Results 1 to 10 of about 309 (157)

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

THE LARGE AREA TELESCOPE ON THEFERMI GAMMA-RAY SPACE TELESCOPEMISSION [PDF]

The Astrophysical Journal, 2009
(Abridged) The Large Area Telescope (Fermi/LAT, hereafter LAT), the primary instrument on 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 below 20 MeV to more than 300 GeV.
W. B. Atwood1, A. A. Abdo2, 58, M. Ackermann3, W. Althouse3, B. Anderson1, M. Axelsson4, L. Baldini5, J. Ballet6, D. L. Band7, 8, G. Barbiellini9, 10, J. Bartelt3, D. Bastieri11, 12, B. M. Baughman13, K. Bechtol3, D. Bédérède14, F. Bellardi5, R. Bellazzini5, B. Berenji3, G. F. Bignami15, D. Bisello11, 12, E. Bissaldi16, R. D. Blandford3, E. D. Bloom3, J. R. Bogart3, BONAMENTE, EMANUELE, 18, J. Bonnell8, A. W. Borgland3, A. Bouvier3, J. Bregeon5, A. Brez5, M. Brigida19, 20, P. Bruel21, T. H. Burnett22, G. Busetto11, 12, G. A. Caliandro19, 20, R. A. Cameron3, P. A. Caraveo23, S. Carius24, P. Carlson25, J. M. Casandjian6, E. Cavazzuti26, M. Ceccanti5, CECCHI, Claudia, E. Charles3, A. Chekhtman2, 27, C. C. Cheung8, J. Chiang3, R. Chipaux28, A. N. Cillis8, S. Ciprini17, 18, R. Claus3, J. Cohen Tanugi29, S. Condamoor3, J. Conrad25, 30, R. Corbet8, L. Corucci5, L. Costamante3, S. Cutini26, D. S. Davis8, 31, D. Decotigny21, M. DeKlotz32, C. D. Dermer2, A. de Angelis33, S. W. Digel3, E. do Couto e. Silva3, P. S. Drell3, R. Dubois3, D. Dumora34, 35, Y. Edmonds3, D. Fabiani5, C. Farnier29, C. Favuzzi19, 20, D. L. Flath3, P. Fleury21, W. B. Focke3, S. Funk3, P. Fusco19, 20, F. Gargano20, D. Gasparrini26, N. Gehrels8, 36, F. X. Gentit37, S. Germani17, 18, B. Giebels21, N. Giglietto19, 20, P. Giommi26, F. Giordano19, 20, T. Glanzman3, G. Godfrey3, I. A. Grenier6, M. H. Grondin34, 35, J. E. Grove2, L. Guillemot34, 35, S. Guiriec29, G. Haller3, A. K. Harding8, P. A. Hart3, E. Hays8, S. E. Healey3, M. Hirayama8, 31, L. Hjalmarsdotter4, R. Horn32, R. E. Hughes13, G. Jóhannesson3, G. Johansson24, A. S. Johnson3, R. P. Johnson1, T. J. Johnson8, 36, W. N. Johnson2, T. Kamae3, H. Katagiri38, J. Kataoka39, A. Kavelaars3, N. Kawai40, 39, H. Kelly3, M. Kerr22, W. Klamra25, J. Knödlseder41, M. L. Kocian3, N. Komin6, 29, F. Kuehn13, M. Kuss5, D. Landriu6, L. Latronico5, B. Lee42, S. H. Lee3, M. Lemoine Goumard34, 35, A. M. Lionetto43, 44, F. Longo9, 10, F. Loparco19, 20, B. Lott34, 35, M. N. Lovellette2, P. Lubrano17, 18, G. M. Madejski3, A. Makeev27, 2, B. Marangelli19, 20, M. M. Massai5, M. N. Mazziotta20, J. E. McEnery8, N. Menon5, 32, C. Meurer30, P. F. Michelson3, 59, M. Minuti5, N. Mirizzi19, 20, W. Mitthumsiri3, T. Mizuno38, A. A. Moiseev7, C. Monte19, 20, M. E. Monzani3, E. Moretti9, 10, A. Morselli43, 44, I. V. Moskalenko3, S. Murgia3, T. Nakamori39, S. Nishino38, P. L. Nolan3, J. P. Norris45, E. Nuss29, M. Ohno46, T. Ohsugi38, N. Omodei5, D. Paneque3, M. Pesce Rollins5, F. Piron29, A. Reimer3, T. Reposeur34, A. Sander13, D. A. Smith34, T. Tanaka3, TOSTI, Gino, V. Vitale43   +209 more
openaire   +10 more sources

Fermi Gamma-ray Space Telescope Observations of Gamma-ray Pulsars [PDF]

AIP Conference Proceedings, 2009
To appear in the Proceedings of the 6th Workshop on Science with the New Generation of High Energy Gamma-Ray Experiments (SciNeGHE '08), held in Padova, 8-10 October 2008, Eds. D.
P. M. Saz Parkinson, Denis Bastieri, Riccardo Rando   +2 more
openaire   +2 more sources

Testing high energy neutrino emission from the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) sources. [PDF]

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021
Presented at the 37th International Cosmic Ray Conference (ICRC2021), Berlin, Germany; PoS (ICRC2021 ...
G('a)mez, A. G., Fraija, N., Aguilar-Ruiz, E., Joshi, J. C., de Diego Onsurbe, J. A., Marinelli, A.   +5 more
openaire   +3 more sources

EARLY FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF THE QUASAR 3C 454.3 [PDF]

The Astrophysical Journal, 2009
This is the first report of Fermi Gamma-ray Space Telescope observations of the quasar 3C 454.3, which has been undergoing pronounced long-term outbursts since 2000. The data from the Large Area Telescope (LAT), covering 2008 July 7 - October 6, indicate strong, highly variable gamma-ray emission with an average flux of ~3 x 10^{-6} photons cm^{-2} s^{-
Abdo, A. A., Ackermann, M., Ajello, M., Atwood, W. B., Axelsson, M., Baldini, L., Ballet, Jean, Barbiellini, G., Bastieri, D., Battelino, M., Baughman, B. M., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, Pascal, Burnett, T. H., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Charles, E., Chaty, S., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cominsky, L. R., Conrad, J., Costamante, L., Cutini, S., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Do Couto e Silva, E., Donato, D., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Focke, W. B., Foschini, L., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giommi, P., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M.-H., Grove, J. E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A. K., Hartman, R. C., Hayashida, M., Hays, E., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Johnson, R. P., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knödlseder, Jürgen, Kocian, M. L., Kuehn, F., Kuss, M., Latronico, L., Lee, S.-H., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Massaro, E., Mazziotta, M. N., Mcenery, J. E., Mcglynn, S., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Raino, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Reyes, L. C., Ritz, S., Rochester, L. S., Rodriguez, A. Y., Rahoui, F., Ryde, F., Sadrozinski, H. F.-W., Sambruna, R., Sanchez, D., Sander, A., Saz Parkinson, P. M., Sgrò, C., Shaw, M. S., Smith, David Stanley, Smith, P. D., Spandre, G., Spinelli, P., Starck, Jean-Luc, Strickman, M. S., Suson, D. J., Tajima, H., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vilchez, N., Villata, M., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Ylinen, T., Zensus, J. A., Ziegler, M.   +180 more
openaire   +15 more sources

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

GAMMA-RAY BURST PREDICTIONS FOR THEFERMI GAMMA RAY SPACE TELESCOPE [PDF]

The Astrophysical Journal, 2009
9 pages, 6 figures, Accepted for publication in ApJ; this version contains an additional section that discusses the fluence estimates and uncertainties for EGRET ...
Le, Truong, Dermer, Charles D.
openaire   +2 more sources

Fermi Gamma-Ray Space Telescope

, 2022
The Fermi Gamma-ray Space Telescope, a key mission in multiwavelength and multimessenger studies, has been surveying the gamma-ray sky from its low-Earth orbit since 2008. Its two scientific instruments, the Gamma-ray Burst Monitor (GBM) and the Large Area Telescope (LAT), cover 8 orders of magnitude in photon energy.
Thompson, David J., Wilson-Hodge, Colleen A.   +1 more
openaire   +2 more sources