Results 1 to 10 of about 19,895 (210)

Jet Physics of Accreting Super-Massive Black Holes in the Era of the Fermi Gamma-ray Space Telescope [PDF]

Frontiers in Astronomy and Space Sciences, 2017
The Fermi Gamma-ray Space Telescope with its main instrument on-board, the Large Area Telescope (LAT), opened a new era in the study of high-energy emission from Active Galactic Nuclei (AGN).
Filippo D'Ammando, Filippo D'Ammando
doaj   +2 more sources

Gamma-ray Emission from Globular Clusters [PDF]

Journal of Astronomy and Space Sciences, 2016
Over the last few years, the data obtained using the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope has provided new insights on high-energy processes in globular clusters, particularly those involving compact objects such as ...
Pak-Hin T. Tam, Chung Y. Hui, Albert K. H. Kong   +2 more
doaj   +4 more sources

A 34.5 day quasi-periodic oscillation in γ-ray emission from the blazar PKS 2247–131 [PDF]

Nature Communications, 2018
PKS 2247–131 is an active galaxy that has been emitting gamma-ray flares since October 2016. Here, the authors used data obtained with the Fermi Gamma-ray Space Telescope to find that PKS 2247–131 presents a relatively short, month-like flux oscillation ...
Jianeng Zhou, Zhongxiang Wang, Liang Chen, Paul J. Wiita, Jithesh Vadakkumthani, Nidia Morrell, Pengfei Zhang, Jujia Zhang   +7 more
doaj   +2 more sources

Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm [PDF]

Iranian Journal of Astronomy and Astrophysics, 2023
Gamma rays are the most energetic photons in the electromagnetic spectrum, detected with ground-based and space-based detectors in different energy ranges from sources in our galaxy and beyond.
Mehran Soor, Fatemeh Akhondi, Hadi Hedayati   +2 more
doaj   +1 more source

GRAINE project: precise gamma-ray observations with balloon-borne emulsion telescope [PDF]

EPJ Web of Conferences, 2019
Observation of cosmic gamma rays is important in the understanding of high-energy objects or phenomena in the universe. Since 2008, the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope (Fermi-LAT) has surveyed the sub-GeV/GeV gamma-ray ...
Rokujo Hiroki
doaj   +1 more source

γ-Ray and ultra-high energy neutrino background suppression due to solar radiation

Physics Letters B, 2023
The Sun emits copious amounts of photons and neutrinos in an approximately spatially isotropic distribution. Diffuse γ-rays and ultra-high energy (UHE) neutrinos from extragalactic sources may subsequently interact and annihilate with the emitted solar ...
Shyam Balaji
doaj   +1 more source

Explaining the GeV excess with exploding black holes

Physics Letters B, 2023
Black holes may form in present-day collapse of microscopic structures of dark matter. We show that, if microstructure black holes (MSBH) with mass m∼1013 g are produced, the spectrum of gamma rays from their evaporation agrees remarkably well with the ...
Zachary S.C. Picker, Alexander Kusenko
doaj   +1 more source

The Third Fermi Large Area Telescope Catalog of Gamma-Ray Pulsars

The Astrophysical Journal, 2023
We present 294 pulsars found in GeV data from the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. Another 33 millisecond pulsars (MSPs) discovered in deep radio searches of LAT sources will likely reveal pulsations once phase-connected
D. A. Smith, S. Abdollahi, M. Ajello, M. Bailes, L. Baldini, J. Ballet, M. G. Baring, C. Bassa, J. Becerra Gonzalez, R. Bellazzini, A. Berretta, B. Bhattacharyya, E. Bissaldi, R. Bonino, E. Bottacini, J. Bregeon, P. Bruel, M. Burgay, T. H. Burnett, R. A. Cameron, F. Camilo, R. Caputo, P. A. Caraveo, E. Cavazzuti, G. Chiaro, S. Ciprini, C. J. Clark, I. Cognard, A. Corongiu, P. Cristarella Orestano, M. Crnogorcevic, A. Cuoco, S. Cutini, F. D’Ammando, A. de Angelis, M. E. DeCesar, S. De Gaetano, R. de Menezes, J. Deneva, F. de Palma, N. Di Lalla, F. Dirirsa, L. Di Venere, A. Domínguez, D. Dumora, S. J. Fegan, E. C. Ferrara, A. Fiori, H. Fleischhack, C. Flynn, A. Franckowiak, P. C. C. Freire, Y. Fukazawa, P. Fusco, G. Galanti, V. Gammaldi, F. Gargano, D. Gasparrini, F. Giacchino, N. Giglietto, F. Giordano, M. Giroletti, D. Green, I. A. Grenier, L. Guillemot, S. Guiriec, M. Gustafsson, A. K. Harding, E. Hays, J. W. Hewitt, D. Horan, X. Hou, F. Jankowski, R. P. Johnson, T. J. Johnson, S. Johnston, J. Kataoka, M. J. Keith, M. Kerr, M. Kramer, M. Kuss, L. Latronico, S.-H. Lee, D. Li, J. Li, B. Limyansky, F. Longo, F. Loparco, L. Lorusso, M. N. Lovellette, M. Lower, P. Lubrano, A. G. Lyne, Y. Maan, S. Maldera, R. N. Manchester, A. Manfreda, M. Marelli, G. Martí-Devesa, M. N. Mazziotta, J. E. McEnery, I. Mereu, P. F. Michelson, M. Mickaliger, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, M. E. Monzani, A. Morselli, M. Negro, R. Nemmen, L. Nieder, E. Nuss, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, M. Palatiello, D. Paneque, G. Panzarini, A. Parthasarathy, M. Persic, M. Pesce-Rollins, R. Pillera, H. Poon, T. A. Porter, A. Possenti, G. Principe, S. Rainò, R. Rando, S. M. Ransom, P. S. Ray, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, N. Renault-Tinacci, R. W. Romani, M. Sánchez-Conde, P. M. Saz Parkinson, L. Scotton, D. Serini, C. Sgrò, R. Shannon, V. Sharma, Z. Shen, E. J. Siskind, G. Spandre, P. Spinelli, B. W. Stappers, T. E. Stephens, D. J. Suson, S. Tabassum, H. Tajima, D. Tak, G. Theureau, D. J. Thompson, O. Tibolla, D. F. Torres, J. Valverde, C. Venter, Z. Wadiasingh, N. Wang, N. Wang, P. Wang, P. Weltevrede, K. Wood, J. Yan, G. Zaharijas, C. Zhang, W. Zhu   +170 more
doaj   +1 more source

Fermi detection of delayed GeV emission from the short GRB 081024B [PDF]

, 2010
We report on the detailed analysis of the high-energy extended emission from the short Gamma-Ray Burst (GRB) 081024B, detected by the Fermi Gamma-ray Space Telescope.
A. A. Abdo, A. A. Moiseev, A. Bouvier, A. Brez, A. Chekhtman, A. de Angelis, A. J. van der Horst, A. K. Harding, A. Makeev, A. Morselli, A. P. Waite, A. Reimer, A. S. Johnson, A. Sander, A. Tramacere, A. von Kienlin, A. W. Borgland, A. Y. Rodriguez, Abdo ., Abdo ., Asano, Asano, Atwood ., B. Berenji, B. Giebels, B. L. Winer, B. Lott, B. M. Baughman, Bartlett, Bloom, Bottcher, C. Cecchi, C. D. Dermer, C. Farnier, C. Favuzzi, C. Kouveliotou, C. Meegan, C. Meurer, C. Monte, C. Sgrò, C. Wilson-Hodge, Cenko, Connaughton, Corsi, D. A. Smith, D. Bastieri, D. Dumora, D. F. Torres, D. Gasparrini, D. Horan, D. J. Suson, D. J. Thompson, D. Kocevski, D. Paneque, D. Parent, D. Sanchez, Dermer, Dermer, E. Bissaldi, E. Bonamente, E. Charles, E. D. Bloom, E. do Couto e Silva, E. Hays, E. J. Siskind, E. Moretti, E. Nuss, E. Orlando, E. Troja, F. de Palma, F. Gargano, F. Giordano, F. Kuehn, F. Longo, F. Loparco, F. Piron, F. Ryde, G. A. Caliandro, G. Barbiellini, G. Fishman, G. Godfrey, G. Jóhannesson, G. M. Madejski, G. Spandre, G. Tagliaferri, G. Tosti, Gehrels, Ghirlanda, Granot, Guidorzi, Guidorzi, H. F.-W. Sadrozinski, H. Katagiri, H. Tajima, H. Takahashi, He, I. A. Grenier, I. V. Moskalenko, J. B. Thayer, J. Ballet, J. Bregeon, J. Chiang, J. Cohen-Tanugi, J. Conrad, J. D. Scargle, J. E. Grove, J. E. McEnery, J. F. Ormes, J. G. Thayer, J. Granot, J. H. Panetta, J. Kataoka, J. Knödlseder, J. Lande, J. M. Burgess, J. M. Casandjian, J. P. Norris, J. Ripken, K. Asano, K. Bechtol, K. S. Wood, K. Toma, Kaneko, L. Baldini, L. Guillemot, L. Latronico, L. R. Cominsky, L. S. Rochester, L. Tibaldo, Le, M. Ackermann, M. Ajello, M. Axelsson, M. Brigida, M. E. Monzani, M. Frailis, M. Hayashida, M. Kerr, M. Kuss, M. L. Kocian, M. Lemoine-Goumard, M. N. Lovellette, M. N. Mazziotta, M. Ohno, M. Pepe, M. Pesce-Rollins, M. Razzano, M. Roth, M. S. Briggs, M. S. Jackson, M. S. Strickman, M. Stamatikos, M. Ziegler, M.-H. Grondin, Mazets, Meegan, N. Gehrels, N. Giglietto, N. Kawai, N. Komin, N. Omodei, N. Vilchez, Narayan, Norris, O. Reimer, Ohno, Omodei, P. A. Caraveo, P. Bruel, P. D. Smith, P. F. Michelson, P. Fortin, P. Fusco, P. Giommi, P. L. Nolan, P. Lubrano, P. M. Saz Parkinson, P. Mészáros, P. N. Bhat, P. S. Drell, P. Spinelli, P. Wang, R. A. Cameron, R. Bellazzini, R. Claus, R. D. Blandford, R. Dubois, R. E. Hughes, R. H. Haynes, R. M. Kippen, R. Preece, R. Rando, R. Yamazaki, Rosswog, Ruffert, S. Buson, S. Carrigan, S. Ciprini, S. Cutini, S. Funk, S. Germani, S. Guiriec, S. J. Fegan, S. McBreen, S. McGlynn, S. Murgia, S. Rainò, S. Razzaque, S. Ritz, S. W. Digel, T. A. Porter, T. Glanzman, T. H. Burnett, T. Kamae, T. L. Schalk, T. L. Usher, T. Mizuno, T. Nakamori, T. Ohsugi, T. Reposeur, T. Tanaka, T. Ylinen, V. Chaplin, V. Connaughton, V. Pelassa, V. Vasileiou, V. Vitale, W. B. Atwood, W. B. Focke, W. Mitthumsiri, W. N. Johnson, W. S. Paciesas, X. F. Wu, Y. Fukazawa, Y. Hanabata, Y. Uchiyama, Zhang, Ö. Çelik   +237 more
core   +9 more sources

XStorm: A New Gamma Ray Spectrometer for Detection of Close Proximity Gamma Ray Glows and TGFs

Journal of Geophysical Research: Atmospheres, Volume 128, Issue 24, 27 December 2023., 2023
Abstract In this paper, we present XStorm, a gamma ray spectrometer developed to detect gamma ray glows and terrestrial gamma ray flashes (TGFs) in close proximity. Measurements are mostly planned to take place on balloon campaigns but also on the ground using bigger detectors.
Melody Pallu, Sebastien Celestin, Yanis Hazem, François Trompier, Gaël Patton   +4 more
wiley   +1 more source