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1. Periodic Gamma-ray Modulation of the blazar PG 1553+113 Confirmed by Fermi-LAT and Multi-wavelength Observations

Author: Abdollahi, S., Baldini, L., Barbiellini, G., Bellazzini, R., Berenji, B., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caraveo, P. A., Casaburo, F., Cavazzuti, E., Cheung, C. C., Chiaro, G., Ciprini, S., Cozzolongo, G., Orestano, P. Cristarella, Cutini, S., D'Ammando, F., Di Lalla, N., Dirirsa, F., Di Venere, L., Domínguez, A., Fegan, S. J., Ferrara, E. C., Fiori, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Garrappa, S., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Hays, E., Horan, D., Kuss, M., Larsson, S., Laurenti, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Maldera, S., Malyshev, D., Manfreda, A., Marcotulli, L., Martí-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perri, M., Persic, M., Pesce-Rollins, M., Porter, T. A., Principe, G., Rainò, S., Rando, R., Rani, B., Razzano, M., Reimer, A., Reimer, O., Parkinson, P. M. Saz, Scotton, L., Serini, D., Sesana, A., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, M. N., Tak, D., Thayer, J. B., Thompson, D. J., Torres, D. F., Valverde, J., Verrecchia, F., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: A 2.1-year periodic oscillation of the gamma-ray flux from the blazar PG 1553+113 has previously been tentatively identified in almost 7 year of data from the Fermi Large Area Telescope. After 15 years of Fermi sky-survey observations, doubling the total time range, we report >7 cycle gamma-ray modulation with an estimated significance of 4 sigma against stochastic red noise. Independent determinations of oscillation period and phase in the earlier and the new data are in close agreement (chance probability <0.01). Pulse timing over the full light curve is also consistent with a coherent periodicity. Multiwavelength new data from Swift X-Ray Telescope, Burst Alert Telescope, and UVOT, and from KAIT, Catalina Sky Survey, All-Sky Automated Survey for Supernovae, and Owens Valley Radio Observatory ground-based observatories as well as archival Rossi X-Ray Timing Explorer satellite-All Sky Monitor data, published optical data of Tuorla, and optical historical Harvard plates data are included in our work. Optical and radio light curves show clear correlations with the gamma-ray modulation, possibly with a nonconstant time lag for the radio flux. We interpret the gamma-ray periodicity as possibly arising from a pulsational accretion flow in a sub-parsec binary supermassive black hole system of elevated mass ratio, with orbital modulation of the supplied material and energy in the jet. Other astrophysical scenarios introduced include instabilities, disk and jet precession, rotation or nutation, and perturbations by massive stars or intermediate-mass black holes in polar orbit., Comment: 23 pages, 14 figures, 20 plots, 1 table, accepted and published by The Astrophysical Journal. Article produced by the Fermi Large Area Telescope (LAT) Collaboration
Published: 2025
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2. Search for Extended GeV Sources in the Inner Galactic Plane

Author: Abdollahi, S., Acero, F., Acharyya, A., Adelfio, A., Ajello, M., Baldini, L., Ballet, J., Bartolini, C., Gonzalez, J. Becerra, Bellazzini, R., Bissaldi, E., Bonino, R., Bruel, P., Cameron, R. A., Caraveo, P. A., Castro, D., Cavazzuti, E., Cheung, C. C., Cibrario, N., Ciprini, S., Cozzolongo, G., Orestano, P. Cristarella, Cuoco, A., Cutini, S., D'Ammando, F., Di Lalla, N., Dinesh, A., Di Venere, L., Domínguez, A., Fiori, A., Funk, S., Fusco, P., Gargano, F., Gasbarra, C., Gasparrini, D., Germani, S., Giacchino, F., Giglietto, N., Giliberti, M., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guillemot, L., Guiriec, S., Gupta, R., Hashizume, M., Hays, E., Hewitt, J. W., Horan, D., Hou, X., Kayanoki, T., Kuss, M., Laviron, A., Lemoine-Goumard, M., Liguori, A., Li, J., Liodakis, I., Loizzo, P., Longo, F., Loparco, F., Lorusso, L., Lovellette, M. N., Lubrano, P., Maldera, S., Malyshev, D., Martí-Devesa, G., Martin, P., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monti-Guarnieri, P., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paneque, D., Panzarini, G., Persic, M., Pesce-Rollins, M., Pillera, R., Porter, T. A., Rainò, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Bernal, M. Rocamora, Sánchez-Conde, M., Parkinson, P. M. Saz, Serini, D., Sgrò, C., Siskind, E. J., Smith, D. A., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Tajima, H., Thayer, J. B., Torres, D. F., Valverde, J., Wadiasingh, Z., Wood, K., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The recent detection of extended $\gamma$-ray emission around middle-aged pulsars is interpreted as inverse-Compton scattering of ambient photons by electron-positron pairs escaping the pulsar wind nebula, which are confined near the system by unclear mechanisms. This emerging population of $\gamma$-ray sources was first discovered at TeV energies and remains underexplored in the GeV range. To address this, we conducted a systematic search for extended sources along the Galactic plane using 14 years of Fermi-LAT data above 10 GeV, aiming to identify a number of pulsar halo candidates and extend our view to lower energies. The search covered the inner Galactic plane ($\lvert l\rvert\leq$ 100$^{\circ}$, $\lvert b\rvert\leq$ 1$^{\circ}$) and the positions of known TeV sources and bright pulsars, yielding broader astrophysical interest. We found 40 such sources, forming the Second Fermi Galactic Extended Sources Catalog (2FGES), most with 68% containment radii smaller than 1.0$^{\circ}$ and relatively hard spectra with photon indices below 2.5. We assessed detection robustness using field-specific alternative interstellar emission models and by inspecting significance maps. Noting 13 sources previously known as extended in the 4FGL-DR3 catalog and five dubious sources from complex regions, we report 22 newly detected extended sources above 10 GeV. Of these, 13 coincide with H.E.S.S., HAWC, or LHAASO sources; six coincide with bright pulsars (including four also coincident with TeV sources); six are associated with 4FGL point sources only; and one has no association in the scanned catalogs. Notably, six to eight sources may be related to pulsars as classical pulsar wind nebulae or pulsar halos., Comment: 43 pages, 17 figures, 11 tables
Published: 2024

3. GRB 221009A: the B.O.A.T Burst that Shines in Gamma Rays

Author: Axelsson, M., Ajello, M., Arimoto, M., Baldini, L., Ballet, J., Baring, M. G., Bartolini, C., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Berenji, B., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Cheung, C. C., Chiaro, G., Cibrario, N., Ciprini, S., Cozzolongo, G., Orestano, P. Cristarella, Crnogorcevic, M., Cuoco, A., Cutini, S., D'Ammando, F., De Gaetano, S., Di Lalla, N., Dinesh, A., Di Tria, R., Di Venere, L., Domínguez, A., Fegan, S. J., Ferrara, E. C., Fiori, A., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Galanti, G., Gargano, F., Gasbarra, C., Germani, S., Giacchino, F., Giglietto, N., Giliberti, M., Gill, R., Giordano, F., Giroletti, M., Granot, J., Green, D., Grenier, I. A., Guiriec, S., Gustafsson, M., Hashizume, M., Hays, E., Hewitt, J. W., Horan, D., Kayanoki, T., Kuss, M., Laviron, A., Li, J., Liodakis, I., Longo, F., Loparco, F., Lorusso, L., Lott, B., Lovellette, M. N., Lubrano, P., Maldera, S., Malyshev, D., Manfreda, A., Martí-Devesa, G., Martinelli, R., Castellanos, I. Martinez, Mazziotta, M. N., McEnery, J. E., Mereu, I., Meyer, M., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monti-Guarnieri, P., Monzani, M. E., Morishita, T., Morselli, A., Moskalenko, I. V., Negro, M., Niwa, R., Omodei, N., Orienti, M., Orlando, E., Paneque, D., Panzarini, G., Persic, M., Pesce-Rollins, M., Petrosian, V., Pillera, R., Piron, F., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Ryde, F., Sánchez-Conde, M., Parkinson, P. M. Saz, Serini, D., Sgrò, C., Sharma, V., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Tak, D., Thayer, J. B., Torres, D. F., Valverde, J., Zaharijas, G., Lesage, S., Briggs, M. S., Burns, E., Bala, S., Bhat, P. N., Cleveland, W. H., Dalessi, S., de Barra, C., Gibby, M., Giles, M. M., Hamburg, R., Hristov, B. A., Hui, C. M., Kocevski, D., Mailyan, B., Malacaria, C., McBreen, S., Poolakkil, S., Roberts, O. J., Scotton, L., Veres, P., von Kienlin, A., Wilson-Hodge, C. A., and Wood, J.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present a complete analysis of Fermi Large Area Telescope (LAT) data of GRB 221009A, the brightest Gamma-Ray Burst (GRB) ever detected. The burst emission above 30 MeV detected by the LAT preceded by 1 s the low-energy (< 10 MeV) pulse that triggered the Fermi Gamma-Ray Burst Monitor (GBM), as has been observed in other GRBs. The prompt phase of GRB 221009A lasted a few hundred seconds. It was so bright that we identify a Bad Time Interval (BTI) of 64 seconds caused by the extremely high flux of hard X-rays and soft gamma rays, during which the event reconstruction efficiency was poor and the dead time fraction quite high. The late-time emission decayed as a power law, but the extrapolation of the late-time emission during the first 450 seconds suggests that the afterglow started during the prompt emission. We also found that high-energy events observed by the LAT are incompatible with synchrotron origin, and, during the prompt emission, are more likely related to an extra component identified as synchrotron self-Compton (SSC). A remarkable 400 GeV photon, detected by the LAT 33 ks after the GBM trigger and directionally consistent with the location of GRB 221009A, is hard to explain as a product of SSC or TeV electromagnetic cascades, and the process responsible for its origin is uncertain. Because of its proximity and energetic nature, GRB 221009A is an extremely rare event., Comment: 60 pages, 38 figures, 9 tables
Published: 2024

4. Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode

Author: Algaba, J. C., Balokovic, M., Chandra, S., Cheong, W. Y., Cui, Y. Z., D'Ammando, F., Falcone, A. D., Ford, N. M., Giroletti, M., Goddi, C., Gurwell, M. A., Hada, K., Haggard, D., Jorstad, S., Kaur, A., Kawashima, T., Kerby, S., Kim, J. Y., Kino, M., Kravchenko, E. V., Lee, S. S., Lu, R. S., Markoff, S., Michail, J., Neilsen, J., Nowak, M. A., Principe, G., Ramakrishnan, V., Ripperda, B., Sasada, M., Savchenko, S. S., Sheridan, C., Akiyama, K., Alberdi, A., Alef, W., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. -K., Ball, D., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Carlstrom, J. E., Chael, A., Chan, C. -K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. -T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Dihingia, I. K., Doeleman, S. S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., García, R., Gentaz, O., Georgiev, B., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. -W. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., Jiménez-Rosales, A., Johnson, M. D., Jones, A. C., Joshi, A. V., Jung, T., Karuppusamy, R., Keating, G. K., Kettenis, M., Kim, D. -J., Kim, J., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Krichbaum, T. P., Kuo, C. -Y., La Bella, N., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. -P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., MacDonald, N. R., Mao, J., Marchili, N., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Montgomery, J., Moran, J. M., Moriyama, K., Moscibrodzka, M., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Myserlis, I., Nagai, H., Nagar, N. M., Nair, D. G., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. Navarro, Ni, C., Oh, J., Okino, H., Olivares, H., Oyama, T., Özel, F., Palumbo, D. C. M., Paraschos, G. Filippos, Park, J., Parsons, H., Patel, N., Pen, U. -L., Pesce, D. W., Piétu, V., PopStefanija, A., Porth, O., Prather, B., Psaltis, D., Pu, H. -Y., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Roelofs, F., Romero-Cañizales, C., Ros, E., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez, S., Sánchez-Argüelles, D., Sánchez-Portal, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K. -F., Shao, L., Shen, Z., Small, D., Sohn, B. W., SooHoo, J., Salas, L. D. Sosapanta, Souccar, K., Stanway, J. S., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Toma, K., Torne, P., Toscano, T., Traianou, E., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Weintroub, J., Wharton, R., Wielgus, M., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Young, A., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. -F., Zensus, J. A., Zhang, S., Zhao, G. -Y., Zhao, S. -S., Bellazzini, R., Berenji, B., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cheung, C. C., Ciprini, S., Orestano, P. Cristarella, Cutini, S., Di Lalla, N., Dinesh, A., Di Venere, L., Domínguez, A., Fegan, S. J., Franckowiak, A., Fukazawa, Y., Fusco, P., Gargano, F., Gasbarra, C., Germani, S., Giliberti, M., Grenier, I. A., Hays, E., Horan, D., Kuss, M., Larsson, S., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Maldera, S., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Negro, M., Omodei, N., Orlando, E., Persic, M., Rainò, S., Rani, B., Reimer, A., Reimer, O., Sánchez-Conde, M., Parkinson, P. M. Saz, Sgrò, C., Siskind, E. J., Spinelli, P., Suson, D. J., Tajima, H., Torres, D. F., Zaharijas, G., Aharonian, F., Benkhali, F. Ait, Aschersleben, J., Ashkar, H., Backes, M., Martins, V. Barbosa, Batzofin, R., Becherini, Y., Berge, D., Böttcher, M., Boisson, C., Bolmont, J., de Lavergne, M. de Bony, Borowska, J., Bouyahiaoui, M., Bradascio, F., Brose, R., Brown, A., Bruno, B., Bulik, T., Burger-Scheidlin, C., Casanova, S., Cecil, R., Celic, J., Cerruti, M., Chand, T., Chen, A., Chibueze, J., Chibueze, O., Czerny, T., Dainotti, M., Dubus, F., Dumm, J., D'Urso, G., Drouhin, A., Durouchoux, P., Fabbian, D., Franczak, D., Funk, M., Gabanyi, J., Gaggero, G., Garcia, N., Geiger, A., Giorgi, M. G., Gleeson, S., Gonzalez, S., Gauthier, G. T., Grasso, P., Hovatta, T., Hyman, J., Kaaret, C., Kirk, D., Lal, S., Lesch, T. M., Lohmann, K., Massaro, C., Mayer, M., Meintjes, P. J., Miral, E., Mirra, A., Neronov, J., Padovani, E., Paccagnella, F., Parisi, E., Piotrowska, A., Pohl, S., Puga, G., Ramirez, L. R., Reville, S., Rowell, D. S., Rudge, M., Rybka, G., Schlenstedt, M. S., Seo, E. S., Svirski, J., Taylor, J. R., Torres, F., Tsujimoto, K., Tosti, F., Volpi, S., Walraven, N. A., Welker, L., Zietkiewicz, M., Abdalla, G., Aleva, C., Benkhali, H. A. Ait, Aldous, M., Amin, M., Aschieri, M. A., de Deus, E., Santos, J. de Los, Fontanot, D., Jorfi, S., Levens, P., Zwart, A. E. E., Oliviero, S., Puglisi, D., Thiel, M., Zaharijas, C., Amaral, F., Boella, L., Holincheck, L., Queiroz, R., Sofue, H., Tellis, G., Wagner, G., Wierzcholska, A., Zacharias, M., Zdziarski, A. A., Zech, A., Zywucka, N., Abe, S., Abhir, J., Abhishek, A., Acciari, V. A., Aguasca-Cabot, A., Agudo, I., Aniello, T., Ansoldi, S., Antonelli, L. A., Engels, A. Arbet, Arcaro, C., Artero, M., Asano, K., Babic, A., de Almeida, U. Barres, Barrio, J. A., Batkovic, I., Bautista, A., Baxter, J., González, J. Becerra, Bednarek, W., Bernardini, E., Bernete, J., Berti, A., Besenrieder, J., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Bronzini, E., Burelli, I., Busetto, G., Campoy-Ordaz, A., Carosi, A., Carosi, R., Carretero-Castrillo, M., Castro-Tirado, A. J., Cerasole, D., Ceribella, G., Chai, Y., Cifuentes, A., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Amico, G., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., de Menezes, R., Delfino, M., Delgado, J., Mendez, C. Delgado, Di Pierro, F., Di Tria, R., Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Escudero, J., Fariña, L., Fattorini, A., Foffano, L., Font, L., Fröse, S., Fukami, S., López, R. J. García, Garczarczyk, M., Gasparyan, S., Gaug, M., Paiva, J. G. Giesbrecht, Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Gradetzke, T., Grau, R., Green, D., Green, J. G., Günther, P., Hadasch, D., Hahn, A., Hassan, T., Heckmann, L., Llorente, J. Herrera, Hrupec, D., Imazawa, R., Ishio, K., Martínez, I. Jiménez, Jormanainen, J., Kayanoki, T., Kerszberg, D., Kluge, G. W., Kobayashi, Y., Kouch, P. M., Kubo, H., Kushida, J., Laínez, M., Lamastra, A., Leone, F., Lindfors, E., Lombardi, S., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Lorini, A., Lyard, E., Fraga, B. Machado de Oliveira, Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mangano, S., Mannheim, K., Mariotti, M., Martínez, M., Martínez-Chicharro, M., Mas-Aguilar, A., Mazin, D., Menchiari, S., Mender, S., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., González, M. Molero, Molina, E., Mondal, H. A., Moralejo, A., Morcuende, D., Nakamori, T., Nanci, C., Neustroev, V., Nickel, L., Rosillo, M. Nievas, Nigro, C., Nikolic, L., Nilsson, K., Nishijima, K., Ekoume, T. Njoh, Noda, K., Nozaki, S., Ohtani, Y., Okumura, A., Otero-Santos, J., Paiano, S., Paneque, D., Paoletti, R., Paredes, J. M., Peresano, M., Pihet, M., Pirola, G., Podobnik, F., Moroni, P. G. Prada, Prandini, E., Priyadarshi, C., Ribó, M., Rico, J., Righi, C., Sahakyan, N., Saito, T., Saturni, F. G., Schmidt, K., Schmuckermaier, F., Schubert, J. L., Schweizer, T., Sciaccaluga, A., Silvestri, G., Sitarek, J., Sliusar, V., Sobczynska, D., Spolon, A., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Suutarinen, S., Takahashi, M., Takeishi, R., Tavecchio, F., Temnikov, P., Terauchi, K., Terzic, T., Teshima, M., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Acosta, M. Vazquez, Ventura, S., Verna, G., Viale, I., Vigorito, C. F., Vitale, V., Vovk, I., Walter, R., Will, M., Wunderlich, C., Yamamoto, T., Acharyya, A., Adams, C. B., Bangale, P., Bartkoske, J. T., Benbow, W., Christiansen, J. L., Duerr, A., Errando, M., Feng, Q., Foote, G. M., Fortson, L., Furniss, A., Hanlon, W., Hervet, O., Hinrichs, C. E., Holder, J., Humensky, T. B., Jin, W., Johnson, M. N., Kaaret, P., Kertzman, M., Kieda, D., Kleiner, T. K., Korzoun, N., Krennrich, F., Kumar, S., Lang, M. J., Lundy, M., Maier, G., McGrath, C. E., Millard, M. J., Mooney, C. L., Moriarty, P., Mukherjee, R., Ning, W., O'Brien, S., Ong, R. A., Pohl, M., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Ribeiro, D., Roache, E., Ryan, J. L., Sadeh, I., Saha, L., Santander, M., Sembroski, G. H., Shang, R., Splettstoesser, M., Talluri, A. K., Tucci, J. V., Valverde, J., Vassiliev, V. V., Williams, D. A., Wong, S. L., Chen, Z., Cui, L., Hirota, T., Li, B., Li, G., Liu, Q., Liu, X., Liu, Z., Ma, J., Niinuma, K., Ro, H., Sakai, N., Sawada-Satoh, S., Wajima, K., Wang, J., Wang, N., Xia, B., Yan, H., Yonekura, Y., Zhang, H., Zhao, R., Zhong, W., group, The Event Horizon Telescope - Multi-wavelength science working, Collaboration, The Event Horizon Telescope, Collaboration, The Fermi Large Area Telescope, Collaboration, H. E. S. S., Collaboration, MAGIC, Collaboration, VERITAS, and Collaboration, EAVN
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract: The nearby elliptical galaxy M87 contains one of the only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (EHT). In 2018, more than two dozen multi-wavelength (MWL) facilities (from radio to gamma-ray energies) took part in the second M87 EHT campaign. The goal of this extensive MWL campaign was to better understand the physics of the accreting black hole M87*, the relationship between the inflow and inner jets, and the high-energy particle acceleration. Understanding the complex astrophysics is also a necessary first step towards performing further tests of general relativity. The MWL campaign took place in April 2018, overlapping with the EHT M87* observations. We present a new, contemporaneous spectral energy distribution (SED) ranging from radio to very high energy (VHE) gamma-rays, as well as details of the individual observations and light curves. We also conduct phenomenological modelling to investigate the basic source properties. We present the first VHE gamma-ray flare from M87 detected since 2010. The flux above 350 GeV has more than doubled within a period of about 36 hours. We find that the X-ray flux is enhanced by about a factor of two compared to 2017, while the radio and millimetre core fluxes are consistent between 2017 and 2018. We detect evidence for a monotonically increasing jet position angle that corresponds to variations in the bright spot of the EHT image. Our results show the value of continued MWL monitoring together with precision imaging for addressing the origins of high-energy particle acceleration. While we cannot currently pinpoint the precise location where such acceleration takes place, the new VHE gamma-ray flare already presents a challenge to simple one-zone leptonic emission model approaches, and emphasises the need for combined image and spectral modelling., Comment: 46 pages, 23 figures, accepted by Astronomy & Astrophysics on August. 29, 2024
Published: 2024
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5. Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow

Author: Lesage, S., Veres, P., Briggs, M. S., Goldstein, A., Kocevski, D., Burns, E., Wilson-Hodge, C. A., Bhat, P. N., Huppenkothen, D., Fryer, C. L., Hamburg, R., Racusin, J., Bissaldi, E., Cleveland, W. H., Dalessi, S., Fletcher, C., Giles, M. M., Hristov, B. A., Hui, C. M., Mailyan, B., Malacaria, C., Poolakkil, S., Roberts, O. J., von Kienlin, A., Wood, J., Ajello, M., Arimoto, M., Baldini, L., Ballet, J., Baring, M. G., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chiaro, G., Cibrario, N., Ciprini, S., Orestano, P. Cristarella, Crnogorcevic, M., Cuoco, A., Cutini, S., DAmmando, F., De Gaetano, S., Di Lalla, N., Di Venere, L., Dominguez, A., Fegan, S. J., Ferrara, E. C., Fleischhack, H., Fukazawa, Y., Funk, S., Fusco, P., Galanti, G., Gammaldi, V., Gargano, F., Gasbarra, C., Gasparrini, D., Germani, S., Giacchino, F., Giglietto, N., Gill, R., Giroletti, M., Granot, J., Green, D., Grenier, I. A., Guiriec, S., Gustafsson, M., Hays, E., Hewitt, J. W., Horan, D., Hou, X., Kuss, M., Latronico, L., Laviron, A., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lorusso, L., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., McEnery, J. E., Mereu, I., Meyer, M., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panzarini, G., Persic, M., Pesce-Rollins, M., Pillera, R., Piron, F., Poon, H., Porter, T. A., Principe, G., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Ryde, F., Sanchez-Conde, M., Parkinson, P. M. Saz, Scotton, L., Serini, D., Sgro, C., Sharma, V., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Torres, D. F., Valverde, J., Venters, T., Wadiasingh, Z., Wood, K., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report the discovery of GRB 221009A, the highest flux gamma-ray burst ever observed by the Fermi Gamma-ray Burst Monitor (GBM). This GRB has continuous prompt emission lasting more than 600 seconds which smoothly transitions to afterglow visible in the GBM energy range (8 keV--40 MeV), and total energetics higher than any other burst in the GBM sample. By using a variety of new and existing analysis techniques we probe the spectral and temporal evolution of GRB 221009A. We find no emission prior to the GBM trigger time (t0; 2022 October 9 at 13:16:59.99 UTC), indicating that this is the time of prompt emission onset. The triggering pulse exhibits distinct spectral and temporal properties suggestive of the thermal, photospheric emission of shock-breakout, with significant emission up to $\sim$15 MeV. We characterize the onset of external shock at t0+600 s and find evidence of a plateau region in the early-afterglow phase which transitions to a slope consistent with Swift-XRT afterglow measurements. We place the total energetics of GRB 221009A in context with the rest of the GBM sample and find that this GRB has the highest total isotropic-equivalent energy ($\textrm{E}_{\gamma,\textrm{iso}}=1.0\times10^{55}$ erg) and second highest isotropic-equivalent luminosity ($\textrm{L}_{\gamma,\textrm{iso}}=9.9\times10^{53}$ erg/s) based on redshift of z = 0.151. These extreme energetics are what allowed us to observe the continuously emitting central engine of GBM from the beginning of the prompt emission phase through the onset of early afterglow., Comment: 26 pages 7 figures - accepted for publication in ApJL
Published: 2023
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6. The Fermi-LAT Light Curve Repository

Author: Abdollahi, S., Ajello, M., Baldini, L., Ballet, J., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Berretta, A., Bissaldi, E., Bonino, R., Brill, A., Bruel, P., Burns, E., Buson, S., Cameron, A., Caputo, R., Caraveo, P. A., Cibrario, N., Ciprini, S., Orestano, P. Cristarella, Crnogorcevic, M., Cutini, S., D'Ammando, F., De Gaetano, S., Digel, S. W., Di Lalla, N., Di Venere, L., Domínguez, A., Ramazani, V. Fallah, Fegan, S. J., Ferrara, E. C., Fiori, A., Fleischhack, H., Franckowiak, A., Fukazawa, Y., Fusco, P., Gammaldi, V., Gargano, F., Garrappa, S., Gasbarra, C., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Gustafsson, M., Hays, E., Horan, D., Hou, X., Jóhannesson, G., Kerr, M., Kocevski, D., Kuss, M., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lorusso, L., Lott, B., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Mart\'-Devesa, G., Mazziotta, M. N., Mereu, I., Meyer, M., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panzarini, G., Perkins, J. S., Persic, M., Pesce-Rollins, M., Pillera, R., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Sánchez-Conde, M., Parkinson, P. M. Saz, Scargle, Jeff, Scotton, L., Serini, D., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Thompson, D. J., Torres, D. F., Valverde, J., Venters, T., Wadiasingh, Z., Wagner, S., and Wood, K.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Fermi Large Area Telescope (LAT) light curve repository (LCR) is a publicly available, continually updated library of gamma-ray light curves of variable Fermi-LAT sources generated over multiple timescales. The Fermi-LAT LCR aims to provide publication-quality light curves binned on timescales of 3 days, 7 days, and 30 days for 1525 sources deemed variable in the source catalog of the first 10 years of Fermi-LAT observations. The repository consists of light curves generated through full likelihood analyses that model the sources and the surrounding region, providing fluxes and photon indices for each time bin. The LCR is intended as a resource for the time-domain and multi-messenger communities by allowing users to quickly search LAT data to identify correlated variability and flaring emission episodes from gamma-ray sources. We describe the sample selection and analysis employed by the LCR and provide an overview of the associated data access portal., Comment: Accepted for publication in ApJ Supplement Series
Published: 2023
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7. Fermi-LAT Gamma-ray Detection of the Recurrent Nova RS Ophiuchi during its 2021 Outburst

Author: Cheung, C. C., Johnson, T. J., Jean, P., Kerr, M., Page, K. L., Osborne, J. P., Beardmore, A. P., Sokolovsky, K. V., Teyssier, F., Ciprini, S., Marti-Devesa, G., Mereu, I., Razzaque, S., Wood, K. S., Shore, S. N., Korotkiy, S., Levina, A., and Blumenzweig, A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report the Fermi-LAT gamma-ray detection of the 2021 outburst of the symbiotic recurrent nova RS Ophiuchi. In this system, unlike classical novae from cataclysmic binaries, the ejecta from the white dwarf form shocks when interacting with the dense circumstellar wind environment of the red giant companion. We find the LAT spectra from 50 MeV to ~20-23 GeV, the highest-energy photons detected in some sub-intervals, are consistent with $\pi^{\rm 0}$-decay emission from shocks in the ejecta as proposed by Tatischeff & Hernanz (2007) for its previous 2006 outburst. The LAT light-curve displayed a fast rise to its peak >0.1 GeV flux of $\simeq$6x10^-6 ph cm^-2 s^-1 beginning on day 0.745 after its optically-constrained eruption epoch of 2021 August 8.50. The peak lasted for ~1 day, and exhibited a power-law decline up to the final LAT detection on day 45. We analyze the data on shorter timescales at early times and found evidence of an approximate doubling of emission over ~200 minutes at day 2.2, possibly indicating a localized shock-acceleration event. Comparing the data collected by the AAVSO, we measured a constant ratio of ~2.8x10^-3 between the gamma-ray and optical luminosities except for a ~5x smaller ratio within the first day of the eruption likely indicating attenuation of gamma rays by ejecta material and lower high-energy proton fluxes at the earliest stages of the shock development. The hard X-ray emission due to bremsstrahlung from shock-heated gas traced by the Swift-XRT 2-10 keV light-curve peaked at day ~6, later than at GeV and optical energies. Using X-ray derived temperatures to constrain the velocity profile, we find the hadronic model reproduces the observed >0.1 GeV light-curve., Comment: ApJ, accepted. 21 pages, 10 figures, 4 tables
Published: 2022
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8. Search for new cosmic-ray acceleration sites within the 4FGL catalog Galactic plane sources

Author: Collaboration, Fermi-LAT, Abdollahi, S., Acero, F., Ackermann, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Castro, D., Chiaro, G., Cibrario, N., Ciprini, S., Coronado-Blázquez, J., Crnogorcevic, M., Cutini, S., D'Ammando, F., De Gaetano, S., Di Lalla, N., Dirirsa, F., Di Venere, L., Domínguez, A., Fegan, S. J., Fiori, A., Fleischhack, H., Franckowiak, A., Fukazawa, Y., Fusco, P., Gammaldi, V., Gargano, F., Gasparrini, D., Giacchino, F., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Green, D., Grenier, I. A., Grondin, M. -H., Guiriec, S., Gustafsson, M., Harding, A. K., Hays, E., Hewitt, J. W., Horan, D., Hou, X., Jóhannesson, G., Kayanoki, T., Kerr, M., Kuss, M., Larsson, S., Latronico, L., Lemoine-Goumard, M., Li, J., Longo, F., Loparco, F., Lubrano, P., Maldera, S., Malyshev, D., Manfreda, A., Martí-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Pillera, R., Poon, H., Porter, T. A., Principe, G., Rainò, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Sánchez-Conde, M., Parkinson, P. M. Saz, Scotton, L., Serini, D., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Sueoka, K., Suson, D. J., Tajima, H., Tak, D., Thayer, J. B., Torres, D. F., Troja, E., Valverde, J., Wadiasingh, Z., Wood, K., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Cosmic rays are mostly composed of protons accelerated to relativistic speeds. When those protons encounter interstellar material, they produce neutral pions which in turn decay into gamma rays. This offers a compelling way to identify the acceleration sites of protons. A characteristic hadronic spectrum, with a low-energy break around 200 MeV, was detected in the gamma-ray spectra of four Supernova Remnants (SNRs), IC 443, W44, W49B and W51C, with the Fermi Large Area Telescope. This detection provided direct evidence that cosmic-ray protons are (re-)accelerated in SNRs. Here, we present a comprehensive search for low-energy spectral breaks among 311 4FGL catalog sources located within 5 degrees from the Galactic plane. Using 8 years of data from the Fermi Large Area Telescope between 50 MeV and 1 GeV, we find and present the spectral characteristics of 56 sources with a spectral break confirmed by a thorough study of systematic uncertainty. Our population of sources includes 13 SNRs for which the proton-proton interaction is enhanced by the dense target material; the high-mass gamma-ray binary LS~I +61 303; the colliding wind binary eta Carinae; and the Cygnus star-forming region. This analysis better constrains the origin of the gamma-ray emission and enlarges our view to potential new cosmic-ray acceleration sites., Comment: Accepted for publication in The Astrophysical Journal
Published: 2022
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9. A Gamma-ray Pulsar Timing Array Constrains the Nanohertz Gravitational Wave Background

Author: Ajello, M., Atwood, W. B., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bhattacharyya, B., Bissaldi, E., Blandford, R. D., Bloom, E., Bonino, R., Bruel, P., Buehler, R., Burns, E., Buson, S., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cibrario, N., Ciprini, S., Clark, C. J., Cognard, I., Coronado-Blázquez, J., Crnogorcevic, M., Cromartie, H., Crowter, K., Cutini, S., D'Ammando, F., Gaetano, S. D., Palma, F. d., Digel, S. W., Lalla, N. D., Dirirsa, F. Fan., Venere, L. D., Domínguez, A., Ferrara, E. C., Fiori, A., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gammaldi, V., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guillemot, L., Guiriec, S., Gustafsson, M., Harding, A. K., Hays, E., Hewitt, J. W., Horan, D., Hou, X., Jóhannesson, G., Keith, M. J., Kerr, M., Kramer, M., Kuss, M., Larsson, S., Latronico, L., Li, J., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Martí-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Negro, M., Nieder, L., Ojha, R., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Parthasarathy, A., Pei, Z., Persic, M., Pesce-Rollins, M., Pillera, R., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Ransom, S. M., Ray, P. S., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Roy, J., Sánchez-Conde, M., Parkinson, P. M. Sa., Scargle, J., Scotton, L., Serini, D., Sgrò, C., Siskind, E. J., Smith, D. A., Spandre, G., Spiewak, R., Spinelli, P., Stairs, I., Suson, D. J., Swihart, S. J., Tabassum, S., Thayer, J. B., Theureau, G., Torres, D. F., Troja, E., Valverde, J., Wadiasingh, Z., Wood, K., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: After large galaxies merge, their central supermassive black holes are expected to form binary systems whose orbital motion generates a gravitational wave background (GWB) at nanohertz frequencies. Searches for this background utilize pulsar timing arrays, which perform long-term monitoring of millisecond pulsars (MSPs) at radio wavelengths. We use 12.5 years of Fermi Large Area Telescope data to form a gamma-ray pulsar timing array. Results from 35 bright gamma-ray pulsars place a 95\% credible limit on the GWB characteristic strain of $1.0\times10^{-14}$ at 1 yr$^{-1}$, which scales as the observing time span $t_{\mathrm{obs}}^{-13/6}$. This direct measurement provides an independent probe of the GWB while offering a check on radio noise models., Comment: 3 figures in the main text. 3 figures and 8 tables are in the supplementary material
Published: 2022
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10. Fermi Large Area Telescope Performance After 10 Years Of Operation

Author: The Fermi LAT Collaboration, Ajello, M., Atwood, W. B., Axelsson, M., Bagagli, R., Bagni, M., Baldini, L., Bastieri, D., Bellardi, F., Bellazzini, R., Bissaldi, E., Bloom, E. D., Bonino, R., Bregeon, J., Brez, A., Bruel, P., Buehler, R., Buson, S., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Ceccanti, M., Chen, S., Cheung, C. C., Ciprini, S., Cognard, I., Cohen-Tanugi, J., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Digel, S. W., Dirirsa, F., Di Lalla, N., Di Venere, L., Domínguez, A., Fabiani, D., Ferrara, E. C., Fiori, A., Foglia, G., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Giroletti, M., Glanzman, T., Green, D., Griffin, S., Grondin, M. -H., Grove, J. E., Guillemot, L., Guiriec, S., Gustafsson, M., Hays, E., Horan, D., Jóhannesson, G., Johnson, T. J., Kamae, T., Kerr, M., Kuss, M., Larsson, S., Latronico, L., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Martí-Devesa, G., Mazziotta, M. N., Menon, N., Mereu, I., Meyer, M., Michelson, P. F., Minuti, M., Mitthumsiri, W., Mizuno, T., Mongelli, M., Monzani, M. E., Moskalenko, I. V., Negro, M., Nuss, E., Ojha, R., Orienti, M., Orlando, E., Paccagnella, A., Paliya, V. S., Paneque, D., Pei, Z., Perkins, J. S., Pesce-Rollins, M., Pinchera, M., Piron, F., Poon, H., Porter, T. A., Primavera, R., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Rapposelli, E., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Russell, J. J., Saggini, N., Parkinson, P. M. Saz, Scolieri, N., Serini, D., Sgrò, C., Siskind, E. J., Smith, D. A., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Valverde, J., Vigiani, L., and Zaharijas, G.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The Large Area Telescope (LAT), the primary instrument for the Fermi Gamma-ray Space Telescope (Fermi) mission, is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering the energy range from 30 MeV to more than 300 GeV. We describe the performance of the instrument at the 10-year milestone. LAT performance remains well within the specifications defined during the planning phase, validating the design choices and supporting the compelling case to extend the duration of the Fermi mission. The details provided here will be useful when designing the next generation of high-energy gamma-ray observatories., Comment: 60 pages, 28 figures. Published in ApJS
Published: 2021
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11. Artificial Neural Network Classification of 4FGL Sources

Author: Germani, S., Tosti, G., Lubrano, ., Cutini, S., Mereu, I., and Berretta, A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Fermi-LAT DR1 and DR2 4FGL catalogues feature more than 5000 gamma-ray sources of which about one fourth are not associated with already known objects, and approximately one third are associated with blazars of uncertain nature. We perform a three-category classification of the 4FGL DR1 and DR2 sources independently, using an ensemble of Artificial Neural Networks (ANNs) to characterise them based on the likelihood of being a Pulsar (PSR), a BL Lac type blazar (BLL) or a Flat Spectrum Radio Quasar (FSRQ). We identify candidate PSR, BLL and FSRQ among the unassociated sources with approximate equipartition among the three categories and select ten classification outliers as potentially interesting for follow up studies., Comment: 10 pages, 11 figures
Published: 2021
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12. Catalog of Long-Term Transient Sources in the First 10 Years of Fermi-LAT Data

Author: Baldini, L., Ballet, J., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buson, S., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciangottini, D., Ciprini, S., Orestano, P. Cristarella, Crnogorcevic, M., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Digel, S. W., Di Lalla, N., Dirirsa, F., Di Venere, L., Domínguez, A., Fiori, A., Fleischhack, H., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Griffin, S., Guiriec, S., Gustafsson, M., Hewitt, J. W., Horan, D., Imazawa, R., Jóhannesson, G., Kerr, M., Kocevski, D., Kuss, M., Larsson, S., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Martí-Devesa, G., Matake, H., Mazziotta, M. N., Mereu, I., Meyer, M., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nagasawa, S., Negro, M., Ojha, R., Orienti, M., Orlando, E., Palatiello, M., Paliya, V., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Parkinson, P. M. Saz, Scotton, L., Serini, D., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Tak, D., Torres, D. F., Tosti, G., Troja, E., Wood, K., Yassine, M., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present the first Fermi Large Area Telescope (LAT) catalog of long-term $\gamma$-ray transient sources (1FLT). This comprises sources that were detected on monthly time intervals during the first decade of Fermi-LAT operations. The monthly time scale allows us to identify transient and variable sources that were not yet reported in other Fermi-LAT catalogs. The monthly datasets were analyzed using a wavelet-based source detection algorithm that provided the candidate new transient sources. The search was limited to the extragalactic regions of the sky to avoid the dominance of the Galactic diffuse emission at low Galactic latitudes. The transient candidates were then analyzed using the standard Fermi-LAT Maximum Likelihood analysis method. All sources detected with a statistical significance above 4$\sigma$ in at least one monthly bin were listed in the final catalog. The 1FLT catalog contains 142 transient $\gamma$-ray sources that are not included in the 4FGL-DR2 catalog. Many of these sources (102) have been confidently associated with Active Galactic Nuclei (AGN): 24 are associated with Flat Spectrum Radio Quasars; 1 with a BL Lac object; 70 with Blazars of Uncertain Type; 3 with Radio Galaxies; 1 with a Compact Steep Spectrum radio source; 1 with a Steep Spectrum Radio Quasar; 2 with AGN of other types. The remaining 40 sources have no candidate counterparts at other wavelengths. The median $\gamma$-ray spectral index of the 1FLT-AGN sources is softer than that reported in the latest Fermi-LAT AGN general catalog. This result is consistent with the hypothesis that detection of the softest $\gamma$-ray emitters is less efficient when the data are integrated over year-long intervals., Comment: 41 pages, 17 figures, 7 tables; Accepted by ApJS on 24 May 2021; Contact Authors: I. Mereu, S. Cutini, E. Cavazzuti, G. Tosti
Published: 2021
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13. The First Fermi-LAT Solar Flare Catalog

Author: Ajello, M., Baldini, L., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Cavazzuti, E., Cheung, C. C., Chiaro, G., Costantin, D., Cutini, S., D'Ammando, F., de Palma, F., Desiante, R., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giordano, F., Giroletti, M., Green, D., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Johannesson, G., Kovacevic, M., Kuss, M., Larsson, S., Latronico, L., Li, J., Longo, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tak, D., Troja, E., Valverde, J., Wood, K., and Zaharijas, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract: We present the first Fermi - Large Area Telescope (LAT) solar flare catalog covering the 24 th solar cycle. This catalog contains 45 Fermi -LAT solar flares (FLSFs) with emission in the gamma-ray energy band (30 MeV - 10 GeV) detected with a significance greater than 5 sigma over the years 2010-2018. A subsample containing 37 of these flares exhibit delayed emission beyond the prompt-impulsive hard X-ray phase with 21 flares showing delayed emission lasting more than two hours. No prompt-impulsive emission is detected in four of these flares. We also present in this catalog the observations of GeV emission from 3 flares originating from Active Regions located behind the limb (BTL) of the visible solar disk. We report the light curves, spectra, best proton index and localization (when possible) for all the FLSFs. The gamma-ray spectra is consistent with the decay of pions produced by >300 MeV protons. This work contains the largest sample of high-energy gamma-ray flares ever reported and provides the unique opportunity to perform population studies on the different phases of the flare and thus allowing to open a new window in solar physics., Comment: Published in ApJS
Published: 2021
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14. Fermi and Swift Observations of GRB 190114C: Tracing the Evolution of High-Energy Emission from Prompt to Afterglow

Author: Ajello, M., Arimoto, M., Axelsson, M., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Burns, E., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costantin, D., Cutini, S., D'Ammando, F., DeKlotz, M., Luque, P. de la Torre, de Palma, F., Desai, A., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Gill, R., Giordano, F., Giroletti, M., Granot, J., Green, D., Grenier, I. A., Grondin, M. H., Guiriec, S., Hays, E., Horan, D., Jóhannesson, G., Kocevski, D., Kovac'evic', M., Kuss, M., Larsson, S., Latronico, L., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Malyshev, D., Manfreda, A., Martí-Devesa, G., Mazziotta, M. N., McEnery, J. E., Mereu, I., Meyer, M., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Ryde, F., Parkinson, P. M. Saz, Serini, D., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Takagi, K., Takahashi, M. N., Tak, D., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Valverde, J., Van Klaveren, B., Wood, K., Yassine, M., Zaharijas, G., Bhat, P. N., Briggs, M. S., Cleveland, W., Giles, M., Goldstein, A., Hui, M., Malacaria, C., Preece, R., Roberts, O., Veres, P., von Kienlin, A., Cenko, S. B., O'Brien, P., Beardmore, A. P., Lien, A., Osborne, J. P., Tohuvavohu, A., D'Elia, V., D'A, A., Perri, M., Gropp, J., Klingler, N., Capalbi, M., Tagliaferri, G., and Stamatikos, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report on the observations of gamma-ray burst (GRB) 190114C by the Fermi Gamma-ray Space Telescope and the Neil Gehrels Swift Observatory. The early-time observations reveal multiple emission components that evolve independently, with a delayed power-law component that exhibits significant spectral attenuation above 40 MeV in the first few seconds of the burst. This power-law component transitions to a harder spectrum that is consistent with the afterglow emission observed at later times. This afterglow component is clearly identifiable in the GBM and BAT light curves as a slowly fading emission component on which the rest of the prompt emission is superimposed. As a result, we are able to constrain the transition from internal shock to external shock dominated emission. We find that the temporal and spectral evolution of the broadband afterglow emission can be well modeled as synchrotron emission from a forward shock propagating into a wind-like circumstellar environment and find that high-energy photons observed by Fermi LAT are in tension with the theoretical maximum energy that can be achieved through synchrotron emission from a shock. These violations of the maximum synchrotron energy are further compounded by the detection of very high energy (VHE) emission above 300 GeV by MAGIC concurrent with our observations. We conclude that the observations of VHE photons from GRB 190114C necessitates either an additional emission mechanism at very high energies that is hidden in the synchrotron component in the LAT energy range, an acceleration mechanism that imparts energy to the particles at a rate that is faster than the electron synchrotron energy loss rate, or revisions of the fundamental assumptions used in estimating the maximum photon energy attainable through the synchrotron process., Comment: 24 pages, 9 figures, Accepted to ApJ
Published: 2019
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15. MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources

Author: Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., de Almeida, U. Barres, Barrio, J. A., González, J. Becerra, Bednarek, W., Bernardini, E., Berse, R. Ch., Berti, A., Bhattacharyya, W., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Ramazani, V. Fallah, Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., López, R. J. García, Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Rosillo, M. Nievas, Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Persic, M., Moroni, P. G. Prada, Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takahashi, M., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Treves, A., Tsujimoto, S., Vanzo, G., Acosta, M. Vazquez, Vovk, I., Ward, J. E., Will, M., Zarić, D., Albert, A., Alfaro, R., Alvarez, C., Arceo, R., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Becerril, A., Belmont-Moreno, E., BenZvi, S. Y., Bernal, A., Braun, J., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Castillo, M., Cotti, U., Cotzomi, J., de León, S. Coutiño, De León, C., De la Fuente, E., Hernandez, R. Diaz, Dichiara, S., Dingus, B. L., DuVernois, M. A., Díaz-Vélez, J. C., Ellsworth, R. W., Engel, K., Enriquez-Rivera, O., Fiorino, D. W., Fleischhack, H., Fraija, N., García-González, J. A., Garfias, F., González-Muñoz, A., González, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hueyotl-Zahuantitla, F., Hui, C. M., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Lara, A., Lauer, R. J., Lee, W. H., Lennarz, D., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Luna-García, R., López-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pelayo, R., Pretz, J., Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Greus, F. Salesa, Sandoval, A., Schneider, M., Arroyo, M. Seglar, Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, I., Tibolla, O., Tollefson, K., Torres, I., Ukwatta, T. N., Vianello, G., Villaseñor, L., Werner, F., Westerhoff, S., Wood, J., Yapici, T., Yodh, G., Zepeda, A., Zhou, H., Álvarez, J. D., Ajello, M., Baldini, L., Barbiellini, G., Berenji, B., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Brandt, T. J., Bregeon, J., Bruel, P., Cameron, R. A., Caputo, R., Caraveo, P. A., Castro, D., Cavazzuti, E., Chiaro, G., Ciprini, S., Costantin, D., D'Ammando, F., de Palma, F., Desai, A., Di Lalla, N., Di Mauro, M., Di Venere, L., Favuzzi, C., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Green, D., Grenier, I. A., Guiriec, S., Harding, A. K., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, G., Kuss, M., Larsson, S., Liodakis, I., Loparco, F., Lubrano, P., Magill, J. D., Maldera, S., Manfreda, A., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Palatiello, M., Paliya, V. S., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Rainò, S., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Thayer, J. B., Thompson, D. J., Torres, D. F., Torresi, E., Troja, E., Valverde, J., Wood, K., and Yassine, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The HAWC Collaboration released the 2HWC catalog of TeV sources, in which 19 show no association with any known high-energy (HE; E > 10 GeV) or very-high-energy (VHE; E > 300 GeV) sources. This catalog motivated follow-up studies by both the MAGIC and Fermi-LAT observatories with the aim of investigating gamma-ray emission over a broad energy band. In this paper, we report the results from the first joint work between HAWC, MAGIC and Fermi-LAT on three unassociated HAWC sources: 2HWC J2006+341, 2HWC J1907+084* and 2HWC J1852+013*. Although no significant detection was found in the HE and VHE regimes, this investigation shows that a minimum 1 degree extension (at 95% confidence level) and harder spectrum in the GeV than the one extrapolated from HAWC results are required in the case of 2HWC J1852+013*, while a simply minimum extension of 0.16 degrees (at 95% confidence level) can already explain the scenario proposed by HAWC for the remaining sources. Moreover, the hypothesis that these sources are pulsar wind nebulae is also investigated in detail., Comment: 12 pages, 3 figures. Accepted for publication in MNRAS
Published: 2019
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16. Unresolved Gamma-Ray Sky through its Angular Power Spectrum

Author: Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Burns, E., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Costantin, D., Cuoco, A., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Desai, A., Digel, S. W., Di Lalla, N., Di Mauro, M., Di Venere, L., Dirirsa, F. Fana, Favuzzi, C., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guillemot, L., Guiriec, S., Horan, D., Johannesson, G., Kuss, M., Larsson, S., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lubrano, P., Magill, J. D., Maldera, S., Malyshev, D., Manfreda, A., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, M., Thayer, J. B., Tibaldo, L., Torres, D. F., Troja, E., Venters, T. M., Vianello, G., Wood, K., Yassine, M., Zaharijas, G., Ammazzalorso, S., Fornengo, N., and Regis, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology
Abstract: The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi large area telescope (LAT), allowing us to resolve and understand the high-energy Universe. The nature of the remaining unresolved emission (unresolved gamma-ray background, UGRB) below the LAT source detection threshold can be uncovered by characterizing the amplitude and angular scale of the UGRB fluctuation field. This work presents a measurement of the UGRB autocorrelation angular power spectrum based on eight years of Fermi LAT Pass 8 data products. The analysis is designed to be robust against contamination from resolved sources and noise systematics. The sensitivity to subthreshold sources is greatly enhanced with respect to previous measurements. We find evidence (with $\sim$3.7$\sigma$ significance) that the scenario in which two classes of sources contribute to the UGRB signal is favored over a single class. A double power law with exponential cutoff can explain the anisotropy energy spectrum well, with photon indices of the two populations being 2.55 $\pm$ 0.23 and 1.86 $\pm$ 0.15., Comment: 8 + 12 (SOM) pages, Contact author: Michela Negro (michela.negro@to.infn.it). (Typos in Tab. VII in previous versions)
Published: 2018
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17. The Third Fermi Large Area Telescope Catalog of Gamma-Ray Pulsars

Author: Smith, D. A., primary, Abdollahi, S., additional, Ajello, M., additional, Bailes, M., additional, Baldini, L., additional, Ballet, J., additional, Baring, M. G., additional, Bassa, C., additional, Gonzalez, J. Becerra, additional, Bellazzini, R., additional, Berretta, A., additional, Bhattacharyya, B., additional, Bissaldi, E., additional, Bonino, R., additional, Bottacini, E., additional, Bregeon, J., additional, Bruel, P., additional, Burgay, M., additional, Burnett, T. H., additional, Cameron, R. A., additional, Camilo, F., additional, Caputo, R., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Chiaro, G., additional, Ciprini, S., additional, Clark, C. J., additional, Cognard, I., additional, Corongiu, A., additional, Orestano, P. Cristarella, additional, Crnogorcevic, M., additional, Cuoco, A., additional, Cutini, S., additional, D’Ammando, F., additional, de Angelis, A., additional, DeCesar, M. E., additional, De Gaetano, S., additional, de Menezes, R., additional, Deneva, J., additional, de Palma, F., additional, Di Lalla, N., additional, Dirirsa, F., additional, Di Venere, L., additional, Domínguez, A., additional, Dumora, D., additional, Fegan, S. J., additional, Ferrara, E. C., additional, Fiori, A., additional, Fleischhack, H., additional, Flynn, C., additional, Franckowiak, A., additional, Freire, P. C. C., additional, Fukazawa, Y., additional, Fusco, P., additional, Galanti, G., additional, Gammaldi, V., additional, Gargano, F., additional, Gasparrini, D., additional, Giacchino, F., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Guillemot, L., additional, Guiriec, S., additional, Gustafsson, M., additional, Harding, A. K., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Hou, X., additional, Jankowski, F., additional, Johnson, R. P., additional, Johnson, T. J., additional, Johnston, S., additional, Kataoka, J., additional, Keith, M. J., additional, Kerr, M., additional, Kramer, M., additional, Kuss, M., additional, Latronico, L., additional, Lee, S.-H., additional, Li, D., additional, Li, J., additional, Limyansky, B., additional, Longo, F., additional, Loparco, F., additional, Lorusso, L., additional, Lovellette, M. N., additional, Lower, M., additional, Lubrano, P., additional, Lyne, A. G., additional, Maan, Y., additional, Maldera, S., additional, Manchester, R. N., additional, Manfreda, A., additional, Marelli, M., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mereu, I., additional, Michelson, P. F., additional, Mickaliger, M., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Moiseev, A. A., additional, Monzani, M. E., additional, Morselli, A., additional, Negro, M., additional, Nemmen, R., additional, Nieder, L., additional, Nuss, E., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Palatiello, M., additional, Paneque, D., additional, Panzarini, G., additional, Parthasarathy, A., additional, Persic, M., additional, Pesce-Rollins, M., additional, Pillera, R., additional, Poon, H., additional, Porter, T. A., additional, Possenti, A., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Ransom, S. M., additional, Ray, P. S., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Renault-Tinacci, N., additional, Romani, R. W., additional, Sánchez-Conde, M., additional, Parkinson, P. M. Saz, additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Shannon, R., additional, Sharma, V., additional, Shen, Z., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Stappers, B. W., additional, Stephens, T. E., additional, Suson, D. J., additional, Tabassum, S., additional, Tajima, H., additional, Tak, D., additional, Theureau, G., additional, Thompson, D. J., additional, Tibolla, O., additional, Torres, D. F., additional, Valverde, J., additional, Venter, C., additional, Wadiasingh, Z., additional, Wang, N., additional, Wang, P., additional, Weltevrede, P., additional, Wood, K., additional, Yan, J., additional, Zaharijas, G., additional, Zhang, C., additional, and Zhu, W., additional
Published: 2023
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18. Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow

Author: Lesage, S., primary, Veres, P., additional, Briggs, M. S., additional, Goldstein, A., additional, Kocevski, D., additional, Burns, E., additional, Wilson-Hodge, C. A., additional, Bhat, P. N., additional, Huppenkothen, D., additional, Fryer, C. L., additional, Hamburg, R., additional, Racusin, J., additional, Bissaldi, E., additional, Cleveland, W. H., additional, Dalessi, S., additional, Fletcher, C., additional, Giles, M. M., additional, Hristov, B. A., additional, Hui, C. M., additional, Mailyan, B., additional, Malacaria, C., additional, Poolakkil, S., additional, Roberts, O. J., additional, von Kienlin, A., additional, Wood, J., additional, Ajello, M., additional, Arimoto, M., additional, Baldini, L., additional, Ballet, J., additional, Baring, M. G., additional, Bastieri, D., additional, Gonzalez, J. Becerra, additional, Bellazzini, R., additional, Blandford, R. D., additional, Bonino, R., additional, Bruel, P., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Chiaro, G., additional, Cibrario, N., additional, Ciprini, S., additional, Orestano, P. Cristarella, additional, Crnogorcevic, M., additional, Cuoco, A., additional, Cutini, S., additional, D’Ammando, F., additional, De Gaetano, S., additional, Di Lalla, N., additional, Di Venere, L., additional, Domínguez, A., additional, Fegan, S. J., additional, Ferrara, E. C., additional, Fleischhack, H., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Galanti, G., additional, Gammaldi, V., additional, Gargano, F., additional, Gasbarra, C., additional, Gasparrini, D., additional, Germani, S., additional, Giacchino, F., additional, Giglietto, N., additional, Gill, R., additional, Giroletti, M., additional, Granot, J., additional, Green, D., additional, Grenier, I. A., additional, Guiriec, S., additional, Gustafsson, M., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Hou, X., additional, Kuss, M., additional, Latronico, L., additional, Laviron, A., additional, Lemoine-Goumard, M., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lorusso, L., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Omodei, N., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Panzarini, G., additional, Persic, M., additional, Pesce-Rollins, M., additional, Pillera, R., additional, Piron, F., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Ryde, F., additional, Sánchez-Conde, M., additional, Parkinson, P. M. Saz, additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Sharma, V., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Tajima, H., additional, Torres, D. F., additional, Valverde, J., additional, Venters, T., additional, Wadiasingh, Z., additional, Wood, K., additional, and Zaharijas, G., additional
Published: 2023
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19. The Fermi-LAT Lightcurve Repository*

Author: Abdollahi, S., primary, Ajello, M., additional, Baldini, L., additional, Ballet, J., additional, Bastieri, D., additional, Becerra Gonzalez, J., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Bonino, R., additional, Brill, A., additional, Bruel, P., additional, Burns, E., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Cibrario, N., additional, Ciprini, S., additional, Cristarella Orestano, P., additional, Crnogorcevic, M., additional, Cutini, S., additional, D’Ammando, F., additional, De Gaetano, S., additional, Digel, S. W., additional, Di Lalla, N., additional, Di Venere, L., additional, Domínguez, A., additional, Ramazani, V. Fallah, additional, Fegan, S. J., additional, Ferrara, E. C., additional, Fiori, A., additional, Fleischhack, H., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Fusco, P., additional, Gammaldi, V., additional, Gargano, F., additional, Garrappa, S., additional, Gasbarra, C., additional, Gasparrini, D., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Guiriec, S., additional, Gustafsson, M., additional, Hays, E., additional, Horan, D., additional, Hou, X., additional, Jóhannesson, G., additional, Kerr, M., additional, Kocevski, D., additional, Kuss, M., additional, Latronico, L., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lorusso, L., additional, Lott, B., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Omodei, N., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Panzarini, G., additional, Perkins, J. S., additional, Persic, M., additional, Pesce-Rollins, M., additional, Pillera, R., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Sánchez-Conde, M., additional, Parkinson, P. M. Saz, additional, Scargle, Jeff, additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tajima, H., additional, Thompson, D. J., additional, Torres, D. F., additional, Valverde, J., additional, Venters, T., additional, Wadiasingh, Z., additional, Wagner, S., additional, and Wood, K., additional
Published: 2023
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20. The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3

Author: Ajello, M., primary, Baldini, L., additional, Ballet, J., additional, Bastieri, D., additional, Becerra Gonzalez, J., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Bonino, R., additional, Brill, A., additional, Bruel, P., additional, Buson, S., additional, Caputo, R., additional, Caraveo, P. A., additional, Cheung, C. C., additional, Chiaro, G., additional, Cibrario, N., additional, Ciprini, S., additional, Crnogorcevic, M., additional, Cutini, S., additional, D’Ammando, F., additional, De Gaetano, S., additional, Di Lalla, N., additional, Di Venere, L., additional, Domínguez, A., additional, Ramazani, V. Fallah, additional, Ferrara, E. C., additional, Fiori, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gammaldi, V., additional, Gargano, F., additional, Garrappa, S., additional, Gasparrini, D., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Guiriec, S., additional, Horan, D., additional, Hou, X., additional, Kayanoki, T., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Lewis, T., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lott, B., additional, Lovellette, M. N., additional, Lubrano, P., additional, Madejski, G. M., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Michelson, P. F., additional, Mirabal, N., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Ojha, R., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Pei, Z., additional, Peña-Herazo, H., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Pillera, R., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tajima, H., additional, Torres, D. F., additional, Valverde, J., additional, Yassin, H., additional, and Zaharijas, G., additional
Published: 2022
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21. Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data

Author: Fermi-Lat Collaboration, T., Baldini, L., Ballet, J., Bastieri, D., Becerra Gonzalez, J., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buson, S., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciangottini, D., Cibario, N., Ciprini, S., Cristarella Orestano, P., Crnogorcevic, M., Cutini, S., D'Ammando, F., De La Torre Luque, P., De Palma, F., Digel, S. W., Di Lalla, N., Dirirsa, F., Di Venere, L., Dominguez, A., Fiori, A., Fleischhack, H., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Griffin, S., Guiriec, S., Gustafsson, M., Hewitt, J. W., Horan, D., Imazawa, R., Johannesson, G., Kerr, M., Kocevski, D., Kuss, M., Larsson, S., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Matake, H., Mazziotta, M. N., Mereu, I., Meyer, M., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nagasawa, S., Negro, M., Ojha, R., Orienti, M., Orlando, E., Palatiello, M., Paliya, V., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Rain, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Saz Parkinson, P. M., Scotton, L., Serini, D., Sgr, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Tak, D., Torres, D. F., Tosti, G., Troja, E., Wood, K., Yassine, M., Zaharijas, G., Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Particules de Montpellier (LUPM), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Fermi-LAT, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Baldini, L, Ballet, J, Bastieri, D, Gonzalez, Jb, Bellazzini, R, Berretta, A, Bissaldi, E, Blandford, Rd, Bloom, Ed, Bonino, R, Bottacini, E, Bruel, P, Buson, S, Cameron, Ra, Caraveo, Pa, Cavazzuti, E, Chen, S, Chiaro, G, Ciangottini, D, Cibario, N, Ciprini, S, Orestano, Pc, Crnogorcevic, M, Cutini, S, D'Ammando, F, Luque, Pd, de Palma, F, Digel, Sw, Di Lalla, N, Dirirsa, F, Di Venere, L, Dominguez, A, Fiori, A, Fleischhack, H, Franckowiak, A, Fukazawa, Y, Funk, S, Fusco, P, Gargano, F, Gasparrini, D, Germani, S, Giglietto, N, Giordano, F, Giroletti, M, Green, D, Grenier, Ia, Griffin, S, Guiriec, S, Gustafsson, M, Hewitt, Jw, Horan, D, Imazawa, R, Johannesson, G, Kerr, M, Kocevski, D, Kuss, M, Larsson, S, Latronico, L, Li, J, Liodakis, I, Longo, F, Loparco, F, Lovellette, Mn, Lubrano, P, Maldera, S, Manfreda, A, Marti-Devesa, G, Matake, H, Mazziotta, Mn, Mereu, I, Meyer, M, Mirabal, N, Mitthumsiri, W, Mizuno, T, Monzani, Me, Morselli, A, Moskalenko, Iv, Nagasawa, S, Negro, M, Ojha, R, Orienti, M, Orlando, E, Palatiello, M, Paliya, V, Paneque, D, Pei, Z, Persic, M, Pesce-Rollins, M, Petrosian, V, Poon, H, Porter, Ta, Principe, G, Racusin, Jl, Raino, S, Rando, R, Rani, B, Razzano, M, Razzaque, S, Reimer, A, Reimer, O, Parkinson, Pm, Scotton, L, Serini, D, Sgro, C, Siskind, Ej, Spandre, G, Spinelli, P, Suson, Dj, Tajima, H, Tak, D, Torres, Df, Tosti, G, Troja, E, Wood, K, Yassine, M, Zaharijas, G, Fermi-Lat Collaboration, T., Baldini, L., Ballet, J., Bastieri, D., Becerra Gonzalez, J., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buson, S., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciangottini, D., Cibario, N., Ciprini, S., Cristarella Orestano, P., Crnogorcevic, M., Cutini, S., D'Ammando, F., De La Torre Luque, P., De Palma, F., Digel, S. W., Di Lalla, N., Dirirsa, F., Di Venere, L., Dominguez, A., Fiori, A., Fleischhack, H., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Griffin, S., Guiriec, S., Gustafsson, M., Hewitt, J. W., Horan, D., Imazawa, R., Johannesson, G., Kerr, M., Kocevski, D., Kuss, M., Larsson, S., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Matake, H., Mazziotta, M. N., Mereu, I., Meyer, M., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nagasawa, S., Negro, M., Ojha, R., Orienti, M., Orlando, E., Palatiello, M., Paliya, V., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Rain, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Saz Parkinson, P. M., Scotton, L., Serini, D., Sgr, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Tak, D., Torres, D. F., Tosti, G., Troja, E., Wood, K., Yassine, M., and Zaharijas, G.
Subjects: Gamma ray transients, gamma-ray astronomy, Active galactic nucleus, Solar gamma-ray emission, 010504 meteorology & atmospheric sciences, Radio galaxy, media_common.quotation_subject, Gamma-ray telescopes, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Gamma-ray transient sources, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, Quasars, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, media_common, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Spectral index, Active galactic nuclei, Gamma-ray sources, Astronomy and Astrophysics, Quasar, Gamma ray transient, Space and Planetary Science, Sky, Solar flares, Gamma-ray bursts, Catalogs, Astrophysics - High Energy Astrophysical Phenomena, Gamma-rays, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], High energy astrophysics, Blazars, BL Lac object, Fermi Gamma-ray Space Telescope
Abstract: We present the first Fermi Large Area Telescope (LAT) catalog of long-term $\gamma$-ray transient sources (1FLT). This comprises sources that were detected on monthly time intervals during the first decade of Fermi-LAT operations. The monthly time scale allows us to identify transient and variable sources that were not yet reported in other Fermi-LAT catalogs. The monthly datasets were analyzed using a wavelet-based source detection algorithm that provided the candidate new transient sources. The search was limited to the extragalactic regions of the sky to avoid the dominance of the Galactic diffuse emission at low Galactic latitudes. The transient candidates were then analyzed using the standard Fermi-LAT Maximum Likelihood analysis method. All sources detected with a statistical significance above 4$\sigma$ in at least one monthly bin were listed in the final catalog. The 1FLT catalog contains 142 transient $\gamma$-ray sources that are not included in the 4FGL-DR2 catalog. Many of these sources (102) have been confidently associated with Active Galactic Nuclei (AGN): 24 are associated with Flat Spectrum Radio Quasars; 1 with a BL Lac object; 70 with Blazars of Uncertain Type; 3 with Radio Galaxies; 1 with a Compact Steep Spectrum radio source; 1 with a Steep Spectrum Radio Quasar; 2 with AGN of other types. The remaining 40 sources have no candidate counterparts at other wavelengths. The median $\gamma$-ray spectral index of the 1FLT-AGN sources is softer than that reported in the latest Fermi-LAT AGN general catalog. This result is consistent with the hypothesis that detection of the softest $\gamma$-ray emitters is less efficient when the data are integrated over year-long intervals., Comment: 41 pages, 17 figures, 7 tables; Accepted by ApJS on 24 May 2021; Contact Authors: I. Mereu, S. Cutini, E. Cavazzuti, G. Tosti
Published: 2021
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22. Fermi LAT Gamma-ray Detection of the Recurrent Nova RS Ophiuchi during its 2021 Outburst

Author: Cheung, C. C., primary, Johnson, T. J., additional, Jean, P., additional, Kerr, M., additional, Page, K. L., additional, Osborne, J. P., additional, Beardmore, A. P., additional, Sokolovsky, K. V., additional, Teyssier, F., additional, Ciprini, S., additional, Martí-Devesa, G., additional, Mereu, I., additional, Razzaque, S., additional, Wood, K. S., additional, Shore, S. N., additional, Korotkiy, S., additional, Levina, A., additional, and Blumenzweig, A., additional
Published: 2022
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23. Search for New Cosmic-Ray Acceleration Sites within the 4FGL Catalog Galactic Plane Sources

Author: Abdollahi, S., primary, Acero, F., additional, Ackermann, M., additional, Baldini, L., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Bellazzini, R., additional, Berenji, B., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bonino, R., additional, Bruel, P., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Castro, D., additional, Chiaro, G., additional, Cibrario, N., additional, Ciprini, S., additional, Coronado-Blázquez, J., additional, Crnogorcevic, M., additional, Cutini, S., additional, D’Ammando, F., additional, De Gaetano, S., additional, Di Lalla, N., additional, Dirirsa, F., additional, Di Venere, L., additional, Domínguez, A., additional, Fegan, S. J., additional, Fiori, A., additional, Fleischhack, H., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Fusco, P., additional, Gammaldi, V., additional, Gargano, F., additional, Gasparrini, D., additional, Giacchino, F., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Glanzman, T., additional, Green, D., additional, Grenier, I. A., additional, Grondin, M.-H., additional, Guiriec, S., additional, Gustafsson, M., additional, Harding, A. K., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Hou, X., additional, Jóhannesson, G., additional, Kayanoki, T., additional, Kerr, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Li, J., additional, Longo, F., additional, Loparco, F., additional, Lubrano, P., additional, Maldera, S., additional, Malyshev, D., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Michelson, P. F., additional, Mirabal, N., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Nuss, E., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Pillera, R., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Reposeur, T., additional, Sánchez-Conde, M., additional, Saz Parkinson, P. M., additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Sueoka, K., additional, Suson, D. J., additional, Tajima, H., additional, Tak, D., additional, Thayer, J. B., additional, Torres, D. F., additional, Troja, E., additional, Valverde, J., additional, Wadiasingh, Z., additional, Wood, K., additional, and Zaharijas, G., additional
Published: 2022
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24. Incremental Fermi Large Area Telescope Fourth Source Catalog

Author: Abdollahi, S., primary, Acero, F., additional, Baldini, L., additional, Ballet, J., additional, Bastieri, D., additional, Bellazzini, R., additional, Berenji, B., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bloom, E., additional, Bonino, R., additional, Brill, A., additional, Britto, R. J., additional, Bruel, P., additional, Burnett, T. H., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Castro, D., additional, Chaty, S., additional, Cheung, C. C., additional, Chiaro, G., additional, Cibrario, N., additional, Ciprini, S., additional, Coronado-Blázquez, J., additional, Crnogorcevic, M., additional, Cutini, S., additional, D’Ammando, F., additional, De Gaetano, S., additional, Digel, S. W., additional, Di Lalla, N., additional, Dirirsa, F., additional, Di Venere, L., additional, Domínguez, A., additional, Fallah Ramazani, V., additional, Fegan, S. J., additional, Ferrara, E. C., additional, Fiori, A., additional, Fleischhack, H., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Galanti, G., additional, Gammaldi, V., additional, Gargano, F., additional, Garrappa, S., additional, Gasparrini, D., additional, Giacchino, F., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Glanzman, T., additional, Green, D., additional, Grenier, I. A., additional, Grondin, M.-H., additional, Guillemot, L., additional, Guiriec, S., additional, Gustafsson, M., additional, Harding, A. K., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Hou, X., additional, Jóhannesson, G., additional, Karwin, C., additional, Kayanoki, T., additional, Kerr, M., additional, Kuss, M., additional, Landriu, D., additional, Larsson, S., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lott, B., additional, Lubrano, P., additional, Maldera, S., additional, Malyshev, D., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Mirabal, N., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Moiseev, A. A., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Paneque, D., additional, Pei, Z., additional, Perkins, J. S., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Pillera, R., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Reposeur, T., additional, Sánchez-Conde, M., additional, Saz Parkinson, P. M., additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Smith, D. A., additional, Spandre, G., additional, Spinelli, P., additional, Sueoka, K., additional, Suson, D. J., additional, Tajima, H., additional, Tak, D., additional, Thayer, J. B., additional, Thompson, D. J., additional, Torres, D. F., additional, Troja, E., additional, Valverde, J., additional, Wood, K., additional, and Zaharijas, G., additional
Published: 2022
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25. The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3

Author: Ajello, M., Baldini, L., Ballet, J., Bastieri, D., Becerra Gonzalez, J., Bellazzini, R., Berretta, A., Bissaldi, E., Bonino, R., Brill, A., Bruel, P., Buson, S., Caputo, R., Caraveo, P. A., Cheung, C. C., Chiaro, G., Cibrario, N., Ciprini, S., Crnogorcevic, M., Cutini, S., D'Ammando, F., De Gaetano, S., Di Lalla, N., Di Venere, L., Domínguez, A., Fallah Ramazani, V., Ferrara, E. C., Fiori, A., Fukazawa, Y., Funk, S., Fusco, P., Gammaldi, V., Gargano, F., Garrappa, Simone, Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Horan, D., Hou, X., Kayanoki, T., Kuss, M., Larsson, S., Latronico, L., Lewis, T., Li, J., Liodakis, I., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Maldera, S., Manfreda, A., Martí-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Ojha, R., Orienti, M., Orlando, E., Ormes, J. F., Pei, Z., Pena-Herazo, H., Persic, M., Pesce-Rollins, M., Petrosian, V., Pillera, R., Poon, H., Porter, T. A., Principe, G., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Scotton, L., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Torres, D. F., Valverde, J., Yassin, H., and Zaharijas, G.
Abstract: An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 yr of E > 50 MeV gamma-ray data, where the spectral parameters, spectral energy distributions (SEDs), yearly light curves, and associations have been updated for all sources. The new reported AGNs include 587 blazar candidates and four radio galaxies. We describe the properties of the new sample and outline changes affecting the previously published one. We also introduce two new parameters in this release, namely the peak energy of the SED high-energy component and the corresponding flux. These parameters allow an assessment of the Compton dominance, the ratio of the inverse-Compton to the synchrotron-peak luminosities, without relying on X-ray data.
Published: 2022
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26. Gamma Rays from Fast Black-hole Winds

Author: Ajello, M., primary, Baldini, L., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bloom, E. D., additional, Bonino, R., additional, Bruel, P., additional, Buson, S., additional, Cameron, R. A., additional, Caprioli, D., additional, Caputo, R., additional, Cavazzuti, E., additional, Chartas, G., additional, Chen, S., additional, Cheung, C. C., additional, Chiaro, G., additional, Costantin, D., additional, Cutini, S., additional, D’Ammando, F., additional, de la Torre Luque, P., additional, de Palma, F., additional, Desai, A., additional, Diesing, R., additional, Di Lalla, N., additional, Dirirsa, F., additional, Di Venere, L., additional, Domínguez, A., additional, Fegan, S. J., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Guiriec, S., additional, Hartmann, D., additional, Horan, D., additional, Jóhannesson, G., additional, Karwin, C., additional, Kerr, M., additional, Kovačević, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Marchesi, S., additional, Marcotulli, L., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Michelson, P. F., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Paliya, V., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Reimer, A., additional, Reimer, O., additional, Saz Parkinson, P. M., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tak, D., additional, Torres, D. F., additional, Troja, E., additional, Wood, K., additional, Zaharijas, G., additional, and Zrake, J., additional
Published: 2021
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27. Fermi Large Area Telescope Performance after 10 Years of Operation

Author: Ajello, M., primary, Atwood, W. B., additional, Axelsson, M., additional, Bagagli, R., additional, Bagni, M., additional, Baldini, L., additional, Bastieri, D., additional, Bellardi, F., additional, Bellazzini, R., additional, Bissaldi, E., additional, Bloom, E. D., additional, Bonino, R., additional, Bregeon, J., additional, Brez, A., additional, Bruel, P., additional, Buehler, R., additional, Buson, S., additional, Cameron, R. A., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Ceccanti, M., additional, Chen, S., additional, Cheung, C. C., additional, Ciprini, S., additional, Cognard, I., additional, Cohen-Tanugi, J., additional, Cutini, S., additional, D’Ammando, F., additional, de la Torre Luque, P., additional, de Palma, F., additional, Digel, S. W., additional, Dirirsa, F., additional, Di Lalla, N., additional, Di Venere, L., additional, Domínguez, A., additional, Fabiani, D., additional, Ferrara, E. C., additional, Fiori, A., additional, Foglia, G., additional, Fukazawa, Y., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giroletti, M., additional, Glanzman, T., additional, Green, D., additional, Griffin, S., additional, Grondin, M.-H., additional, Grove, J. E., additional, Guillemot, L., additional, Guiriec, S., additional, Gustafsson, M., additional, Hays, E., additional, Horan, D., additional, Jóhannesson, G., additional, Johnson, T. J., additional, Kamae, T., additional, Kerr, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Menon, N., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Minuti, M., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Mongelli, M., additional, Monzani, M. E., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Ojha, R., additional, Orienti, M., additional, Orlando, E., additional, Paccagnella, A., additional, Paliya, V. S., additional, Paneque, D., additional, Pei, Z., additional, Perkins, J. S., additional, Pesce-Rollins, M., additional, Pinchera, M., additional, Piron, F., additional, Poon, H., additional, Porter, T. A., additional, Primavera, R., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Rapposelli, E., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Russell, J. J., additional, Saggini, N., additional, Saz Parkinson, P. M., additional, Scolieri, N., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Smith, D. A., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tajima, H., additional, Thayer, J. G., additional, Thompson, D. J., additional, Tibaldo, L., additional, Torres, D. F., additional, Tosti, G., additional, Valverde, J., additional, Vigiani, L., additional, and Zaharijas, G., additional
Published: 2021
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28. Erratum: First Fermi-LAT Solar Flare Catalog (2021, ApJS, 252, 13)

Author: Ajello, M., primary, Baldini, L., additional, Bastieri, D., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bonino, R., additional, Bruel, P., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Cavazzuti, E., additional, Cheung, C. C., additional, Chiaro, G., additional, Costantin, D., additional, Cutini, S., additional, D’Ammando, F., additional, de Palma, F., additional, Desiante, R., additional, Di Lalla, N., additional, Di Venere, L., additional, Fana Dirirsa, F., additional, Fegan, S. J., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Guiriec, S., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Jóhannesson, G., additional, Kovac’evic’, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Li, J., additional, Longo, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Michelson, P. F., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Piron, F., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Tak, D., additional, Troja, E., additional, Valverde, J., additional, Wood, K., additional, and Zaharijas, G., additional
Published: 2021
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29. Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data

Author: Baldini, L., primary, Ballet, J., additional, Bastieri, D., additional, Becerra Gonzalez, J., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bloom, E. D., additional, Bonino, R., additional, Bottacini, E., additional, Bruel, P., additional, Buson, S., additional, Cameron, R. A., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Chen, S., additional, Chiaro, G., additional, Ciangottini, D., additional, Cibario, N., additional, Ciprini, S., additional, Cristarella Orestano, P., additional, Crnogorcevic, M., additional, Cutini, S., additional, D’Ammando, F., additional, de la Torre Luque, P., additional, de Palma, F., additional, Digel, S. W., additional, Di Lalla, N., additional, Dirirsa, F., additional, Di Venere, L., additional, Domínguez, A., additional, Fiori, A., additional, Fleischhack, H., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Germani, S., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Griffin, S., additional, Guiriec, S., additional, Gustafsson, M., additional, Hewitt, J. W., additional, Horan, D., additional, Imazawa, R., additional, Jóhannesson, G., additional, Kerr, M., additional, Kocevski, D., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Matake, H., additional, Mazziotta, M. N., additional, Mereu, I., additional, Meyer, M., additional, Mirabal, N., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Nagasawa, S., additional, Negro, M., additional, Ojha, R., additional, Orienti, M., additional, Orlando, E., additional, Palatiello, M., additional, Paliya, V., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Saz Parkinson, P. M., additional, Scotton, L., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tajima, H., additional, Tak, D., additional, Torres, D. F., additional, Tosti, G., additional, Troja, E., additional, Wood, K., additional, Yassine, M., additional, and Zaharijas, G., additional
Published: 2021
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30. Erratum: First fermi-LAT solar flare catalog (Astrophysical Journal, Supplement Series (2021) 252 (13) DOI: 10.3847/1538-4365/abd32e)

Author: Ajello, M., Baldini, L., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Cavazzuti, E., Cheung, C. C., Chiaro, G., Costantin, D., Cutini, S., D'Ammando, F., de Palma, F., Desiante, R., Di Lalla, N., Di Venere, L., Fana Dirirsa, F., Fegan, S. J., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giordano, F., Giroletti, M., Green, D., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Johannesson, G., Kovacevic, M., Kuss, M., Larsson, S., Latronico, L., Li, J., Longo, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Racusin, J. L., Rainò, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Tak, D., Troja, E., Valverde, J., Wood, K., and Zaharijas, G.
Published: 2021

31. Artificial Neural Network classification of 4FGL sources

Author: Germani, S, primary, Tosti, G, additional, Lubrano, P, additional, Cutini, S, additional, Mereu, I, additional, and Berretta, A, additional
Published: 2021
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32. The First Fermi-LAT Solar Flare Catalog Appendix

Author: Ajello, M, Baldini, L, Bastieri, D, Bellazzini, R, Berretta, A, Bissaldi, E, Blandford, R.D, Bonino, R, Bruel, P, Cameron, R, Caputo, R, Cavazzuti, E, Cheung, C.C, Chiaro, G, Costantin, D, Cutini, S, D'Ammando, F, De Palma, F, Di Lalla, N, Dirirsa, F, Di Venere, L, Fegan, S.J, Fukazawa, Y, Funk, S, Fusco, P, Gargano, F, Gasparrini, D, Giordano, F, Giroletti, M, Green, D, Guirec, S, Hayes, E, Hewitt, J.W, Horan, D, Johannesson, G, Kovac'evic, M, Kuss, M, Larsson, S, Latronico, L, Li, J, Longo, F, Lovellette, M.N, Lubrano, P, Maldera, S, Manfreda, A, Marti-Devesa, G, Mazziotta, M.N, Mereu, I, Michelson, P.F, Mizuno, T, Monzani, M.E, Morselli, A, Moskalenko, I, Negro, M, Omodei, N, Orienti, M, Orlando, E, Paneque, D, Pei, Z, Persic, M, Pesce-Rollins, M, Petrosian, V, Piron, F, Porter, T.A, Principe, G, Racusin, J.L, Raino', S, Rando, R, Rani, B, Razzano, M, Razzaque, S, Reimer, A, Reimer, O, Serini, D, Sgro', C, Siskind, E.J, Spandre, G, Spinelli, P, Tak, D, Troja, E, Valverde, J, Wood, K, and Zaharijas, G
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics
Abstract: We present the appendix of the First Fermi-Large Area Telescope (LAT) Solar flare catalog covering the 24thSolar cycle. The catalog (published in ApJS) contains 45 Fermi-LAT Solar flares (FLSFs) with emission in theγ-ray energy band (30 MeV -10 GeV) detected with a significance ≥5σ over the years 2010-2018. A subsample containing 37 of these flares exhibit delayed emission beyond the prompt-impulsive hard X-ray phase with 21 flares showing delayed emission lasting more than two hours. No prompt-impulsive emission is detected in four of these flares. We also report the first time observations of GeV emission from 3 flares originating from Active Regions located behind the limb (BTL) of the visible Solar disk. We report the light curves, spectra, best proton index and localization (when possible) for all the FLSFs and correlations with Solar multi-wavelength phenomena. The gamma-ray spectra is consistent with the decay of pions produced by >300 MeV protons. The work presented in the First Fermi Solar Flare Catalog contains the largest sample of high-energy gamma-ray flares ever reported and provides the unique opportunity to perform population/correlation studies on the different phases of the flare and thus allowing to open a new window in solar physics. This work is on behalf of the Fermi Large Area Telescope Collaboration. The First Fermi LAT Solar Flare Catalog has been accepted for publication on ApJS.
Published: 2020
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33. Gamma Rays from Fast Black-hole Winds

Author: Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caprioli, D., Caputo, R., Cavazzuti, E., Chartas, G., Chen, S., Cheung, C. C., Chiaro, G., Costantin, D., Cutini, S., D'Ammando, F., de la Torre Luque, P., de Palma, F., Desai, A., Diesing, R., Di Lalla, N., Dirirsa, F., Di Venere, L., Dominguez, A., Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Hartmann, D., Horan, D., Jóhannesson, Guðlaugur, Karwin, C., Kerr, M., Kovacevic, M., Kuss, M., Larsson, Stefan, Latronico, L., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marchesi, S., Marcotulli, L., Marti-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paliya, V., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Reimer, A., Reimer, O., Saz Parkinson, P. M., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tak, D., Torres, D. F., Troja, E., Wood, K., Zaharijas, G., Zrake, J., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caprioli, D., Caputo, R., Cavazzuti, E., Chartas, G., Chen, S., Cheung, C. C., Chiaro, G., Costantin, D., Cutini, S., D'Ammando, F., de la Torre Luque, P., de Palma, F., Desai, A., Diesing, R., Di Lalla, N., Dirirsa, F., Di Venere, L., Dominguez, A., Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Hartmann, D., Horan, D., Jóhannesson, Guðlaugur, Karwin, C., Kerr, M., Kovacevic, M., Kuss, M., Larsson, Stefan, Latronico, L., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marchesi, S., Marcotulli, L., Marti-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paliya, V., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Reimer, A., Reimer, O., Saz Parkinson, P. M., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tak, D., Torres, D. F., Troja, E., Wood, K., Zaharijas, G., and Zrake, J.
Abstract: Massive black holes at the centers of galaxies can launch powerful wide-angle winds that, if sustained over time, can unbind the gas from the stellar bulges of galaxies. These winds may be responsible for the observed scaling relation between the masses of the central black holes and the velocity dispersion of stars in galactic bulges. Propagating through the galaxy, the wind should interact with the interstellar medium creating a strong shock, similar to those observed in supernovae explosions, which is able to accelerate charged particles to high energies. In this work we use data from the Fermi Large Area Telescope to search for the gamma-ray emission from galaxies with an ultrafast outflow (UFO): a fast (v similar to 0.1 c), highly ionized outflow, detected in absorption at hard X-rays in several nearby active galactic nuclei (AGN). Adopting a sensitive stacking analysis we are able to detect the average gamma-ray emission from these galaxies and exclude that it is due to processes other than UFOs. Moreover, our analysis shows that the gamma-ray luminosity scales with the AGN bolometric luminosity and that these outflows transfer similar to 0.04% of their mechanical power to gamma-rays. Interpreting the observed gamma-ray emission as produced by cosmic rays (CRs) accelerated at the shock front, we find that the gamma-ray emission may attest to the onset of the wind-host interaction and that these outflows can energize charged particles up to the transition region between galactic and extragalactic CRs.
Published: 2021
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34. First Fermi-LAT Solar Flare Catalog

Author: Ajello, M., Baldini, L., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Cavazzuti, E., Cheung, C. C., Chiaro, G., Costantin, D., Cutini, S., D'Ammando, F., de Palma, F., Desiante, R., Di Lalla, N., Di Venere, L., Fana Dirirsa, F., Fegan, S. J., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giordano, F., Giroletti, M., Green, D., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, Guðlaugur, Kovac'evic', M., Kuss, M., Larsson, S., Latronico, L., Li, J., Longo, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tak, D., Troja, E., Valverde, J., Wood, K., Zaharijas, G., Ajello, M., Baldini, L., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Cavazzuti, E., Cheung, C. C., Chiaro, G., Costantin, D., Cutini, S., D'Ammando, F., de Palma, F., Desiante, R., Di Lalla, N., Di Venere, L., Fana Dirirsa, F., Fegan, S. J., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giordano, F., Giroletti, M., Green, D., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, Guðlaugur, Kovac'evic', M., Kuss, M., Larsson, S., Latronico, L., Li, J., Longo, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Omodei, N., Orienti, M., Orlando, E., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tak, D., Troja, E., Valverde, J., Wood, K., and Zaharijas, G.
Abstract: We present the first Fermi-Large Area Telescope (LAT) solar flare catalog covering the 24th solar cycle. This catalog contains 45 Fermi-LAT solar flares (FLSFs) with emission in the gamma-ray energy band (30 MeV-10 GeV) detected with a significance of >= 5 sigma over the years 2010-2018. A subsample containing 37 of these flares exhibits delayed emission beyond the prompt-impulsive hard X-ray phase, with 21 flares showing delayed emission lasting more than two hours. No prompt-impulsive emission is detected in four of these flares. We also present in this catalog observations of GeV emission from three flares originating from active regions located behind the limb of the visible solar disk. We report the lightcurves, spectra, best proton index, and localization (when possible) for all FLSFs. The gamma-ray spectra are consistent with the decay of pions produced by >300 MeV protons. This work contains the largest sample of high-energy gamma-ray flares ever reported and provides a unique opportunity to perform population studies on the different phases of the flare and thus allowing a new window in solar physics to be opened.
Published: 2021
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35. First Fermi-LAT Solar Flare Catalog

Author: Ajello, M., primary, Baldini, L., additional, Bastieri, D., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bonino, R., additional, Bruel, P., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Cavazzuti, E., additional, Cheung, C. C., additional, Chiaro, G., additional, Costantin, D., additional, Cutini, S., additional, D’Ammando, F., additional, de Palma, F., additional, Desiante, R., additional, Di Lalla, N., additional, Di Venere, L., additional, Dirirsa, F. Fana, additional, Fegan, S. J., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Guiriec, S., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Jóhannesson, G., additional, Kovac’evic’, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Li, J., additional, Longo, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Michelson, P. F., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Piron, F., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Tak, D., additional, Troja, E., additional, Valverde, J., additional, Wood, K., additional, and Zaharijas, G., additional
Published: 2021
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36. MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources

Author: Ahnen, M L, Ansoldi, S, Antonelli, L A, Arcaro, C, Baack, D, Babić, A, Banerjee, B, Bangale, P, Barres&nbsp, de&nbsp, Almeida, U, Barrio, J A, Becerra&nbsp, González, J, Bednarek, W, Bernardini, E, Berse, R Ch, Berti, A, Bhattacharyya, W, Biland, A, Blanch, O, Bonnoli, G, Carosi, R, Carosi, A, Ceribella, G, Chatterjee, A, Colak, S M, Colin, P, Colombo, E, Contreras, J L, Cortina, J, Covino, S, Cumani, P, Da&nbsp, Vela, P, Dazzi, F, De&nbsp, Angelis, A, Lotto, B, Delfino, M, Delgado, J, Di&nbsp, Pierro, F, Domínguez, A, Dominis&nbsp, Prester, D, Dorner, D, Doro, M, Einecke, S, Elsaesser, D, Fallah&nbsp, Ramazani, V, Fernández-Barral, A, Fidalgo, D, Fonseca, M V, Font, L, Fruck, C, Galindo, D, García&nbsp, López, R J, Garczarczyk, M, Gaug, M, Giammaria, P, Godinović, N, Gora, D, Guberman, D, Hadasch, D, Hahn, A, Hassan, T, Hayashida, M, Herrera, J, Hose, J, Hrupec, D, Ishio, K, Konno, Y, Kubo, H, Kushida, J, Kuveždić, D, Lelas, D, Lindfors, E, Lombardi, S, Longo, F, López, M, Maggio, C, Majumdar, P, Makariev, M, Maneva, G, Manganaro, M, Mannheim, K, Maraschi, L, Mariotti, M, Martínez, M, Masuda, S, Mazin, D, Mielke, K, Minev, M, Miranda, J M, Mirzoyan, R, Moralejo, A, Moreno, V, Moretti, E, Nagayoshi, T, Neustroev, V, Niedzwiecki, A, Nievas&nbsp, Rosillo, M, Nigro, C, Nilsson, K, Ninci, D, Nishijima, K, Noda, K, Nogués, L, Paiano, S, Palacio, J, Paneque, D, Paoletti, R, Paredes, J M, Pedaletti, G, Peresano, M, Persic, M, Prada&nbsp, Moroni, P G, Prandini, E, Puljak, I, Garcia, J R, Reichardt, I, Rhode, W, Ribó, M, Rico, J, Righi, C, Rugliancich, A, Saito, T, Satalecka, K, Schweizer, T, Sitarek, J, Šnidarić, I, Sobczynska, D, Stamerra, A, Strzys, M, Surić, T, Takahashi, M, Takalo, L, Tavecchio, F, Temnikov, P, Terzić, T, Teshima, M, Torres-Albà, N, Treves, A, Tsujimoto, S, Vanzo, G, Vazquez&nbsp, Acosta, M, Vovk, I, Ward, J E, Will, M, Zarić, D, Albert, A, Alfaro, R, Alvarez, C, Arceo, R, Arteaga-Velázquez, J C, Avila&nbsp, Rojas, D, Ayala&nbsp, Solares, H A, Becerril, A, Belmont-Moreno, E, Benzvi, S Y, Bernal, A, Braun, J, Caballero-Mora, K S, Capistrán, T, Carramiñana, A, Casanova, S, Castillo, M, Cotti, U, Cotzomi, J, Coutiño&nbsp, León, S, León, C, la&nbsp, Fuente, E, Diaz&nbsp, Hernandez, R, Dichiara, S, Dingus, B L, Duvernois, M A, Díaz-Vélez, J C, Ellsworth, R W, Engel, K, Enriquez-Rivera, O, Fiorino, D W, Fleischhack, H, Fraija, N, García-González, J A, Garfias, F, González-Muñoz, A, González, M M, Goodman, J A, Hampel-Arias, Z, Harding, J P, Hernandez, S, Hueyotl-Zahuantitla, F, Hui, C M, Hüntemeyer, P, Iriarte, A, Jardin-Blicq, A, Joshi, V, Kaufmann, S, Lara, A, Lauer, R J, Lee, W H, Lennarz, D, León&nbsp, Vargas, H, Linnemann, J T, Longinotti, A L, Luis-Raya, G, Luna-García, R, López-Coto, R, Malone, K, Marinelli, S S, Martinez, O, Martinez-Castellanos, I, Martínez-Castro, J, Martínez-Huerta, H, Matthews, J A, Miranda-Romagnoli, P, Moreno, E, Mostafá, M, Nayerhoda, A, Nellen, L, Newbold, M, Nisa, M U, Noriega-Papaqui, R, Pelayo, R, Pretz, J, Pérez-Pérez, E G, Ren, Z, Rho, C D, Rivière, C, Rosa-González, D, Rosenberg, M, Ruiz-Velasco, E, Salesa&nbsp, Greus, F, Sandoval, A, Schneider, M, Seglar&nbsp, Arroyo, M, Sinnis, G, Smith, A J, Springer, R W, Surajbali, P, Taboada, I, Tibolla, O, Tollefson, K, Torres, I, Ukwatta, T N, Vianello, G, Villaseñor, L, Werner, F, Westerhoff, S, Wood, J, Yapici, T, Yodh, G, Zepeda, A, Zhou, H, Álvarez, J D, Ajello, M, Baldini, L, Barbiellini, G, Berenji, B, Bissaldi, E, Blandford, R D, Bonino, R, Bottacini, E, Brandt, T J, Bregeon, J, Bruel, P, Cameron, R A, Caputo, R, Caraveo, P A, Castro, D, Cavazzuti, E, Chiaro, G, Ciprini, S, Costantin, D, D’Ammando, F, Palma, F, Desai, A, Lalla, N, Mauro, M, Venere, L, Favuzzi, C, Fukazawa, Y, Funk, S, Fusco, P, Gargano, F, Gasparrini, D, Giglietto, N, Giordano, F, Giroletti, M, Glanzman, T, Green, D, Grenier, I A, Guiriec, S, Harding, A K, Hays, E, Hewitt, J W, Horan, D, Jóhannesson, G, Kuss, M, Larsson, S, Liodakis, I, Loparco, F, Lubrano, P, Magill, J D, Maldera, S, Manfreda, A, Mazziotta, M N, Mereu, I, Michelson, P F, Mizuno, T, Monzani, M E, Morselli, A, Moskalenko, I V, Negro, M, Nuss, E, Omodei, N, Orienti, M, Orlando, E, Ormes, J F, Palatiello, M, Paliya, V S, Pesce-Rollins, M, Petrosian, V, Piron, F, Porter, T A, Principe, G, Rainò, S, Rani, B, Razzano, M, Razzaque, S, Reimer, A, Reimer, O, Sgrò, C, Siskind, E J, Spandre, G, Spinelli, P, Tajima, H, Thayer, J B, Thompson, D J, Torres, D F, Torresi, E, Troja, E, Valverde, J, Wood, K, Yassine, M, Fermi-LAT&nbsp, Collaboration, Null, Laboratoire Univers et Particules de Montpellier (LUPM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), MAGIC, HAWC, Fermi-LAT, ITA, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babic, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bernardini, E., Berse, R. C., Berti, A., Bhattacharyya, W., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, Delgado, J., Di Pierro, F., Dominguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fernandez-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Garcia Lopez, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinovic, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuvedic, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, Lopez, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Masuda, S., Mazin, Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Strzys, M., Suric, T., Takahashi, M., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, Torres-Alba, N., Treves, A., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zaric, D., Albert, A., Alfaro, R., Alvarez, C., Arceo, R., Arteaga-Velazquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Becerril, A., Belmont-Moreno, E., Benzvi, S. Y., Bernal, A., Braun, J., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Castillo, M., Cotti, U., Cotzomi, J., Coutino De Leon, S., De Leon, C., De La Fuente, E., Diaz Hernandez, R., Dichiara, S., Dingus, B. L., Duvernois, M. A., Diaz-Velez, J. C., Ellsworth, R. W., Engel, K., Enriquez-Rivera, O., Fiorino, D., Fleischhack, H., Fraija, N., Garcia-Gonzalez, J. A., Garfias, F., Gonzalez-Munoz, A., Gonzalez, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hueyotl-Zahuantitla, F., Hui, C. M., Huntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Lara, A., Lauer, R. J., Lee, W. H., Lennarz, D., Leon Vargas, H., Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Luna-Garcia, R., Lopez-Coto, Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martinez-Castro, J., Martinez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pelayo, R., Pretz, J., Perez-Perez, E. G., Ren, Z., Rho, C. D., Riviere, C., Rosa-Gonzalez, D., Rosenberg, M., Ruiz-Velasco, E., Salesa Greus, F., Sandoval, A., Schneider, M., Seglar Arroyo, M., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, I., Tibolla, O., Tollefson, K., Torres, I., Ukwatta, T. N., Vianello, G., Villasenor, L., Werner, F., Westerhoff, S., Wood, J., Yapici, T., Yodh, G., Zepeda, A., Zhou, H., Alvarez, J. D., Ajello, M., Baldini, L., Barbiellini, G., Berenji, B., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, Brandt, T. J., Bregeon, J., Bruel, P., Cameron, R. A., Caputo, R., Caraveo, P. A., Castro, D., Cavazzuti, E., Chiaro, G., Ciprini, Costantin, D., D'Ammando, De Palma, F., Desai, A., Di Lalla, N., Di Mauro, M., Di Venere, L., Favuzzi, C., Fukazawa, Y., Funk, S., Fusco, Gargano, F., Gasparrini, Giglietto, N., Giordano, Giroletti, M., Glanzman, T., Green, D., Grenier, I. A., Guiriec, S., Harding, A. K., Hays, E., Hewitt, J. W., Horan, D., Johannesson, Kuss, M., Larsson, Liodakis, I., Loparco, F., Lubrano, P., Magill, J. D., Maldera, S., Manfreda, A., Mazziotta, M. N., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Palatiello, M., Paliya, V. S., Pesce-Rollins, M., Petrosian, V., Piron, F., Porter, T. A., Principe, G., Raino, S., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, Sgro, C., Siskind, E. J., Spandre, G., Spinelli, Tajima, H., Thayer, J. B., Thompson, D. J., Torres, D. F., Torresi, E., Troja, E., Valverde, J., Wood, K., Yassine, Manal, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Longo, Yassine, Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Astrophysics::High Energy Astrophysical Phenomena, pulsars: general – gamma rays: general – astroparticle physics, FOS: Physical sciences, Astrophysics, general [pulsars], 01 natural sciences, VHE, GLAST, Pulsar, Observatory, pulsars: general, 0103 physical sciences, MAGIC (telescope), 010303 astronomy & astrophysics, pulsar, Astroparticle physics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), gamma rays: general, astroparticle physics, 010308 nuclear & particles physics, Gamma ray, astroparticle physic, Astronomy and Astrophysics, MAGIC, observatory, gamma ray: emission, Space and Planetary Science, Pulsars: general, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], general [gamma rays], HAWC, Fermi Gamma-ray Space Telescope
Abstract: The HAWC Collaboration released the 2HWC catalog of TeV sources, in which 19 show no association with any known high-energy (HE; E > 10 GeV) or very-high-energy (VHE; E > 300 GeV) sources. This catalog motivated follow-up studies by both the MAGIC and Fermi-LAT observatories with the aim of investigating gamma-ray emission over a broad energy band. In this paper, we report the results from the first joint work between HAWC, MAGIC and Fermi-LAT on three unassociated HAWC sources: 2HWC J2006+341, 2HWC J1907+084* and 2HWC J1852+013*. Although no significant detection was found in the HE and VHE regimes, this investigation shows that a minimum 1 degree extension (at 95% confidence level) and harder spectrum in the GeV than the one extrapolated from HAWC results are required in the case of 2HWC J1852+013*, while a simply minimum extension of 0.16 degrees (at 95% confidence level) can already explain the scenario proposed by HAWC for the remaining sources. Moreover, the hypothesis that these sources are pulsar wind nebulae is also investigated in detail., 12 pages, 3 figures. Accepted for publication in MNRAS
Published: 2019
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37. The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

Author: Ajello, M., primary, Angioni, R., additional, Axelsson, M., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Becerra Gonzalez, J., additional, Bellazzini, R., additional, Bissaldi, E., additional, Bloom, E. D., additional, Bonino, R., additional, Bottacini, E., additional, Bruel, P., additional, Buson, S., additional, Cafardo, F., additional, Cameron, R. A., additional, Cavazzuti, E., additional, Chen, S., additional, Cheung, C. C., additional, Ciprini, S., additional, Costantin, D., additional, Cutini, S., additional, D’Ammando, F., additional, de la Torre Luque, P., additional, de Menezes, R., additional, de Palma, F., additional, Desai, A., additional, Di Lalla, N., additional, Di Venere, L., additional, Domínguez, A., additional, Dirirsa, F. Fana, additional, Ferrara, E. C., additional, Finke, J., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Garrappa, S., additional, Gasparrini, D., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Guiriec, S., additional, Harita, S., additional, Hays, E., additional, Horan, D., additional, Itoh, R., additional, Jóhannesson, G., additional, Kovac’evic’, M., additional, Krauss, F., additional, Kreter, M., additional, Kuss, M., additional, Larsson, S., additional, Leto, C., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lott, B., additional, Lovellette, M. N., additional, Lubrano, P., additional, Madejski, G. M., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Massaro, F., additional, Mazziotta, M. N., additional, Mereu, I., additional, Meyer, M., additional, Migliori, G., additional, Mirabal, N., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nemmen, R., additional, Nuss, E., additional, Ojha, L. S., additional, Ojha, R., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Paliya, V. S., additional, Pei, Z., additional, Peña-Herazo, H., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrov, L., additional, Piron, F., additional, Poon, H., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Schinzel, F. K., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tachibana, Y., additional, Thompson, D. J., additional, Torres, D. F., additional, Torresi, E., additional, Troja, E., additional, Valverde, J., additional, van Zyl, P., additional, and Yassine, M., additional
Published: 2020
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38. Fermi Large Area Telescope Fourth Source Catalog

Author: Abdollahi, S., primary, Acero, F., additional, Ackermann, M., additional, Ajello, M., additional, Atwood, W. B., additional, Axelsson, M., additional, Baldini, L., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Becerra Gonzalez, J., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bloom, E. D., additional, Bonino, R., additional, Bottacini, E., additional, Brandt, T. J., additional, Bregeon, J., additional, Bruel, P., additional, Buehler, R., additional, Burnett, T. H., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Casandjian, J. M., additional, Castro, D., additional, Cavazzuti, E., additional, Charles, E., additional, Chaty, S., additional, Chen, S., additional, Cheung, C. C., additional, Chiaro, G., additional, Ciprini, S., additional, Cohen-Tanugi, J., additional, Cominsky, L. R., additional, Coronado-Blázquez, J., additional, Costantin, D., additional, Cuoco, A., additional, Cutini, S., additional, D’Ammando, F., additional, DeKlotz, M., additional, Torre Luque, P. de la, additional, de Palma, F., additional, Desai, A., additional, Digel, S. W., additional, Lalla, N. Di, additional, Mauro, M. Di, additional, Venere, L. Di, additional, Domínguez, A., additional, Dumora, D., additional, Dirirsa, F. Fana, additional, Fegan, S. J., additional, Ferrara, E. C., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giglietto, N., additional, Giommi, P., additional, Giordano, F., additional, Giroletti, M., additional, Glanzman, T., additional, Green, D., additional, Grenier, I. A., additional, Griffin, S., additional, Grondin, M.-H., additional, Grove, J. E., additional, Guiriec, S., additional, Harding, A. K., additional, Hayashi, K., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Jóhannesson, G., additional, Johnson, T. J., additional, Kamae, T., additional, Kerr, M., additional, Kocevski, D., additional, Kovac’evic’, M., additional, Kuss, M., additional, Landriu, D., additional, Larsson, S., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lott, B., additional, Lovellette, M. N., additional, Lubrano, P., additional, Madejski, G. M., additional, Maldera, S., additional, Malyshev, D., additional, Manfreda, A., additional, Marchesini, E. J., additional, Marcotulli, L., additional, Martí-Devesa, G., additional, Martin, P., additional, Massaro, F., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Mirabal, N., additional, Mizuno, T., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Ojha, R., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Palatiello, M., additional, Paliya, V. S., additional, Paneque, D., additional, Pei, Z., additional, Peña-Herazo, H., additional, Perkins, J. S., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Petrov, L., additional, Piron, F., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Rainò, S., additional, Rando, R., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Remy, Q., additional, Reposeur, T., additional, Romani, R. W., additional, Parkinson, P. M. Saz, additional, Schinzel, F. K., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Smith, D. A., additional, Spandre, G., additional, Spinelli, P., additional, Strong, A. W., additional, Suson, D. J., additional, Tajima, H., additional, Takahashi, M. N., additional, Tak, D., additional, Thayer, J. B., additional, Thompson, D. J., additional, Tibaldo, L., additional, Torres, D. F., additional, Torresi, E., additional, Valverde, J., additional, Klaveren, B. Van, additional, Zyl, P. van, additional, Wood, K., additional, Yassine, M., additional, and Zaharijas, G., additional
Published: 2020
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39. Fermi Large Area Telescope Fourth Source Catalog

Author: Abdollahi, S., Acero, F., Ackermann, Markus, Ajello, M., Atwood, W. B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Becerra Gonzalez, J., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Brandt, T. J., Bregeon, J., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Casandjian, J. M., Castro, D., Cavazzuti, E., Charles, E., Chaty, S., Chen, S., Cheung, C. C., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Cominsky, L. R., Coronado-Blázquez, J., Costantin, D., Cuoco, A., Cutini, S., D’Ammando, F., DeKlotz, M., Torre Luque, P. De La, De Palma, F., Desai, A., Digel, S. W., Lalla, N. Di, Mauro, M. Di, Venere, L. Di, Domínguez, A., Dumora, D., Dirirsa, F. Fana, Fegan, S. J., Ferrara, E. C., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Glanzman, T., Green, D., Grenier, I. A., Griffin, S., Grondin, M.-H., Grove, J. E., Guiriec, S., Harding, A. K., Hayashi, K., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, G., Johnson, T. J., Kamae, T., Kerr, M., Kocevski, D., Kovac’evic’, M., Kuss, M., Landriu, D., Larsson, S., Latronico, L., Lemoine-Goumard, M., Li, Jian, Liodakis, I., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Maldera, S., Malyshev, D., Manfreda, A., Marchesini, E. J., Marcotulli, L., Martí-Devesa, G., Martin, P., Massaro, F., Mazziotta, M. N., McEnery, J. E., Mereu, I., Meyer, M., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Ojha, R., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Palatiello, M., Paliya, Vaidehi Sharan, Paneque, D., Pei, Z., Peña-Herazo, H., Perkins, J. S., Persic, M., Pesce-Rollins, M., Petrosian, V., Petrov, L., Piron, F., Poon, H., Porter, T. A., Principe, G., Rainò, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Remy, Q., Reposeur, T., Romani, R. W., Parkinson, P. M. Saz, Schinzel, F. K., Serini, D., Sgrò, C., Siskind, E. J., Smith, D. A., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Tajima, H., Takahashi, M. N., Tak, D., Thayer, J. B., Thompson, D. J., Tibaldo, L., Torres, D. F., Torresi, E., Valverde, J., Klaveren, B. Van, Zyl, P. Van, Wood, K., Yassine, M., and Zaharijas, G.
Abstract: The astrophysical journal / Supplement series Supplement series [...] 247(1), 33 - (2020). doi:10.3847/1538-4365/ab6bcb, We present the fourth Fermi Large Area Telescope catalog (4FGL) of γ-ray sources. Based on the first eight years of science data from the Fermi Gamma-ray Space Telescope mission in the energy range from 50 MeV to 1 TeV, it is the deepest yet in this energy range. Relative to the 3FGL catalog, the 4FGL catalog has twice as much exposure as well as a number of analysis improvements, including an updated model for the Galactic diffuse γ-ray emission, and two sets of light curves (one-year and two-month intervals). The 4FGL catalog includes 5064 sources above 4σ significance, for which we provide localization and spectral properties. Seventy-five sources are modeled explicitly as spatially extended, and overall, 358 sources are considered as identified based on angular extent, periodicity, or correlated variability observed at other wavelengths. For 1336 sources, we have not found plausible counterparts at other wavelengths. More than 3130 of the identified or associated sources are active galaxies of the blazar class, and 239 are pulsars., Published by Univ. of Chicago Press11033, Chicago, Ill. [u.a.]
Published: 2020
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40. The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

Author: Ajello, M., Angioni, R., Axelsson, Magnus, Ballet, J., Barbiellini, G., Bastieri, D., Becerra Gonzalez, J., Bellazzini, R., Bissaldi, E., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buson, S., Cafardo, F., Cameron, R. A., Cavazzuti, E., Chen, S., Cheung, C. C., Ciprini, S., Costantin, D., Cutini, S., D'Ammando, F., de la Torre Luque, P., de Menezes, R., de Palma, F., Desai, A., Di Lalla, N., Di Venere, L., Dominguez, A., Fana Dirirsa, F., Ferrara, E. C., Finke, J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Garrappa, S., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Harita, S., Hays, E., Horan, D., Itoh, R., Jóhannesson, Guðlaugur, Kovac'evic', M., Krauss, F., Kreter, M., Kuss, M., Larsson, S., Leto, C., Li, J., Liodakis, I., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Maldera, S., Manfreda, A., Marti-Devesa, G., Massaro, F., Mazziotta, M. N., Mereu, I., Meyer, M., Migliori, G., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I., Negro, M., Nemmen, R., Nuss, E., Ojha, L. S., Ojha, R., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paliya, V. S., Pei, Z., Pena-Herazo, H., Persic, M., Pesce-Rollins, M., Petrov, L., Piron, F., Poon, H., Principe, G., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Schinzel, F. K., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tachibana, Y., Thompson, D. J., Torres, D. F., Torresi, E., Troja, E., Valverde, J., van Zyl, P., Yassine, M., Ajello, M., Angioni, R., Axelsson, Magnus, Ballet, J., Barbiellini, G., Bastieri, D., Becerra Gonzalez, J., Bellazzini, R., Bissaldi, E., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buson, S., Cafardo, F., Cameron, R. A., Cavazzuti, E., Chen, S., Cheung, C. C., Ciprini, S., Costantin, D., Cutini, S., D'Ammando, F., de la Torre Luque, P., de Menezes, R., de Palma, F., Desai, A., Di Lalla, N., Di Venere, L., Dominguez, A., Fana Dirirsa, F., Ferrara, E. C., Finke, J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Garrappa, S., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Harita, S., Hays, E., Horan, D., Itoh, R., Jóhannesson, Guðlaugur, Kovac'evic', M., Krauss, F., Kreter, M., Kuss, M., Larsson, S., Leto, C., Li, J., Liodakis, I., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Maldera, S., Manfreda, A., Marti-Devesa, G., Massaro, F., Mazziotta, M. N., Mereu, I., Meyer, M., Migliori, G., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I., Negro, M., Nemmen, R., Nuss, E., Ojha, L. S., Ojha, R., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paliya, V. S., Pei, Z., Pena-Herazo, H., Persic, M., Pesce-Rollins, M., Petrov, L., Piron, F., Poon, H., Principe, G., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Schinzel, F. K., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tachibana, Y., Thompson, D. J., Torres, D. F., Torresi, E., Troja, E., Valverde, J., van Zyl, P., and Yassine, M.
Published: 2020
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41. Fermi and Swift Observations of GRB 190114C : Tracing the Evolution of High-energy Emission from Prompt to Afterglow

Author: Ajello, M., Arimoto, M., Axelsson, Magnus, Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Burns, E., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costantin, D., Cutini, S., D'Ammando, F., DeKlotz, M., Luque, P. de la Torre, de Palma, F., Desai, A., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Gill, R., Giordano, F., Giroletti, M., Granot, J., Green, D., Grenier, I. A., Grondin, M. -H., Guiriec, S., Hays, E., Horan, D., Jóhannesson, Guðlaugur, Kocevski, D., Kovac'evic', M., Kuss, M., Larsson, S., Latronico, L., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Malyshev, D., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., McEnery, J. E., Mereu, I., Meyer, M., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Ryde, F., Parkinson, P. M. Saz, Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Takagi, K., Takahashi, M. N., Tak, D., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Valverde, J., Van Klaveren, B., Wood, K., Yassine, M., Zaharijas, G., Mailyan, B., Bhat, P. N., Briggs, M. S., Cleveland, W., Giles, M., Goldstein, A., Hui, M., Malacaria, Christian, Preece, R., Roberts, O. J., Veres, P., Wilson-Hodge, C., von Kienlin, A., Cenko, S. B., O'Brien, P., Beardmore, A. P., Lien, A., Osborne, J. P., Tohuvavohu, A., D'Elia, V., D'Ai, A., Perri, M., Gropp, J., Klingler, N., Capalbi, M., Tagliaferri, G., Stamatikos, M., De Pasquale, M., Ajello, M., Arimoto, M., Axelsson, Magnus, Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Burns, E., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costantin, D., Cutini, S., D'Ammando, F., DeKlotz, M., Luque, P. de la Torre, de Palma, F., Desai, A., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Gill, R., Giordano, F., Giroletti, M., Granot, J., Green, D., Grenier, I. A., Grondin, M. -H., Guiriec, S., Hays, E., Horan, D., Jóhannesson, Guðlaugur, Kocevski, D., Kovac'evic', M., Kuss, M., Larsson, S., Latronico, L., Lemoine-Goumard, M., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Malyshev, D., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., McEnery, J. E., Mereu, I., Meyer, M., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Ryde, F., Parkinson, P. M. Saz, Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Takagi, K., Takahashi, M. N., Tak, D., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Valverde, J., Van Klaveren, B., Wood, K., Yassine, M., Zaharijas, G., Mailyan, B., Bhat, P. N., Briggs, M. S., Cleveland, W., Giles, M., Goldstein, A., Hui, M., Malacaria, Christian, Preece, R., Roberts, O. J., Veres, P., Wilson-Hodge, C., von Kienlin, A., Cenko, S. B., O'Brien, P., Beardmore, A. P., Lien, A., Osborne, J. P., Tohuvavohu, A., D'Elia, V., D'Ai, A., Perri, M., Gropp, J., Klingler, N., Capalbi, M., Tagliaferri, G., Stamatikos, M., and De Pasquale, M.
Abstract: We report on the observations of gamma-ray burst (GRB) 190114C by the Fermi Gamma -ray Space Telescope and the Neil Gehrels Swift Observatory. The prompt gamma-ray emission was detected by the Fermi GRB Monitor (GBM), the Fermi Large Area Telescope (LAT), and the Swift Burst Alert Telescope (BAT) and the long-lived afterglow emission was subsequently observed by the GBM, LAT, Swift X-ray Telescope (XRT), and Swift UV Optical Telescope. The early -time observations reveal multiple emission components that evolve independently, with a delayed power-law component that exhibits significant spectral attenuation above 40 MeV in the first few seconds of the burst. This power-law component transitions to a harder spectrum that is consistent with the afterglow emission observed by the XRT at later times. This afterglow component is clearly identifiable in the GBM and BAT light curves as a slowly fading emission component on which the rest of the prompt emission is superimposed. As a result, we are able to observe the transition from internal-shock- to external-shock-dominated emission. We find that the temporal and spectral evolution of the broadband afterglow emission can be well modeled as synchrotron emission from a forward shock propagating into a wind -like circumstellar environment. We estimate the initial bulk Lorentz factor using the observed high-energy spectral cutoff. Considering the onset of the afterglow component, we constrain the deceleration radius at which this forward shock begins to radiate in order to estimate the maximum synchrotron energy as a function of time. We find that even in the LAT energy range, there exist high-energy photons that are in tension with the theoretical maximum energy that can be achieved through synchrotron emission from a shock. These violations of the maximum synchrotron energy are further compounded by the detection of very high-energy (VHE) emission above 300 GeV by MAGIC concurrent with our observations. We conclude that the
Published: 2020
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42. Fermi and Swift Observations of GRB 190114C: Tracing the Evolution of High-energy Emission from Prompt to Afterglow

Author: Ajello, M., primary, Arimoto, M., additional, Axelsson, M., additional, Baldini, L., additional, Barbiellini, G., additional, Bastieri, D., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bonino, R., additional, Bottacini, E., additional, Bregeon, J., additional, Bruel, P., additional, Buehler, R., additional, Burns, E., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Chen, S., additional, Chiaro, G., additional, Ciprini, S., additional, Cohen-Tanugi, J., additional, Costantin, D., additional, Cutini, S., additional, D’Ammando, F., additional, DeKlotz, M., additional, Torre Luque, P. de la, additional, Palma, F. de, additional, Desai, A., additional, Lalla, N. Di, additional, Venere, L. Di, additional, Fana Dirirsa, F., additional, Fegan, S. J., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giglietto, N., additional, Gill, R., additional, Giordano, F., additional, Giroletti, M., additional, Granot, J., additional, Green, D., additional, Grenier, I. A., additional, Grondin, M.-H., additional, Guiriec, S., additional, Hays, E., additional, Horan, D., additional, Jóhannesson, G., additional, Kocevski, D., additional, Kovac’evic’, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Malyshev, D., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Monzani, M. E., additional, Moretti, E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Palatiello, M., additional, Paliya, V. S., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Piron, F., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Ryde, F., additional, Saz Parkinson, P. M., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Tajima, H., additional, Takagi, K., additional, Takahashi, M. N., additional, Tak, D., additional, Thayer, J. B., additional, Thompson, D. J., additional, Torres, D. F., additional, Troja, E., additional, Valverde, J., additional, Klaveren, B. Van, additional, Wood, K., additional, Yassine, M., additional, Zaharijas, G., additional, Mailyan, B., additional, Bhat, P. N., additional, Briggs, M. S., additional, Cleveland, W., additional, Giles, M., additional, Goldstein, A., additional, Hui, M., additional, Malacaria, Christian, additional, Preece, R., additional, Roberts, O. J., additional, Veres, P., additional, Wilson-Hodge, C., additional, Kienlin, A. von, additional, Cenko, S. B., additional, O’Brien, P., additional, Beardmore, A. P., additional, Lien, A., additional, Osborne, J. P., additional, Tohuvavohu, A., additional, D’Elia, V., additional, D’Aì, A., additional, Perri, M., additional, Gropp, J., additional, Klingler, N., additional, Capalbi, M., additional, Tagliaferri, G., additional, Stamatikos, M., additional, and De Pasquale, M., additional
Published: 2020
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43. Bright Gamma-Ray Flares Observed in GRB 131108A

Author: Ajello, M., primary, Arimoto, M., additional, Asano, K., additional, Axelsson, M., additional, Baldini, L., additional, Barbiellini, G., additional, Bastieri, D., additional, Bellazzini, R., additional, Berretta, A., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bonino, R., additional, Bottacini, E., additional, Bregeon, J., additional, Bruel, P., additional, Buehler, R., additional, Buson, S., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Chen, S., additional, Chiaro, G., additional, Ciprini, S., additional, Costantin, D., additional, Cutini, S., additional, D’Ammando, F., additional, Torre Luque, P. de la, additional, Palma, F. de, additional, Lalla, N. Di, additional, Venere, L. Di, additional, Dirirsa, F. Fana, additional, Fegan, S. J., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Grondin, M.-H., additional, Guiriec, S., additional, Hays, E., additional, Horan, D., additional, Jóhannesson, G., additional, Kocevski, D., additional, Kovac’evic’, M., additional, Kuss, M., additional, Larsson, S., additional, Latronico, L., additional, Li, J., additional, Liodakis, I., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mereu, I., additional, Michelson, P. F., additional, Mizuno, T., additional, Monzani, M. E., additional, Moretti, E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Ohno, M., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Palatiello, M., additional, Paliya, V. S., additional, Paneque, D., additional, Pei, Z., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Piron, F., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Rani, B., additional, Razzano, M., additional, Reimer, A., additional, Reimer, O., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Tajima, H., additional, Takagi, K., additional, Tak, D., additional, Torres, D. F., additional, Valverde, J., additional, Wood, K., additional, Yamazaki, R., additional, Yassine, M., additional, Zhu, S., additional, Uhm, Z. Lucas, additional, and Zhang, Bing, additional
Published: 2019
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44. A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog

Author: Ajello, M., primary, Arimoto, M., additional, Axelsson, M., additional, Baldini, L., additional, Barbiellini, G., additional, Bastieri, D., additional, Bellazzini, R., additional, Bhat, P. N., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bonino, R., additional, Bonnell, J., additional, Bottacini, E., additional, Bregeon, J., additional, Bruel, P., additional, Buehler, R., additional, Cameron, R. A., additional, Caputo, R., additional, Caraveo, P. A., additional, Cavazzuti, E., additional, Chen, S., additional, Cheung, C. C., additional, Chiaro, G., additional, Ciprini, S., additional, Costantin, D., additional, Crnogorcevic, M., additional, Cutini, S., additional, Dainotti, M., additional, D’Ammando, F., additional, Torre Luque, P. de la, additional, Palma, F. de, additional, Desai, A., additional, Desiante, R., additional, Lalla, N. Di, additional, Venere, L. Di, additional, Dirirsa, F. Fana, additional, Fegan, S. J., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Green, D., additional, Grenier, I. A., additional, Grove, J. E., additional, Guiriec, S., additional, Hays, E., additional, Hewitt, J. W., additional, Horan, D., additional, Jóhannesson, G., additional, Kocevski, D., additional, Kuss, M., additional, Latronico, L., additional, Li, J., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Maldera, S., additional, Manfreda, A., additional, Martí-Devesa, G., additional, Mazziotta, M. N., additional, Mereu, I., additional, Meyer, M., additional, Michelson, P. F., additional, Mirabal, N., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Monzani, M. E., additional, Moretti, E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Negro, M., additional, Nuss, E., additional, Ohno, M., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Palatiello, M., additional, Paliya, V. S., additional, Paneque, D., additional, Persic, M., additional, Pesce-Rollins, M., additional, Petrosian, V., additional, Piron, F., additional, Poolakkil, S., additional, Poon, H., additional, Porter, T. A., additional, Principe, G., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Reposeur, T., additional, Ryde, F., additional, Serini, D., additional, Sgrò, C., additional, Siskind, E. J., additional, Sonbas, E., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tajima, H., additional, Takahashi, M., additional, Tak, D., additional, Thayer, J. B., additional, Torres, D. F., additional, Troja, E., additional, Valverde, J., additional, Veres, P., additional, Vianello, G., additional, von Kienlin, A., additional, Wood, K., additional, Yassine, M., additional, Zhu, S., additional, and Zimmer, S., additional
Published: 2019
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45. A Decade of Gamma-Ray Bursts Observed by Fermi-LAT : The Second GRB Catalog

Author: Ajello, M., Arimoto, M., Axelsson, Magnus, Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Bhat, P. N., Bissaldi, E., Blandford, R. D., Bonino, R., Bonnell, J., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Cheung, C. C., Chiaro, G., Ciprini, S., Costantin, D., Crnogorcevic, M., Cutini, S., Dainotti, M., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Desai, A., Desiante, R., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Grove, J. E., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Johannesson, G., Kocevski, D., Kuss, M., Latronico, L., Li, J., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Mereu, I, Meyer, M., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. , V, Negro, M., Nuss, E., Ohno, M., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Persic, M., Pesce-Rollins, M., Petrosian, V, Piron, F., Poolakkil, S., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Ryde, Felix, Serini, D., Sgro, C., Siskind, E. J., Sonbas, E., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, M., Tak, D., Thayer, J. B., Torres, D. F., Troja, E., Valverde, J., Veres, P., Vianello, G., von Kienlin, A., Wood, K., Yassine, M., Zhu, S., Zimmer, S., Ajello, M., Arimoto, M., Axelsson, Magnus, Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Bhat, P. N., Bissaldi, E., Blandford, R. D., Bonino, R., Bonnell, J., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Cheung, C. C., Chiaro, G., Ciprini, S., Costantin, D., Crnogorcevic, M., Cutini, S., Dainotti, M., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Desai, A., Desiante, R., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Grove, J. E., Guiriec, S., Hays, E., Hewitt, J. W., Horan, D., Johannesson, G., Kocevski, D., Kuss, M., Latronico, L., Li, J., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Mereu, I, Meyer, M., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. , V, Negro, M., Nuss, E., Ohno, M., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Persic, M., Pesce-Rollins, M., Petrosian, V, Piron, F., Poolakkil, S., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Ryde, Felix, Serini, D., Sgro, C., Siskind, E. J., Sonbas, E., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, M., Tak, D., Thayer, J. B., Torres, D. F., Troja, E., Valverde, J., Veres, P., Vianello, G., von Kienlin, A., Wood, K., Yassine, M., Zhu, S., and Zimmer, S.
Abstract: The Large Area Telescope (LAT) aboard the Fermi spacecraft routinely observes high-energy emission from gamma-ray bursts (GRBs). Here we present the second catalog of LAT-detected GRBs, covering the first 10 yr of operations, from 2008 to 2018 August 4. A total of 186 GRBs are found; of these, 91 show emission in the range 30-100 MeV (17 of which are seen only in this band) and 169 are detected above 100 MeV. Most of these sources were discovered by other instruments (Fermi/GBM, Swift/BAT, AGILE, INTEGRAL) or reported by the Interplanetary Network (IPN); the LAT has independently triggered on four GRBs. This catalog presents the results for all 186 GRBs. We study onset, duration, and temporal properties of each GRB, as well as spectral characteristics in the 100 MeV-100 GeV energy range. Particular attention is given to the photons with the highest energy. Compared with the first LAT GRB catalog, our rate of detection is significantly improved. The results generally confirm the main findings of the first catalog: the LAT primarily detects the brightest GBM bursts, and the high-energy emission shows delayed onset as well as longer duration. However, in this work we find delays exceeding 1 ks and several GRBs with durations over 10 ks. Furthermore, the larger number of LAT detections shows that these GRBs not only cover the high-fluence range of GBM-detected GRBs but also sample lower fluences. In addition, the greater number of detected GRBs with redshift estimates allows us to study their properties in both the observer and rest frames. Comparison of the observational results with theoretical predictions reveals that no model is currently able to explain all results, highlighting the role of LAT observations in driving theoretical models., QC 20190715
Published: 2019
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46. Bright Gamma-Ray Flares Observed in GRB 131108A

Author: Ajello, M., Arimoto, M., Asano, K., Axelsson, Magnus, Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Costantin, D., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Grondin, M. -H, Guiriec, S., Hays, E., Horan, D., Johannesson, G., Kocevski, D., Kovac'evic, M., Kuss, M., Larsson, Stefan, Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., McEnery, J. E., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Ohno, M., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Takagi, K., Tak, D., Torres, D. F., Valverde, J., Wood, K., Yamazaki, R., Yassine, M., Zhu, S., Uhm, Z. Lucas, Zhang, Bing, Ajello, M., Arimoto, M., Asano, K., Axelsson, Magnus, Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berretta, A., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Bregeon, J., Bruel, P., Buehler, R., Buson, S., Cameron, R. A., Caputo, R., Caraveo, P. A., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Costantin, D., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Di Lalla, N., Di Venere, L., Dirirsa, F. Fana, Fegan, S. J., Franckowiak, A., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Grondin, M. -H, Guiriec, S., Hays, E., Horan, D., Johannesson, G., Kocevski, D., Kovac'evic, M., Kuss, M., Larsson, Stefan, Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., McEnery, J. E., Mereu, I., Michelson, P. F., Mizuno, T., Monzani, M. E., Moretti, E., Morselli, A., Moskalenko, I. V., Negro, M., Nuss, E., Ohno, M., Omodei, N., Orienti, M., Orlando, E., Palatiello, M., Paliya, V. S., Paneque, D., Pei, Z., Persic, M., Pesce-Rollins, M., Petrosian, V., Piron, F., Poon, H., Porter, T. A., Principe, G., Racusin, J. L., Raino, S., Rando, R., Rani, B., Razzano, M., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Tajima, H., Takagi, K., Tak, D., Torres, D. F., Valverde, J., Wood, K., Yamazaki, R., Yassine, M., Zhu, S., Uhm, Z. Lucas, and Zhang, Bing
Abstract: GRB 131108A is a bright long gamma-ray burst (GRB) detected by the Large Area Telescope and the Gamma-ray Burst Monitor on board the Fermi Gamma-ray Space Telescope. Dedicated temporal and spectral analyses reveal three ?-ray flares dominating above 100 MeV, which are not directly related to the prompt emission in the Gamma-ray Burst Monitor band (10 keV?10 MeV). The high-energy light curve of GRB 131108A (100 MeV?10 GeV) shows an unusual evolution: a steep decay, followed by three flares with an underlying emission, and then a long-lasting decay phase. The detailed analysis of the ?-ray flares finds that the three flares are 6?20 times brighter than the underlying emission and are similar to each other. The fluence of each flare, (1.6?2.0)10(?6) erg cm(?2), is comparable to that of emission during the steep decay phase, 1.710(?6) erg cm(?2). The total fluence from three ?-ray flares is 5.310(?6) erg cm(?2). The three ?-ray flares show properties similar to the usual X-ray flares that are sharp flux increases, occurring in ?50% of afterglows, in some cases well after the prompt emission. Also, the temporal and spectral indices during the early steep decay phase and the decaying phase of each flare show the consistency with a relation of the curvature effect (
Published: 2019
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47. A Search for Cosmic-Ray Proton Anisotropy with the Fermi Large Area Telescope

Author: Ajello, M., Baldini, L., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Brandt, T. J., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costantin, D., Cuoco, A., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Desai, A., Digel, S. W., Di Lalla, N., Di Venere, L., Dominguez, A., Fegan, S. J., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Hayashi, K., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, Guðlaugur, Kuss, M., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Meehan, M., Mereu, I., Meyer, M., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Morselli, A., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Paliya, V. S., Paneque, D., Persic, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Principe, G., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Thayer, J. B., Torres, D. F., Troja, E., Vandenbroucke, J., Yassine, M., Zimmer, S., Ajello, M., Baldini, L., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Blandford, R. D., Bonino, R., Bottacini, E., Brandt, T. J., Bruel, P., Buson, S., Cameron, R. A., Caputo, R., Cavazzuti, E., Chen, S., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costantin, D., Cuoco, A., Cutini, S., D'Ammando, F., Luque, P. de la Torre, de Palma, F., Desai, A., Digel, S. W., Di Lalla, N., Di Venere, L., Dominguez, A., Fegan, S. J., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Green, D., Grenier, I. A., Guiriec, S., Hayashi, K., Hays, E., Hewitt, J. W., Horan, D., Jóhannesson, Guðlaugur, Kuss, M., Latronico, L., Li, J., Liodakis, I., Longo, F., Loparco, F., Lubrano, P., Maldera, S., Manfreda, A., Marti-Devesa, G., Mazziotta, M. N., Meehan, M., Mereu, I., Meyer, M., Michelson, P. F., Mirabal, N., Mitthumsiri, W., Mizuno, T., Morselli, A., Negro, M., Nuss, E., Omodei, N., Orienti, M., Orlando, E., Paliya, V. S., Paneque, D., Persic, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Principe, G., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Serini, D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Thayer, J. B., Torres, D. F., Troja, E., Vandenbroucke, J., Yassine, M., and Zimmer, S.
Abstract: The Fermi Large Area Telescope (LAT) has amassed a large data set of primary cosmic-ray protons throughout its mission. In fact, it is the largest set of identified cosmic-ray protons ever collected at this energy. The LAT' s wide field of view and full-sky survey capabilities make it an excellent instrument for studying cosmic-ray anisotropy. As a space-based survey instrument, the LAT is sensitive to anisotropy in both R.A. and decl., while ground-based observations only measure the anisotropy in R.A. We present the results of the first-ever proton anisotropy search using Fermi LAT. The data set was collected over eight years and consists of approximately 179 million protons above 78 GeV, enabling it to probe dipole anisotropy below an amplitude of 10(-3), resulting in the most stringent limits on the decl. dependence of the dipole to date. We measure a dipole amplitude delta = 3.9 +/- 1.5 x 10(-4) with a p-value of 0.01 (pretrials) for protons with energy greater than 78 GeV. We discuss various systematic effects that could give rise to a dipole excess and calculate upper limits on the dipole amplitude as a function of minimum energy. The 95% confidence level upper limit on the dipole amplitude is delta(UL) = 1.3 x 10(-3) for protons with energy greater than 78 GeV and delta(UL )= 1.2 x 10(-3) for protons with energy greater than 251 GeV.
Published: 2019
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48. MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources

Author: Ahnen, M. L. (M. L.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Arcaro, C. (C.), Baack, D. (D.), Babic, A. (A.), Banerjee, B. (B.), Bangale, P. (P.), Barres de Almeida, U. (U.), Barrio, J. A. (J. A.), Becerra Gonzalez, J. (J.), Bednarek, W. (W.), Bernardini, E. (E.), Berse, R. C. (R. Ch.), Berti, A. (A.), Bhattacharyya, W. (W.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Carosi, R. (R.), Carosi, A. (A.), Ceribella, G. (G.), Chatterjee, A. (A.), Colak, S. M. (S. M.), Colin, P. (P.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), Cumani, P. (P.), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Di Pierro, F. (F.), Dominguez, A. (A.), Prester, D. D. (D. Dominis), Dorner, D. (D.), Doro, M. (M.), Einecke, S. (S.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fernandez-Barra, A. (A.), Fidalgo, D. (D.), Fonseca, M. V. (M. V.), Font, L. (L.), Fruck, C. (C.), Galindo, D. (D.), Garcia Lopez, R. J. (R. J.), Garczarczyk, M. (M.), Gaug, M. (M.), Giammaria, P. (P.), Godinovic, N. (N.), Gora, D. (D.), Guberman, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Hassan, T. (T.), Hayashida, M. (M.), Herrera, J. (J.), Hose, J. (J.), Hrupec, D. (D.), Ishio, K. (K.), Konno, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Kuvezdic, D. (D.), Lelas, D. (D.), Lindfors, E. (E.), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Mannheim, K. (K.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Masuda, S. (S.), Mazin, D. (D.), Mielke, K. (K.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Moralejo, A. (A.), Moreno, V. (V.), Moretti, E. (E.), Nagayoshi, T. (T.), Neustroev, V. (V.), Niedzwiecki, A. (A.), Nievas Rosillo, M. (M.), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nogues, L. (L.), Paiano, S. (S.), Palacio, J. (J.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pedaletti, G. (G.), Peresano, M. (M.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), F'randini, E. (E.), Puljak, I. (I.), Garcia, J. R. (J. R.), Reichardt, I. (I.), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saito, T. (T.), Satalecka, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I.), Sobczynska, D. (D.), Stamerra, A. (A.), Strzys, M. (M.), Suric, T. (T.), Takahashi, M. (M.), Takalo, L. (L.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Treves, A. (A.), Tsujimoto, S. (S.), Vanzo, G. (G.), Vazquez Acosta, M. (M.), Vovk, I. (I.), Ward, J. E. (J. E.), Will, M. (M.), Zaric, D. (D.), Albert, A. (A.), Alfaro, R. (R.), Alvarez, C. (C.), Arceo, R. (R.), Arteaga-Velazquez, J. C. (J. C.), Avila Rojas, D. (D.), Solares, H. A. (H. A. Ayala), Becerri, A. (A.), Behnont-Moreno, E. (E.), BenZvi, S. Y. (S. Y.), Berna, A. (A.), Braun, J. (J.), Caballero-Mora, K. S. (K. S.), Capistran, T. (T.), Carraminana, A. (A.), Casanova, S. (S.), Castillo, M. (M.), Cotti, U. (U.), Cotzomi, J. (J.), Coutino de Leon, S. (S.), De Leon, C. (C.), De la Fuente, E. (E.), Diaz Hernandez, R. (R.), Dichiara, S. (S.), Dingus, B. L. (B. L.), DuVernois, M. A. (M. A.), Diaz-Velez, J. C. (J. C.), Ellsworth, R. W. (R. W.), Engel, K. (K.), Enriquez-Rivera, O. (O.), Fiorino, D. W. (D. W.), Fleischhack, H. (H.), Fraija, N. (N.), Garcia-Gonzalez, J. A. (J. A.), Garfias, F. (F.), Gonzalez-Munoz, A. (A.), Gonzalez, M. M. (M. M.), Goodman, J. A. (J. A.), Hampel-Arias, Z. (Z.), Harding, J. P. (J. P.), Hernandez, S. (S.), Hueyotl-Zahuantitla, F. (F.), Hui, C. M. (C. M.), Huntemeyer, P. (P.), Iriarte, A. (A.), Jardin-Blicq, A. (A.), Joshi, V. (V.), Kaufmann, S. (S.), Lara, A. (A.), Lauer, R. J. (R. J.), Lee, W. H. (W. H.), Lennarz, D. (D.), Leon Vargas, H. (H.), Linnemann, J. T. (J. T.), Longinotti, A. L. (A. L.), Luis-Raya, G. (G.), Luna-Garcia, R. (R.), Lopez-Coto, R. (R.), Malone, K. (K.), Marinelli, S. S. (S. S.), Martinez, O. (O.), Martinez-Castellanos, I. (I.), Martinez-Castro, J. (J.), Martinez-Huerta, H. (H.), Matthews, J. A. (J. A.), Miranda-Romagnoli, P. (P.), Moreno, E. (E.), Mostafa, M. (M.), Nayerhoda, A. (A.), Nellen, L. (L.), Newbold, M. (M.), Nisa, M. U. (M. U.), Noriega-Papaqui, R. (R.), Pelayo, R. (R.), Pretz, J. (J.), Perez-Perez, E. G. (E. G.), Ren, Z. (Z.), Rho, C. D. (C. D.), Riviere, C. (C.), Rosa-Gonzalez, D. (D.), Rosenberg, M. (M.), Ruiz-Velasco, E. (E.), Greus, F. S. (F. Salesa), Sandoval, A. (A.), Schneider, M. (M.), Arroyo, M. S. (M. Seglar), Sinnis, G. (G.), Smith, A. J. (A. J.), Springer, R. W. (R. W.), Surajbali, P. (P.), Taboada, I. (I.), Tibolla, O. (O.), Tollefson, K. (K.), Torres, I. (I.), Ukwatta, T. N. (T. N.), Vianello, G. (G.), Villasenor, L. (L.), Werner, F. (F.), Westerhoff, S. (S.), Wood, J. (J.), Yapici, T. (T.), Yodh, G. (G.), Zepeda, A. (A.), Zhou, H. (H.), Alvarez, J. D. (J. D.), Ajello, M. (M.), Baldini, L. (L.), Barbiellini, G. (G.), Berenji, B. (B.), Bissaldi, E. (E.), Blandford, R. D. (R. D.), Bonino, R. (R.), Bottacini, E. (E.), Brandt, T. J. (T. J.), Bregeon, J. (J.), Brue, P. (P.), Cameron, R. A. (R. A.), Caputo, R. (R.), Caraveo, P. A. (P. A.), Castro, D. (D.), Cavazzuti, E. (E.), Chiaro, G. (G.), Ciprini, S. (S.), Costantin, D. (D.), D'Ammando, F. (F.), de Palma, F. (F.), Desai, A. (A.), Di Lalla, N. (N.), Di Mauro, M. (M.), Di Venere, L. (L.), Favuzzi, C. (C.), Fukazawa, Y. (Y.), Funk, S. (S.), Fusco, P. (P.), Gargano, F. (F.), Gasparrini, D. (D.), Giglietto, N. (N.), Giordano, F. (F.), Giroletti, M. (M.), Glanzman, T. (T.), Green, D. (D.), Grenier, I. A. (I. A.), Guiriec, S. (S.), Harding, A. K. (A. K.), Hays, E. (E.), Hewitt, J. W. (J. W.), Horan, D. (D.), Johannesson, G. (G.), Kuss, M. (M.), Larsson, S. (S.), Liodakis, i. (i), Loparco, F. (F.), Lubrano, P. (P.), Magill, J. D. (J. D.), Maldera, S. (S.), Manfreda, A. (A.), Mazziotta, M. N. (M. N.), Mereu, I. (I.), Michelson, R. F. (R. F.), Mizuno, T. (T.), Monzani, M. E. (M. E.), Morselli, A. (A.), Moskalenko, I. V. (I. V.), Negro, M. (M.), Nuss, E. (E.), Omodei, N. (N.), Orienti, M. (M.), Orlando, E. (E.), Ormes, J. F. (J. F.), Palatiello, M. (M.), Paliya, V. S. (V. S.), Pesce-Rollins, M. (M.), Petrosian, V. (V.), Piron, F. (F.), Porter, T. A. (T. A.), Principe, G. (G.), Raino, S. (S.), Rani, B. (B.), Razzano, M. (M.), Razzaque, S. (S.), Reimer, A. (A.), Reimer, O. (O.), Sgro, C. (C.), Siskind, E. J. (E. J.), Spandre, G. (G.), Spinelli, P. (P.), Tajima, H. (H.), Thayer, J. B. (J. B.), Thompson, D. J. (D. J.), Torres, D. F. (D. F.), Torresi, E. (E.), Troja, E. (E.), Valverde, J. (J.), Wood, K. (K.), Yassine, M. (M.), Ahnen, M. L. (M. L.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Arcaro, C. (C.), Baack, D. (D.), Babic, A. (A.), Banerjee, B. (B.), Bangale, P. (P.), Barres de Almeida, U. (U.), Barrio, J. A. (J. A.), Becerra Gonzalez, J. (J.), Bednarek, W. (W.), Bernardini, E. (E.), Berse, R. C. (R. Ch.), Berti, A. (A.), Bhattacharyya, W. (W.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Carosi, R. (R.), Carosi, A. (A.), Ceribella, G. (G.), Chatterjee, A. (A.), Colak, S. M. (S. M.), Colin, P. (P.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), Cumani, P. (P.), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Di Pierro, F. (F.), Dominguez, A. (A.), Prester, D. D. (D. Dominis), Dorner, D. (D.), Doro, M. (M.), Einecke, S. (S.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fernandez-Barra, A. (A.), Fidalgo, D. (D.), Fonseca, M. V. (M. V.), Font, L. (L.), Fruck, C. (C.), Galindo, D. (D.), Garcia Lopez, R. J. (R. J.), Garczarczyk, M. (M.), Gaug, M. (M.), Giammaria, P. (P.), Godinovic, N. (N.), Gora, D. (D.), Guberman, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Hassan, T. (T.), Hayashida, M. (M.), Herrera, J. (J.), Hose, J. (J.), Hrupec, D. (D.), Ishio, K. (K.), Konno, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Kuvezdic, D. (D.), Lelas, D. (D.), Lindfors, E. (E.), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Mannheim, K. (K.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Masuda, S. (S.), Mazin, D. (D.), Mielke, K. (K.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Moralejo, A. (A.), Moreno, V. (V.), Moretti, E. (E.), Nagayoshi, T. (T.), Neustroev, V. (V.), Niedzwiecki, A. (A.), Nievas Rosillo, M. (M.), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nogues, L. (L.), Paiano, S. (S.), Palacio, J. (J.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pedaletti, G. (G.), Peresano, M. (M.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), F'randini, E. (E.), Puljak, I. (I.), Garcia, J. R. (J. R.), Reichardt, I. (I.), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saito, T. (T.), Satalecka, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I.), Sobczynska, D. (D.), Stamerra, A. (A.), Strzys, M. (M.), Suric, T. (T.), Takahashi, M. (M.), Takalo, L. (L.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Treves, A. (A.), Tsujimoto, S. (S.), Vanzo, G. (G.), Vazquez Acosta, M. (M.), Vovk, I. (I.), Ward, J. E. (J. E.), Will, M. (M.), Zaric, D. (D.), Albert, A. (A.), Alfaro, R. (R.), Alvarez, C. (C.), Arceo, R. (R.), Arteaga-Velazquez, J. C. (J. C.), Avila Rojas, D. (D.), Solares, H. A. (H. A. Ayala), Becerri, A. (A.), Behnont-Moreno, E. (E.), BenZvi, S. Y. (S. Y.), Berna, A. (A.), Braun, J. (J.), Caballero-Mora, K. S. (K. S.), Capistran, T. (T.), Carraminana, A. (A.), Casanova, S. (S.), Castillo, M. (M.), Cotti, U. (U.), Cotzomi, J. (J.), Coutino de Leon, S. (S.), De Leon, C. (C.), De la Fuente, E. (E.), Diaz Hernandez, R. (R.), Dichiara, S. (S.), Dingus, B. L. (B. L.), DuVernois, M. A. (M. A.), Diaz-Velez, J. C. (J. C.), Ellsworth, R. W. (R. W.), Engel, K. (K.), Enriquez-Rivera, O. (O.), Fiorino, D. W. (D. W.), Fleischhack, H. (H.), Fraija, N. (N.), Garcia-Gonzalez, J. A. (J. A.), Garfias, F. (F.), Gonzalez-Munoz, A. (A.), Gonzalez, M. M. (M. M.), Goodman, J. A. (J. A.), Hampel-Arias, Z. (Z.), Harding, J. P. (J. P.), Hernandez, S. (S.), Hueyotl-Zahuantitla, F. (F.), Hui, C. M. (C. M.), Huntemeyer, P. (P.), Iriarte, A. (A.), Jardin-Blicq, A. (A.), Joshi, V. (V.), Kaufmann, S. (S.), Lara, A. (A.), Lauer, R. J. (R. J.), Lee, W. H. (W. H.), Lennarz, D. (D.), Leon Vargas, H. (H.), Linnemann, J. T. (J. T.), Longinotti, A. L. (A. L.), Luis-Raya, G. (G.), Luna-Garcia, R. (R.), Lopez-Coto, R. (R.), Malone, K. (K.), Marinelli, S. S. (S. S.), Martinez, O. (O.), Martinez-Castellanos, I. (I.), Martinez-Castro, J. (J.), Martinez-Huerta, H. (H.), Matthews, J. A. (J. A.), Miranda-Romagnoli, P. (P.), Moreno, E. (E.), Mostafa, M. (M.), Nayerhoda, A. (A.), Nellen, L. (L.), Newbold, M. (M.), Nisa, M. U. (M. U.), Noriega-Papaqui, R. (R.), Pelayo, R. (R.), Pretz, J. (J.), Perez-Perez, E. G. (E. G.), Ren, Z. (Z.), Rho, C. D. (C. D.), Riviere, C. (C.), Rosa-Gonzalez, D. (D.), Rosenberg, M. (M.), Ruiz-Velasco, E. (E.), Greus, F. S. (F. Salesa), Sandoval, A. (A.), Schneider, M. (M.), Arroyo, M. S. (M. Seglar), Sinnis, G. (G.), Smith, A. J. (A. J.), Springer, R. W. (R. W.), Surajbali, P. (P.), Taboada, I. (I.), Tibolla, O. (O.), Tollefson, K. (K.), Torres, I. (I.), Ukwatta, T. N. (T. N.), Vianello, G. (G.), Villasenor, L. (L.), Werner, F. (F.), Westerhoff, S. (S.), Wood, J. (J.), Yapici, T. (T.), Yodh, G. (G.), Zepeda, A. (A.), Zhou, H. (H.), Alvarez, J. D. (J. D.), Ajello, M. (M.), Baldini, L. (L.), Barbiellini, G. (G.), Berenji, B. (B.), Bissaldi, E. (E.), Blandford, R. D. (R. D.), Bonino, R. (R.), Bottacini, E. (E.), Brandt, T. J. (T. J.), Bregeon, J. (J.), Brue, P. (P.), Cameron, R. A. (R. A.), Caputo, R. (R.), Caraveo, P. A. (P. A.), Castro, D. (D.), Cavazzuti, E. (E.), Chiaro, G. (G.), Ciprini, S. (S.), Costantin, D. (D.), D'Ammando, F. (F.), de Palma, F. (F.), Desai, A. (A.), Di Lalla, N. (N.), Di Mauro, M. (M.), Di Venere, L. (L.), Favuzzi, C. (C.), Fukazawa, Y. (Y.), Funk, S. (S.), Fusco, P. (P.), Gargano, F. (F.), Gasparrini, D. (D.), Giglietto, N. (N.), Giordano, F. (F.), Giroletti, M. (M.), Glanzman, T. (T.), Green, D. (D.), Grenier, I. A. (I. A.), Guiriec, S. (S.), Harding, A. K. (A. K.), Hays, E. (E.), Hewitt, J. W. (J. W.), Horan, D. (D.), Johannesson, G. (G.), Kuss, M. (M.), Larsson, S. (S.), Liodakis, i. (i), Loparco, F. (F.), Lubrano, P. (P.), Magill, J. D. (J. D.), Maldera, S. (S.), Manfreda, A. (A.), Mazziotta, M. N. (M. N.), Mereu, I. (I.), Michelson, R. F. (R. F.), Mizuno, T. (T.), Monzani, M. E. (M. E.), Morselli, A. (A.), Moskalenko, I. V. (I. V.), Negro, M. (M.), Nuss, E. (E.), Omodei, N. (N.), Orienti, M. (M.), Orlando, E. (E.), Ormes, J. F. (J. F.), Palatiello, M. (M.), Paliya, V. S. (V. S.), Pesce-Rollins, M. (M.), Petrosian, V. (V.), Piron, F. (F.), Porter, T. A. (T. A.), Principe, G. (G.), Raino, S. (S.), Rani, B. (B.), Razzano, M. (M.), Razzaque, S. (S.), Reimer, A. (A.), Reimer, O. (O.), Sgro, C. (C.), Siskind, E. J. (E. J.), Spandre, G. (G.), Spinelli, P. (P.), Tajima, H. (H.), Thayer, J. B. (J. B.), Thompson, D. J. (D. J.), Torres, D. F. (D. F.), Torresi, E. (E.), Troja, E. (E.), Valverde, J. (J.), Wood, K. (K.), and Yassine, M. (M.)
Abstract: The HAWC Collaboration released the 2HWC catalogue of TeV sources, in which 19 show no association with any known high-energy (HE; E ≳ 10 GeV) or very-high-energy (VHE; E ≳ 300 GeV) sources. This catalogue motivated follow-up studies by both the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) and Fermi-LAT (Large Area Telescope) observatories with the aim of investigating gamma-ray emission over a broad energy band. In this paper, we report the results from the first joint work between High Altitude Water Cherenkov (HAWC), MAGIC, and Fermi-LAT on three unassociated HAWC sources: 2HWC J2006+341, 2HWC J1907+084*, and 2HWC J1852+013*. Although no significant detection was found in the HE and VHE regimes, this investigation shows that a minimum 1° extension (at 95 per cent confidence level) and harder spectrum in the GeV than the one extrapolated from HAWC results are required in the case of 2HWC J1852+013*, whilst a simply minimum extension of 0.16° (at 95 per cent confidence level) can already explain the scenario proposed by HAWC for the remaining sources. Moreover, the hypothesis that these sources are pulsar wind nebulae is also investigated in detail.
Published: 2019

49. First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV

Author: Aguilar, M, Alberti, G, Alpat, B, Alvino, A, Ambrosi, G, Andeen, K, Anderhub, H, Arruda, L, Azzarello, P, Bachlechner, A, Barao, F, Baret, B, Barrau, A, Barrin, L, Bartoloni, A, Basara, L, Basili, A, Batalha, L, Bates, J, Battiston, R, Bazo, J, Becker, R, Becker, U, Behlmann, M, Beischer, B, Berdugo, J, Berges, P, Bertucci, B, Bigongiari, G, Biland, A, Bindi, V, Bizzaglia, S, de Boer, W, Bollweg, K, Bolmont, J, Borgia, B. Borsini, S, Boschini, MJ, Boudoul, G, Bourquin, M, Brun, P, Buenerd, M, Burger, J, Burger, W, Cadoux, F, Cai, XD, Capell, M, Casadei, D, Casaus, J, Cascioli, V, Castellini, G, Cernuda, I, Cervelli, F, Chae, MJ, Chang, YH, Chen, AI, Chen, CR, Chen, H, Cheng, GM, Chen, HS, Cheng, L, Chernoplyiokov, N, Chikanian, A, Choumilov, E, Choutko, V, Chung, CH, Clark, C, Clavero, R, Coignet, G, Commichau, V, Consolandi, C, Contin, A, Corti, C, Dios, MT, Costado Coste, B, Crespo, D, Cui, Z, Dai, M, Delgado, C, Della Torre, S, Demirkoz, B, Dennett, P, Derome, L, Di Falco, S, Diao, XH, Diago, A, Djambazov, L, Diaz, C, von Doetinchem, P, Du, WJ, Dubois, JM, Duperay, R, Duranti, M, D'Urso, D, Egorov, A, Eline, A, Eppling, FJ, Eronen, T, van Es, J, Esser, H, Falvard, A, Fiandrini, E, Fiasson, A, Finch, E, Fisher, P, Flood, K, Foglio, R, Fohey, M, Fopp, S, Fouque, N, Galaktionov, Y, Gallilee, M, Gallin Martel, L, Gallucci, G, Garcia, B, Garcia, J, Garcia Lopez, R, Garcia Tabares, L, Gargiulo, C, Gast, H, Gebauer, I, Gentile, S, Gillard, W, Giovacchini, F, Girard, L, Goglov, P, Gong, J, Goy Henningsen, C, Grandi, D, Graziani, M, Grechko, A, Gross, A, Guerri, I, de la Guia, C, Guo, KH, Habiby, M, Haino, S, Hauler, F, He, ZH, Heil, M, Heilig, J, Hermel, R, Hofer, H, Huang, ZC, Hungerford, W, Incagli, M, Ionica, M, Jacholkowska, A, Jang, WY, Jinchi, H, Jongmanns, M, Journet, L, Jungermann, L, Karpinski, W, Kim, GN, Kim, KS, Kirn, Th, Kossakowski, R, Koulemzine, A, Kounina, O, Kounine, A, Koutsenko, V, Krafczyk, MS, Laudi, E, Laurenti, G, Lauritzen, C, Lebedev, A, Lee, MW, Lee, SC, Leluc, C, Vargas, HL, Lepareur, V, Li, JQ, Li, Q, Li, TX, Li, W, Li, ZH, Lipari, P, Lin, CH, Liu, D, Liu, H, Lomtadze, T, Lu, YS, Lucidi, S, Luebelsmeyer, K, Luo, JZ, Lustermann, W, Lv, S, Madsen, J, Majka, R, Malinin, A, Mana, C, Marin, J, Martin, T, Martinez, G, Masciocchi, F, Masi, N, Maurin, D, McInturff, A, McIntyre, P, Menchaca Rocha, A, Meng, Q, Menichelli, M, Mereu, I, Millinger, M, Mo, DC, Molina, M, Mott, P, Mujunen, A, Natale, S, Nemeth, P, Ni, JQ, Nikonov, N, Nozzoli, F, Nunes, P, Obermeier, A, Oh, S, Oliva, A, Palmonari, F, Palomares, C, Paniccia, M, Papi, A, Park, WH, Pauluzzi, M, Pauss, F, Pauw, A, Pedreschi, E, Pereira, R, Perrin, E, Pierschel, G, Pilo, F, Piluso, A, Pizzolotto, C, Plyaskin, V, Pochon, J, Pohl, M, Poireau, V, Porter, S, Pouxe, J, Putze, A, Quadrani, L, Qi, XN, Rancoita, PG, Rapin, D, Ren, ZL, Ricol, JS, Riihonen, E, Rodriguez, I, Roeser, U, Rosier Lees, S, Rossi, L, Rozhkov, A, ROZZA, DAVIDE, Sabellek, A, Sagdeev, R, Sandweiss, J, Santos, B, Saouter, P, Sarchioni, M, Schael, S, Schinzel, D, Schmanau, M, Schwering, G, von Dratzig, AS, Scolieri, G, Seo, ES, Shan, BS, Shi, JY, Shi, YM, Siedenburg, T, Siedling, R, Son, D, Spada, F, Spinella, F, Steuer, M, Stiff, K, Sun, W, Sun, WH, Sun, XH, Tang, CP, Tang, XW, Tang, ZC, Tao, L, Tassan Viol, J, Ting, Samuel CC, Ting, SM, Titus, C, Tomassetti, N, Toral, F, Torsti, J, Tsai, JR, Tutt, JC, Ulbricht, J, Urban, T, Vagelli, V, Valente, E, Vannini, C, Valtonen, E, Trevino, MV, Vaurynovich, S, Vecchi, M, Vergain, M, Verlaat, B, Vescovi, C, Vialle, JP, Viertel, G, Volpini, G, Wang, D, Wang, NH, Wang, QL, Wang, RS, Wang, X, Wang, ZX, Wallraff, W, Weng, ZL, Willenbrock, M, Wlochal, M, Wu, H, Wu, KY, Wu, ZS, Xiao, WJ, Xie, S, Xiong, RQ, Xin, GM, Xu, NS, Xu, W, Yan, Q, Yang, J, Yang, M, Ye, QH, Yi, H, Yu, YJ, Yu, ZQ, Zeissler, S, Zhang, JG, Zhang, Z, Zhang, MM, Zheng, ZM, Zhuang, HL, Zhukov, V, Zichichi, A, Zuccon, P, Zurbach, C., BOELLA, GIULIANO FILIPPO, GERVASI, MASSIMO, PENSOTTI, SIMONETTA, PESSINA, GIANLUIGI EZIO, TACCONI, MAURO, M. Aguilar, G. Alberti, B. Alpat, A. Alvino, G. Ambrosi, K. Andeen, H. Anderhub, L. Arruda, P. Azzarello, A. Bachlechner, F. Barao, B. Baret, A. Barrau, L. Barrin, A. Bartoloni, L. Basara, A. Basili, L. Batalha, J. Bate, R. Battiston, J. Bazo, R. Becker, U. Becker, M. Behlmann, B. Beischer, J. Berdugo, P. Berge, B. Bertucci, G. Bigongiari, A. Biland, V. Bindi, S. Bizzaglia, G. Boella, W. de Boer, K. Bollweg, J. Bolmont, B. Borgia, S. Borsini, M. J. Boschini, G. Boudoul, M. Bourquin, P. Brun, M. Buénerd, J. Burger, W. Burger, F. Cadoux, X. D. Cai, M. Capell, D. Casadei, J. Casau, V. Cascioli, G. Castellini, I. Cernuda, F. Cervelli, M. J. Chae, Y. H. Chang, A. I. Chen, C. R. Chen, H. Chen, G. M. Cheng, H. S. Chen, L. Cheng, N. Chernoplyiokov, A. Chikanian, E. Choumilov, V. Choutko, C. H. Chung, C. Clark, R. Clavero, G. Coignet, V. Commichau, C. Consolandi, A. Contin, C. Corti, M. T. Costado Dio, B. Coste, D. Crespo, Z. Cui, M. Dai, C. Delgado, S. Della Torre, B. Demirkoz, P. Dennett, L. Derome, S. Di Falco, X. H. Diao, A. Diago, L. Djambazov, C. Díaz, P. von Doetinchem, W. J. Du, J. M. Duboi, R. Duperay, M. Duranti, D. D’Urso, A. Egorov, A. Eline, F. J. Eppling, T. Eronen, J. van E, H. Esser, A. Falvard, E. Fiandrini, A. Fiasson, E. Finch, P. Fisher, K. Flood, R. Foglio, M. Fohey, S. Fopp, N. Fouque, Y. Galaktionov, M. Gallilee, L. Gallin-Martel, G. Gallucci, B. García, J. García, R. García-López, L. García-Tabare, C. Gargiulo, H. Gast, I. Gebauer, S. Gentile, M. Gervasi, W. Gillard, F. Giovacchini, L. Girard, P. Goglov, J. Gong, C. Goy-Henningsen, D. Grandi, M. Graziani, A. Grechko, A. Gro, I. Guerri, C. de la Guía, K. H. Guo, M. Habiby, S. Haino, F. Hauler, Z. H. He, M. Heil, J. Heilig, R. Hermel, H. Hofer, Z. C. Huang, W. Hungerford, M. Incagli, M. Ionica, A. Jacholkowska, W. Y. Jang, H. Jinchi, M. Jongmann, L. Journet, L. Jungermann, W. Karpinski, G. N. Kim, K. S. Kim, Th. Kirn, R. Kossakowski, A. Koulemzine, O. Kounina, A. Kounine, V. Koutsenko, M. S. Krafczyk, E. Laudi, G. Laurenti, C. Lauritzen, A. Lebedev, M. W. Lee, S. C. Lee, C. Leluc, H. León Varga, V. Lepareur, J. Q. Li, Q. Li, T. X. Li, W. Li, Z. H. Li, P. Lipari, C. H. Lin, D. Liu, H. Liu, T. Lomtadze, Y. S. Lu, S. Lucidi, K. Lübelsmeyer, J. Z. Luo, W. Lustermann, S. Lv, J. Madsen, R. Majka, A. Malinin, C. Mañá, J. Marín, T. Martin, G. Martínez, F. Masciocchi, N. Masi, D. Maurin, A. McInturff, P. McIntyre, A. Menchaca-Rocha, Q. Meng, M. Menichelli, I. Mereu, M. Millinger, D. C. Mo, M. Molina, P. Mott, A. Mujunen, S. Natale, P. Nemeth, J. Q. Ni, N. Nikonov, F. Nozzoli, P. Nune, A. Obermeier, S. Oh, A. Oliva, F. Palmonari, C. Palomare, M. Paniccia, A. Papi, W. H. Park, M. Pauluzzi, F. Pau, A. Pauw, E. Pedreschi, S. Pensotti, R. Pereira, E. Perrin, G. Pessina, G. Pierschel, F. Pilo, A. Piluso, C. Pizzolotto, V. Plyaskin, J. Pochon, M. Pohl, V. Poireau, S. Porter, J. Pouxe, A. Putze, L. Quadrani, X. N. Qi, P. G. Rancoita, D. Rapin, Z. L. Ren, J. S. Ricol, E. Riihonen, I. Rodríguez, U. Roeser, S. Rosier-Lee, L. Rossi, A. Rozhkov, D. Rozza, A. Sabellek, R. Sagdeev, J. Sandwei, B. Santo, P. Saouter, M. Sarchioni, S. Schael, D. Schinzel, M. Schmanau, G. Schwering, A. Schulz von Dratzig, G. Scolieri, E. S. Seo, B. S. Shan, J. Y. Shi, Y. M. Shi, T. Siedenburg, R. Siedling, D. Son, F. Spada, F. Spinella, M. Steuer, K. Stiff, W. Sun, W. H. Sun, X. H. Sun, M. Tacconi, C. P. Tang, X. W. Tang, Z. C. Tang, L. Tao, J. Tassan-Viol, Samuel C. C. Ting, S. M. Ting, C. Titu, N. Tomassetti, F. Toral, J. Torsti, J. R. Tsai, J. C. Tutt, J. Ulbricht, T. Urban, V. Vagelli, E. Valente, C. Vannini, E. Valtonen, M. Vargas Trevino, S. Vaurynovich, M. Vecchi, M. Vergain, B. Verlaat, C. Vescovi, J. P. Vialle, G. Viertel, G. Volpini, D. Wang, N. H. Wang, Q. L. Wang, R. S. Wang, X. Wang, Z. X. Wang, W. Wallraff, Z. L. Weng, M. Willenbrock, M. Wlochal, H. Wu, K. Y. Wu, Z. S. Wu, W. J. Xiao, S. Xie, R. Q. Xiong, G. M. Xin, N. S. Xu, W. Xu, Q. Yan, J. Yang, M. Yang, Q. H. Ye, H. Yi, Y. J. Yu, Z. Q. Yu, S. Zeissler, J. G. Zhang, Z. Zhang, M. M. Zhang, Z. M. Zheng, H. L. Zhuang, V. Zhukov, A. Zichichi, P. Zuccon, C. Zurbach, Azzarello, Philipp, Bourquin, Maurice, Cadoux, Franck, Habiby Alaoui, Marion, Leluc, Catherine, Masciocchi, Florian, Paniccia, Mercedes, Perrin, Eric, Pohl, Martin, Rapin, Divic Jean, Saouter, Pierre, Metsähovi Radio Observatory, Aalto-yliopisto, Aalto University, OpenMETU, CERN [Genève], Centro de Investigaciones Energéticas Medioambientales y Tecnológicas [Madrid] (CIEMAT), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (INFN, Sezione di Perugia), Istituto Nazionale di Fisica Nucleare (INFN), Karlsruhe Institute of Technology (KIT), Institute for Theoretical Physics [ETH Zürich] (ITP), Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), RWTH Aachen University, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Massachusetts Institute of Technology (MIT), Laboratoire Univers et Particules de Montpellier (LUPM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Département de Physique Nucléaire et Corpusculaire [Genève] (DPNC), Université de Genève (UNIGE), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN, Sezione di Bologna), Instituto de Astrofisica de Canarias (IAC), Instituto de Matematicas (UNAM), Universidad Nacional Autónoma de México (UNAM), Istituto Nazionale di Fisica Nucleare [Sezione di Roma 1] (INFN), Istituto Nazionale di Fisica Nucleare, INFN Sezione di Pisa (INFN Sezione di Pisa), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), AMS, Aguilar, M, Alberti, G, Alpat, B, Alvino, A, Ambrosi, G, Andeen, K, Anderhub, H, Arruda, L, Azzarello, P, Bachlechner, A, Barao, F, Baret, B, Barrau, A, Barrin, L, Bartoloni, A, Basara, L, Basili, A, Batalha, L, Bates, J, Battiston, R, Bazo, J, Becker, R, Becker, U, Behlmann, M, Beischer, B, Berdugo, J, Berges, P, Bertucci, B, Bigongiari, G, Biland, A, Bindi, V, Bizzaglia, S, Boella, G, de Boer, W, Bollweg, K, Bolmont, J, Borgia, B., B, S, Boschini, M, Boudoul, G, Bourquin, M, Brun, P, Buenerd, M, Burger, J, Burger, W, Cadoux, F, Cai, X, Capell, M, Casadei, D, Casaus, J, Cascioli, V, Castellini, G, Cernuda, I, Cervelli, F, Chae, M, Chang, Y, Chen, A, Chen, C, Chen, H, Cheng, G, Cheng, L, Chernoplyiokov, N, Chikanian, A, Choumilov, E, Choutko, V, Chung, C, Clark, C, Clavero, R, Coignet, G, Commichau, V, Consolandi, C, Contin, A, Corti, C, Dios, M, Costado Coste, B, Crespo, D, Cui, Z, Dai, M, Delgado, C, Della Torre, S, Demirkoz, B, Dennett, P, Derome, L, Di Falco, S, Diao, X, Diago, A, Djambazov, L, Diaz, C, von Doetinchem, P, Du, W, Dubois, J, Duperay, R, Duranti, M, D'Urso, D, Egorov, A, Eline, A, Eppling, F, Eronen, T, van Es, J, Esser, H, Falvard, A, Fiandrini, E, Fiasson, A, Finch, E, Fisher, P, Flood, K, Foglio, R, Fohey, M, Fopp, S, Fouque, N, Galaktionov, Y, Gallilee, M, Gallin Martel, L, Gallucci, G, Garcia, B, Garcia, J, Garcia Lopez, R, Garcia Tabares, L, Gargiulo, C, Gast, H, Gebauer, I, Gentile, S, Gervasi, M, Gillard, W, Giovacchini, F, Girard, L, Goglov, P, Gong, J, Goy Henningsen, C, Grandi, D, Graziani, M, Grechko, A, Gross, A, Guerri, I, de la Guia, C, Guo, K, Habiby, M, Haino, S, Hauler, F, He, Z, Heil, M, Heilig, J, Hermel, R, Hofer, H, Huang, Z, Hungerford, W, Incagli, M, Ionica, M, Jacholkowska, A, Jang, W, Jinchi, H, Jongmanns, M, Journet, L, Jungermann, L, Karpinski, W, Kim, G, Kim, K, Kirn, T, Kossakowski, R, Koulemzine, A, Kounina, O, Kounine, A, Koutsenko, V, Krafczyk, M, Laudi, E, Laurenti, G, Lauritzen, C, Lebedev, A, Lee, M, Lee, S, Leluc, C, Vargas, H, Lepareur, V, Li, J, Li, Q, Li, T, Li, W, Li, Z, Lipari, P, Lin, C, Liu, D, Liu, H, Lomtadze, T, Lu, Y, Lucidi, S, Luebelsmeyer, K, Luo, J, Lustermann, W, Lv, S, Madsen, J, Majka, R, Malinin, A, Mana, C, Marin, J, Martin, T, Martinez, G, Masciocchi, F, Masi, N, Maurin, D, Mcinturff, A, Mcintyre, P, Menchaca Rocha, A, Meng, Q, Menichelli, M, Mereu, I, Millinger, M, Mo, D, Molina, M, Mott, P, Mujunen, A, Natale, S, Nemeth, P, Ni, J, Nikonov, N, Nozzoli, F, Nunes, P, Obermeier, A, Oh, S, Oliva, A, Palmonari, F, Palomares, C, Paniccia, M, Papi, A, Park, W, Pauluzzi, M, Pauss, F, Pauw, A, Pedreschi, E, Pensotti, S, Pereira, R, Perrin, E, Pessina, G, Pierschel, G, Pilo, F, Piluso, A, Pizzolotto, C, Plyaskin, V, Pochon, J, Pohl, M, Poireau, V, Porter, S, Pouxe, J, Putze, A, Quadrani, L, Qi, X, Rancoita, P, Rapin, D, Ren, Z, Ricol, J, Riihonen, E, Rodriguez, I, Roeser, U, Rosier Lees, S, Rossi, L, Rozhkov, A, Rozza, D, Sabellek, A, Sagdeev, R, Sandweiss, J, Santos, B, Saouter, P, Sarchioni, M, Schael, S, Schinzel, D, Schmanau, M, Schwering, G, von Dratzig, A, Scolieri, G, Seo, E, Shan, B, Shi, J, Shi, Y, Siedenburg, T, Siedling, R, Son, D, Spada, F, Spinella, F, Steuer, M, Stiff, K, Sun, W, Sun, X, Tacconi, M, Tang, C, Tang, X, Tang, Z, Tao, L, Tassan Viol, J, Ting, S, Titus, C, Tomassetti, N, Toral, F, Torsti, J, Tsai, J, Tutt, J, Ulbricht, J, Urban, T, Vagelli, V, Valente, E, Vannini, C, Valtonen, E, Trevino, M, Vaurynovich, S, Vecchi, M, Vergain, M, Verlaat, B, Vescovi, C, Vialle, J, Viertel, G, Volpini, G, Wang, D, Wang, N, Wang, Q, Wang, R, Wang, X, Wang, Z, Wallraff, W, Weng, Z, Willenbrock, M, Wlochal, M, Wu, H, Wu, K, Wu, Z, Xiao, W, Xie, S, Xiong, R, Xin, G, Xu, N, Xu, W, Yan, Q, Yang, J, Yang, M, Ye, Q, Yi, H, Yu, Y, Yu, Z, Zeissler, S, Zhang, J, Zhang, Z, Zhang, M, Zheng, Z, Zhuang, H, Zhukov, V, Zichichi, A, Zuccon, P, and Zurbach, C
Subjects: [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astrophysics::High Energy Astrophysical Phenomena, education, Dark matter, General Physics and Astronomy, Electrons, Cosmic ray, ddc:500.2, Electron, 01 natural sciences, and other elementary particle detectors, cosmic ray detectors, Nuclear physics, Physics and Astronomy (all), Positron, cosmic rays, muon, Neutrino, 0103 physical sciences, Alpha Magnetic Spectrometer, 010306 general physics, Anisotropy, Physics, Range (particle radiation), ta115, ta213, ta114, Cosmic rays, positron fraction, space experiments, 010308 nuclear & particles physics, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], pion, Observable, energy spectra and interactions, pion, and other elementary particle detectors, ELECTRONS, cosmic rays, dark matter, Physics::Accelerator Physics, High Energy Physics::Experiment, Composition
Abstract: A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8 x 10(6) positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to similar to 250 GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. The positron fraction spectrum shows no fine structure, and the positron to electron ratio shows no observable anisotropy. Together, these features show the existence of new physical phenomena. DOI: 10.1103/PhysRevLett.110.141102
Published: 2013
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50. Nuclear charge measurement with the ams-02 silicon tracker

Author: Ambrosi, G., Philipp Azzarello, Battiston, R., Bazo, J., Bertucci, B., Choumilov, E., Choutko, V., Delgado-Mendez, C., Duranti, M., D’urso, D., Fiandrini, E., Graziani, M., Habiby, M., Haino, S., Ionica, M., Mereu, I., Natale, S., Nozzoli, F., Oliva, A., Paniccia, M., Pizzolotto, C., Pohl, M., Rapin, D., Saouter, P., Tomassetti, N., Wu, K., Zhang, Z., and Zuccon, P.
Subjects: Silicon Tracker, Charged Particles, Cosmic Ray Detector
Published: 2013

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