDF

7. Scaler mode technique for the ARGO-YBJ detector

Author

Aielli, G., Bacci, C., Barone, F., Bartoli, B., Bernardini, P., Bi, X.J., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A.K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, S., Cattaneo, C., Cavaliere, S., Celio, P., Chen, S.Z., Cheng, N., Creti, P., Cui, S.W., Cusumano, G., Dai, B.Z., D’Alí Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., De Rosa, R., D’Ettorre Piazzoli, B., De Vincenzi, M., Di Girolamo, T., Ding, X.H., Di Sciascio, G., Feng, C.F., Feng, Zhaoyang, Feng, Zhenyong, Ferrigno, C., Galeazzi, F., Galeotti, P., Gao, X.Y., Gargana, R., Garufi, F., Gou, Q.B., He, H.H., Hu, Haibing, Hu, Hongbo, Huang, Q., Iacovacci, M., James, I., Jia, H.Y., Labaciren, Li, H.J., Li, J.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., Nicastro, L., Ning, C.C., Palummo, L., Panareo, M., Perrone, L., Pistilli, P., Qu, X.B., 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., Wu, C.Y., Wu, H.R., Xu, B., Xue, L., Yang, H.T., Yang, Q.Y., Yang, X.C., Yu, G.C., Yuan, A.F., Zha, M., Zhang, H.M., Zhang, J.L., Zhang, L., Zhang, P., Zhang, X.Y., Zhang, Y., Zhaxisangzhu, Zhou, X.X., Zhu, F.R., Zhu, Q.Q., and Zizzi, G.

Published
2008
Full Text
View/download PDF

8. The Status of the ARGO Experiment at YBJ

Author

Aielli, G., Bacci, C., Bartoli, B., Bernardini, P., Bi, X.J., Bleve, C., Bussino, S., Calabrese Melcarne, A.K., Camarri, P., Campana, D., Cao, Z., Cardarelli, R., Catalanotti, S., Cavaliere, S., Celio, P., Chen, S.Z., Cheng, N., Creti, P., Cui, S.W., Cusumano, G., Dai, B.Z., Danzengluobu, Ding, X.H., D'Ali Staiti, G., D'Ettorre Piazzoli, B., De Marinis, E., De Mitri, I., De Vincenzi, M., Di Girolamo, T., Di Sciascio, G., Feng, C.F., Feng, Zhaoyang, Feng, Zhenyong, Ferrigno, C., Gao, X.Y., Gou, Q.B., He, H.H., Hu, Hongbo, Hu, Haibing, Huang, Q., Iacovacci, M., James, I., Jia, H.Y., Labaciren, Li, J.Y., Li, H.J., 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., Nicastro, L., Ning, C.C., Palummo, L., Panareo, M., Perrone, L., Pistilli, P., Qu, X.B., Reali, E., Rossi, E., Sacco, B., Saggese, L., Salvini, P., Segreto, A., Santonico, R., Shen, P.R., Sheng, X.D., Shi, F., Stanescu, C., Surdo, A., Tan, Y.H., Vallania, P., Vernetto, S., Wang, H., Wang, Y.G., Wu, C.Y., Xu, B., Xue, L., Yang, H.T., Yang, Q.Y., Yang, X.C., Yu, G.C., Yuan, A.F., Zha, M., Zhang, H.M., Zhang, L., Zhang, P., Zhang, X.Y., Zhang, Y., Zhaxisangzhu, Zhou, X.X., Zhu, F.R., and Zhu, Q.Q.

Published
2007
Full Text
View/download PDF

9. Extensive air showers and diffused Cherenkov light detection: The ULTRA experiment

Author

Agnetta, G., Assis, P., Biondo, B., Brogueira, P., Cappa, A., Catalano, O., Chauvin, J., D’Alí Staiti, G., Dattoli, M., Espirito-Santo, M.C., Fava, L., Galeotti, P., Giarrusso, S., Gugliotta, G., La Rosa, G., Lebrun, D., Maccarone, M.C., Mangano, A., Melo, L., Moreggia, S., Pimenta, M., Russo, F., Saavedra, O., Segreto, A., Silva, J.C., Stassi, P., Tomè, B., Vallania, P., and Vigorito, C.

Published
2007
Full Text
View/download PDF

10. Layout and performance of RPCs used in the Argo-YBJ experiment

Author

Aielli, G., Assiro, R., Bacci, C., Bartoli, B., Bernardini, P., Bi, X.J., Biondo, B., Bleve, C., Bricola, S., Budano, F., Bussino, S., Calabrese Melcarne, A.K., Camarri, P., Campana, D., Cao, Z., Cardarelli, R., Catalanotti, S., Cavaliere, S., Cavalli Sforza, M., Celio, P., Cheng, N., Creti, P., Cusumano, G., Dai, B.Z., D’Alí Staiti, G., Danzengluobu, D’Aquino, B., De Marinis, E., De Mitri, I., D’Ettorre Piazzoli, B., De Vincenzi, M., Di Girolamo, T., Ding, X.H., Di Sciascio, G., Feng, C.F., Feng, Zhaoyang, Feng, Zhenyong, Fratini, K., Gao, X.F., Gou, Q.B., He, H.H., He, M., Hu, Haibing, Hu, Hongbo, Huang, Q., Iacovacci, M., James, I., Jia, H.Y., Labaciren, Li, H.J., Li, J.Y., Liberti, B., Liguori, G., Liu, C.Q., Liu, J., Lu, H., Mancarella, G., Mangano, A., Mari, S.M., Marsella, G., Martello, D., Mastroianni, S., Meng, X.R., Mu, J., Nicastro, L., Ning, C.C., Panareo, M., Pellizzoni, G., Perrone, L., Pino, C., Pinto, C., Pistilli, P., Reali, E., Rossi, E., 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., Wang, H., Wang, Yonggang, Wang, Yungang, Wu, C.Y., Wu, H.R., Xue, L., Yang, H.T., Yang, Q.Y., Yang, X.C., Yu, G.C., Yuan, A.F., Zha, M., Zhang, H.M., Zhang, J.L., Zhang, L., Zhang, N.J., Zhang, P., Zhang, X.Y., Zhang, Y., Zhaxisangzhu, Zhou, X.X., Zhu, F.R., and Zhu, Q.Q.

Published
2006
Full Text
View/download PDF

11. Diffused Cherenkov light measurements for the EUSO project

Author

Vallania, P., Cappa, A., Fava, L., Galeotti, Piero, Saavedra, Oscar, Vigorito, Carlo Francesco, Chauvin, J., Lebrun, D., Moreggia, S., Stassi, P., Assis, P., Brogueira, P., ESPIRITO SANTO, M. C., Melo, L., Pimenta, M., Silva, J. C., Tomé, B., Agnetta, G., Biondo, B., Catalano, O., D'ALÍ STAITI, G., Giarrusso, S., Gugliotta, G., LA ROSA, G., Mangano, A., Russo, F., Scarsi, P., and Zora, M.

Published
2005

14. OBSERVATION OF TeV GAMMA RAYS FROM THE UNIDENTIFIED SOURCE HESS J1841-055 WITH THE ARGO-YBJ EXPERIMENT.

Author

BARTOLI, B., BERNARDINI, P., X. J. BI, BOLOGNINO, I., BRANCHINI, P., BUDANO, A., CALABRESE MELCARNE, A. K., CAMARRI, P., Z. CAO, CARDARELLI, R., CATALANOTTI, S., CATTANEO, C., S. Z. CHEN, T. L. CHEN, Y. CHEN, CRETI, P., S. W. CUI, B. Z. DAI, D'ALÍ STAITI, G., and D'AMONE, A.

Subjects
PHOTONS, GAMMA rays, GAUSSIAN function, WAVELENGTHS, DISTRIBUTION (Probability theory)
Abstract

We report the observation of a very high energy а -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 2007 November to 2012 July. 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 σ = (0.40+0.32 -0.22)°, which is consistent with the HESS measurement. The observed energy spectrum is dN/dE = (9.0 ± 1.6) × 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 а -ray flux above 1 TeV is 1.3 ± 0.4 Crab, 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. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

15. ARGO-YBJ detects a VHE gamma-ray flare from Mrk501

Author

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., D Alí Staiti, G., Danzengluobu, Dattoli, M., Mitri, I., Piazzoli, B. D. Ettorre, Di Girolamo, T., Ding, X. H., Di Sciascio, G., Feng, C. F., Feng, Zhaoyang, Feng, Zhenyong, Galeazzi, F., 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, 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., Silvia Teresa Vernetto, 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., and Argo-Ybj, Collaboration

16. Detection of the Cherenkov light diffused by sea water with the ULTRA experiment

Author

Agnetta, G., Assis, P., Biondo, B., Brogueira, P., Cappa, A., Catalano, O., Chauvin, J., D Alí Staiti, G., Dattoli, M., Espirito-Santo, M. C., Fava, L., Galeotti, P., SALVATORE GIARRUSSO, Gugliotta, G., La Rosa, G., Lebrun, D., Maccarone, M. C., Mangano, A., Melo, L., Moreggia, S., Pimenta, M., Russo, F., Saavedra, O., Segreto, A., Silva, J. C., Stassi, P., Tomé, B., Vallania, P., Vigorito, C., bibliotheque, LPSC, Rogelio Caballero, Juan Carlos D'Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Rogelio Caballero, Juan Carlos D'Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia, ULTRA, THE ULTRA COLLABORATION AGNETTA G, ASSIS P, BIONDO B, BROGUEIRA P, CAPPA, CATALANO O, CHAUVIN J, D'ALI' STAITI G, DATTOLI M, ESPIRITO SANTO MC, FAVA L, GALEOTTI P, GIARRUSSO S, GUGLIOTTA G, LA ROSA G, LEBRUN D, MACCARONE MC, MANGANO A, MELO L, MOREGGIA S, PIMENTA M, RUSSO F, SAAVEDRA O, SEGRETO A, SILVA J C, STASSI P, TOME' B, VALLANIA P, and VIGORITO C

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Abstract

The study of Ultra High Energy Cosmic Rays represents one of the most challenging topic in the Cosmic Rays and in the Astroparticle Physics fields. The interaction of primary particles with atmospheric nuclei produces a huge Extensive Air Shower together with isotropic emission of UV fluorescence light and highly directional Cherenkov photons, that are reflected/diffused isotropically by the impact on the Earth's surface or on high optical depth clouds. For space-based observations, detecting the reflected Cherenkov signal in a delayed coincidence with the fluorescence light improves the accuracy of the shower reconstruction in space and in particular the measurement of the shower maximum, giving a strong signature for discriminating hadrons and neutrinos, and helping to estimate the primary chemical composition. Since the Earth's surface is mostly covered by water, the ULTRA (UV Light Transmission and Reflection in the Atmosphere)experiment has been designed to provide the diffusing properties of sea water, overcoming the lack of information in this specific field. A small EAS array, made up of 5 particle detectors, and an UV optical device, have been coupled to detect in coincidence both electromagnetic and UV components. The detector was in operation from May to December, 2005, in a small private harbor in Capo Granitola (Italy); the results of these measurements in terms of diffusion coefficient and threshold energy are presented here., 4 pages, 3 figures, PDF format, Proceedings of 30th ICRC, International Cosmic Ray Conference 2007, Merida, Yucatan, Mexico, 3-11 July 2007

17. LONG-TERM MONITORING OF MRK 501 FOR ITS VERY HIGH ENERGY γ EMISSION AND A FLARE IN 2011 OCTOBER.

Author

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., and D'Alí Staiti, G.

Subjects
BL Lacertae objects, GALACTIC nuclei, SPECTRAL energy distribution, SPECTRUM analysis, GALAXIES, ASTROPHYSICS research, GAMMA rays
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. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
View/download PDF

18. 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

19. Long-term monitoring of the TeV emission from Mrk 421 with the ARGO-YBJ experiment

Author

Collaboration, The ARGO-YBJ, Bartoli, B., Bernardini, P., Bi, X. J., Bleve, C., Bolognino, I., Branchini, P., Budano, A., Melcarne, A. K. Calabrese, Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, S., Cattaneo, C., Celio, P., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., Staiti, G. D'Alí, Danzengluobu, Dattoli, M., De Mitri, I., Piazzoli, B. D'Ettorre, Di Girolamo, T., Ding, X. H., Di Sciascio, G., Feng, C. F., Feng, Zhaoyang, Feng, Zhenyong, Galeazzi, F., Galeotti, P., 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, 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., Rossi, E., 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, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, 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'Alí Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng CF, Feng, XYa, Feng, ZYo, Galeazzi, F, Galeotti, P, 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, 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, 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, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, 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, L, Zhang, Xy, Zhaxiciren, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Oggetti di tipo BL Lacertae, FOS: Physical sciences, Flux, Astrophysics, 01 natural sciences, 7. Clean energy, individual (Markarian 421) [BL Lacertae objects], Spectral line, Gamma-rays, Markarian 421, BL Lacertae, Resistive Plate Chambers, law.invention, law, 0103 physical sciences, Radiative transfer, 010303 astronomy & astrophysics, media_common, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Markarian 421, Settore FIS/01 - Fisica Sperimentale, Astronomy and Astrophysics, general [gamma ray], Synchrotron, 3. Good health, Air shower, 13. Climate action, Space and Planetary Science, Duty cycle, Sky, Raggi gamma, Spectral energy distribution, Astrophysics - High Energy Astrophysical Phenomena
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 continuously monitors 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 2007 November to 2010 February. This source was observed by the satellite-borne experiments Rossi X-ray Timing Explorer and Swift in the X-ray band. Mrk 421 was especially active 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 between the X-ray and gamma-ray photons longer than 1 day is found. The evolution of the spectral energy distribution is investigated by measuring spectral 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., 30 pages, 8 figures

Published
2011

20. 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

Catalog

Books, media, physical & digital resources
See catalog results