Fermi observations of TeV-selected AGN
S. J. Fegan, D. Sanchez, Fermi LAT Collaboration: A. A. Abdo, et al

TL;DR
This paper reports Fermi LAT observations of 96 TeV-selected AGN, detecting 38 sources, analyzing their spectra and light curves, and discussing implications for TeV astronomy and gamma-ray evolution with redshift.
Contribution
It provides the first comprehensive Fermi observations of a large sample of TeV-selected AGN, identifying new potential TeV sources and analyzing spectral evolution with redshift.
Findings
38 of 96 AGN detected by Fermi LAT
Most spectra fit a power law with index < 2.0
Evidence of spectral evolution with redshift
Abstract
We report on observations of TeV-selected AGN made during the first 5.5 months of observations with the Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope (Fermi). In total, 96 AGN were selected for study, each being either (i) a source detected at TeV energies (28 sources) or (ii) an object that has been studied with TeV instruments and for which an upper-limit has been reported (68 objects). The Fermi observations show clear detections of 38 of these TeV-selected objects, of which 21 are joint GeV-TeV sources and 29 were not in the third EGRET catalog. For each of the 38 Fermi-detected sources, spectra and light curves are presented. Most can be described with a power law of spectral index harder than 2.0, with a spectral break generally required to accommodate the TeV measurements. Based on an extrapolation of the Fermi spectrum, we identify sources, not…
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