Ajello M, Atwood WB, Baldini L, Ballet J, Barbiellini G, Bastieri D, Bellazzini R, Bissaldi E, Blandford RD, Bloom ED, Bonino R, Bregeon J, Britto RJ, Bruel P, Buehler R, Buson S, Cameron RA, Caputo R, Caragiulo M, Caraveo PA, Cavazzuti E, Cecchi C, Charles E, Chekhtman A, Cheung CC, Chiaro G, Ciprini S, Cohen JM, Costantin D, Costanza F, Cuoco A, Cutini S, D'Ammando F, De Palma F, Desiante R, Digel SW, Di Lalla N, Di Mauro M, Di Venere L, Dominguez A, Drell PS, Dumora D, Favuzzi C, Fegan SJ, Ferrara EC, Fortin P, 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 IA, Grondin MH, Grove JE, Guillemot L, Guiriec S, Harding AK, Hays E, Hewitt JW, Horan D, Johannesson G, Kensei S, Kuss M, La Mura G, Larsson S, Latronico L, Lemoine-Goumard M, Li J, Longo F, Loparco F, Lott B, Lubrano P, Magill JD, Maldera S, Manfreda A, Mazziotta MN, Mcenery JE, Meyer M, Michelson PF, Mirabal N, Mitthumsiri W, Mizuno T, Moiseev AA, Monzani ME, Morselli A, Moskalenko IV, Negro M, Nuss E, Ohsugi T, Omodei N, Orienti M, Orlando E, Palatiello M, Paliya VS, Paneque D, Perkins JS, Persic M, Pesce-Rollins M, Piron F, Porter TA, Principe G, Raino S, Rando R, Razzano M, Razzaque S, Reimer A, Reimer O, Reposeur T, Parkinson PMS, Sgro C, Simone D, Siskind EJ, Spada F, Spandre G, Spinelli P, Stawarz L, Suson DJ, Takahashi M, Tak D, Thayer JG, Thayer JB, Thompson DJ, Torres DF, Torresi E, Troja E, Vianello G, Wood K, Wood M (2017)
Publication Type: Journal article
Publication year: 2017
Book Volume: 232
Journal Issue: 2
We present a catalog of sources detected above 10 GeV by the Fermi Large Area Telescope (LAT) in the first 7 years of data using the Pass 8 event-level analysis. This is the Third Catalog of Hard Fermi-LAT Sources (3FHL), containing 1556 objects characterized in the 10 GeV-2 TeV energy range. The sensitivity and angular resolution are improved by factors of 3 and 2 relative to the previous LAT catalog at the same energies (1FHL). The vast majority of detected sources (79%) are associated with extragalactic counterparts at other wavelengths, including 16 sources located at very high redshift (z > 2). Of the sources, 8% have Galactic counterparts and 13% are unassociated (or associated with a source of unknown nature). The high-latitude sky and the Galactic plane are observed with a flux sensitivity of 4.4 to 9.5 x 10(-11) ph cm(-2) s(-1), respectively (this is approximately 0.5% and 1% of the Crab Nebula flux above 10 GeV). The catalog includes 214 new gamma-ray sources. The substantial increase in the number of photons (more than 4 times relative to 1FHL and 10 times to 2FHL) also allows us to measure significant spectral curvature for 32 sources and find flux variability for 163 of them. Furthermore, we estimate that for the same flux limit of 10(-12) erg cm(-2) s(-1), the energy range above 10 GeV has twice as many sources as the range above 50 GeV, highlighting the importance, for future Cherenkov telescopes, of lowering the energy threshold as much as possible.
APA:
Ajello, M., Atwood, W.B., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D.,... Wood, M. (2017). 3FHL: The Third Catalog of Hard Fermi-LAT Sources. Astrophysical Journal Supplement Series, 232(2). https://doi.org/10.3847/1538-4365/aa8221
MLA:
Ajello, Marco, et al. "3FHL: The Third Catalog of Hard Fermi-LAT Sources." Astrophysical Journal Supplement Series 232.2 (2017).
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