Results 1 to 10 of about 20,555 (198)

TeV Dark Matter Searches in the Extragalactic Gamma-ray Sky

Galaxies, 2022
High-energetic gamma rays from astrophysical targets constitute a unique probe for annihilation or decay of heavy particle dark matter (DM). After several decades, diverse null detections have resulted in strong constraints for DM particle masses up to ...
Moritz Hütten, Daniel Kerszberg
doaj   +1 more source

GLAST Launch Fact Sheet [PDF]

, 2008
This four-page color brochure describes the science of NASA’s GLAST mission, as well as providing tables that summarize the instrumental parameters and the mission participants.
Lynn cominsky
core  

The Statistical Analysis of GeV Spectral Breaks in Bright Gamma-Ray Flat-spectrum Radio Quasars

The Astrophysical Journal Supplement Series
We present the statistical results of GeV spectral breaks of bright gamma-ray flat-spectrum radio quasars (FSRQs) in the energy range of 0.1–10 GeV based on New Pass 8 data of the Large Area Telescope on board Fermi Gamma-Ray Space Telescope.
K. R. Zhu, J. M. Chen, L. Zhang
doaj   +1 more source

On the Spectral Shape of Non-recycled γ-ray Pulsars [PDF]

Journal of Astronomy and Space Sciences, 2016
More than 100 γ−ray pulsars have been discovered by the Fermi Gamma-ray Space Telescope. With a significantly enlarged sample size, it is possible to compare the properties of different classes. Radio-quiet (RQ) γ−ray pulsars form a distinct population,
Chung-Yue Hui, Jongsu Lee
doaj   +1 more source

Fermi Large Area Telescope Observations of the Cosmic-Ray Induced gamma-ray Emission of the Earth's Atmosphere

, 2009
We report on measurements of the cosmic-ray induced gamma-ray emission of Earth's atmosphere by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. The LAT has observed the Earth during its commissioning phase and with a dedicated Earth-
Abdo, A. A., Ackermann, M., Ajello, M., Atwood, W. B., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Bernji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Celik, Ö., Charles, E., Chekthman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., de Palma, F., Digel, S. W., do Couto e Silva, E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M.-H., Grove, J. E., Guillemot, L., Guiriec, S., Hays, E., Horan, D., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knödlseder, J., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovelette, M. N., Lubrano, P., Makeev, A., Mazziotta, M. N., McEnery, J. E., Meurer, C., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., 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., Rochester, L. S., Rodriguez, A. Y., Roth, M., Sadrozinski, H. F.-W., Sander, A., Saz Parkinson, P. M., Sgro, C., Share, G. H., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Takahashi, H., 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., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Ylinen, T., Ziegler, M.   +154 more
core   +3 more sources

Fermi-LAT upper limits on gamma-ray emission from colliding wind binaries

, 2012
Context: Colliding wind binaries (CWBs) are thought to give rise to a plethora of physical processes including acceleration and interaction of relativistic particles. Observation of synchrotron radiation in the radio band confirms there is a relativistic
Egberts, K., Reimer, A., Reimer, O., Werner, M.   +3 more
core   +1 more source

SU(2)X vector DM and Galactic Center gamma-ray excess

Physics Letters B, 2015
An unbroken Z3 symmetry remains when a local SU(2)X symmetry is broken spontaneously by a quadruplet. The gauge boson χμ(χ¯μ) carries the dark charge and is the candidate of dark matter (DM).
Chuan-Hung Chen, Takaaki Nomura
doaj   +1 more source

Multivariate time series classification of Fermi-detected gamma-ray transients using convolutional-recurrent neural networks

Machine Learning: Science and Technology
Fermi gamma-ray Space Telescope has detected a diverse range of gamma-ray transients since its launch in 2008. Over the years, Fermi has accumulated an extensive public archive of transient events.
Arpan Aryam John, Krushna Govind Shete, Shabnam Iyyani, Saptarshi Bej   +3 more
doaj   +1 more source

Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the Supernova Remnant Cassiopeia A

, 2013
We report on observations of the supernova remnant Cassiopeia A in the energy range from 100 MeV to 100 GeV using 44 months of observations from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope.
,, /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Iceland U., Funk, S., Johannesson, G., Lande, J., Tibaldo, L., Uchiyama, Y., Yuan, Y.   +7 more
core   +2 more sources

Fermi-LAT Discovery of a Gamma-Ray Outburst from the Peculiar Compact Steep Spectrum Radiogalaxy 3C 216

The Astrophysical Journal
3C 216 is an extragalactic radio source classified as a compact steep spectrum (CSS) object, associated with the source 4FGL J0910.0+4257 detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope.
Federica Giacchino, Giovanni La Mura, Stefano Ciprini, Dario Gasparrini, Marcello Giroletti, Marco Laurenti   +5 more
doaj   +1 more source