HAWC Gamma-Ray survey, AGNs at TeV photon energies

We analyzed 1523days of HAWC live data acquired over four and a half years, in a follow-up analysis of 138 nearby (z<0.3) active galactic nuclei from the Third Catalog of Hard Fermi-LAT sources culminating within 40{deg} of the zenith at Sierra Negra, the HAWC site.

This search for persistent TeV emission used a maximum- likelihood analysis assuming intrinsic power-law spectra attenuated by pair production of gamma-ray photons with the extragalactic background light. HAWC clearly detects persistent emission from Mkn421 and Mkn501, the two brightest blazars in the TeV sky, at 65{sigma} and 17{sigma} level, respectively. Marginal evidence, just above the 3{sigma} level, was found for three other known very high-energy emitters: the radio galaxy M87 and the BL Lac objects VERJ0521+211 and 1ES1215+303, the latter two at z~0.1.