| タイトル | 2FHL- The Second Catalog of Hard Fermi-LAT Sources |
| 著者（英） | Harding, A. K.; Thompson, D. J.; Caliandro, G. A.; Bruel, P.; Ballet, J.; Ajello, M.; Bregeon, J.; Buehler, R.; Brandt, Theresa June; Gonzalez, J. Becerra; Blandford, R. D.; Hays, E.; Bonino, R.; Bissaldi, E.; Barbiellini, G.; Bastieri, D.; Perkins, J. S.; Bloom, E. D.; Baldini, L.; Buson, S.; Atwood, W. B.; Ferrara, E. C.; Bottacini, E.; Bellazzini, R.; Ackermann, M. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2016-01-14 |
| 言語 | eng |
| 内容記述 | We present a catalog of sources detected above 50 GeV by the Fermi-Large Area Telescope (LAT) in 80 months of data. The newly delivered Pass8 event-level analysis allows the detection and characterization of sources in the 50 GeV-2 TeV energy range. In this energy band, Fermi-LAT has detected 360 sources, which constitute the second catalog of hard Fermi-LAT sources (2FHL). The improved angular resolution enables the precise localization of point sources (1.7 radius at 68% C.L.) and the detection and characterization of spatially extended sources. We find that 86% of the sources can be associated with counterparts at other wavelengths, of which the majority (75%) are active galactic nuclei and the rest (11%) are Galactic sources. Only 25% of the 2FHLsources have been previously detected by Cherenkov telescopes, implying that the 2FHL provides a reservoir of candidates to be followed up at very high energies. This work closes the energy gap between the observations performed at GeV energies by Fermi-LAT on orbit and the observations performed at higher energies byCherenkov telescopes from the ground. |
| NASA分類 | Astrophysics |
| レポートNO | GSFC-E-DAA-TN41250 |
| 権利 | Copyright |
|
