High Galactic latitude Fermi sources of gamma-rays with energies above 100 GeV

Abstract

We present a catalog of sources of very high energy (E>100 GeV) gamma-rays detected by the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope at Galactic latitudes |b|>=10 degrees. We cross-correlate the directions of individual photons with energies above 100 GeV detected by Fermi/LAT with the first year Fermi catalog of sources detected at lower energies. We find a significant correlation between the arrival directions of the highest energy photons and positions of Fermi sources, with the possibility of chance coincidences at the level of 1e-45. We present a list of Fermi sources contributing to the correlation signal. A similar analysis is performed to cross-correlate the catalog of BL Lac objects with the highest energy photons detected by Fermi. We produce a catalog of high Galactic latitude Fermi sources visible at 100-300 GeV energies. The catalog is divided into two parts. The first part contains a list of 50 higher significance sources among which there can be three possible false detections. The second part of the catalog contains a list of 25 lower significance sources, among which six are possibly false detections. Finally we identify eight additional sources from the cross-correlation analysis with the BL Lac catalog. The reported sources of E>100 GeV gamma-rays span a broad range of redshifts, up to z~1. Most of the sources are BL Lac type objects. Only 17 out of 83 objects in our list were previously reported as VHE gamma-ray sources.

11 pages, 19 figures

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• Multi-messenger gamma-ray counterpart of the IceCube neutrino signal
• Degree-scale GeV "jets" from active and dead TeV blazars
• Discovery of VHE gamma-ray emission from the BL Lac object B3 2247+381 with the MAGIC telescopes
• Fermi Large Area Telescope Detection of Two Very-High-Energy (E>100 GeV) Gamma-ray Photons from the z = 1.1 Blazar PKS 0426-380
• Discovery of very high energy gamma-ray emission from the BL Lac object PKS 0301-243 with H.E.S.S
• Brightest Fermi-LAT Flares of PKS 1222+216: Implications on Emission and Acceleration Processes
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• Extragalactic Very-High-Energy gamma-ray background
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• Location of gamma-ray flaring region in quasar 4C +21.35
• Galactic sources of E>100 GeV gamma-rays seen by Fermi telescope
• Search for Very-High-Energy Gamma Rays from the z = 0.896 Quasar 4C +55.17 with the MAGIC telescopes
• Challenging the high-energy emission zone in FSRQs