4FGL very high-energy gamma-ray emitting blazars

Considering beamed active galactic nuclei, i.e., blazars, only a small fraction, mainly high-synchrotron-peaked BL Lacertae (BLLac) objects, have been detected in the VHE band with ground-based Cherenkov telescopes. We utilized ~16yr of Fermi Large Area Telescope (LAT) observations in the 0.1-2 TeV energy range to systematically search for potential VHE emitters in a sample of high-synchrotron-peaked ({nu}_syn_^peak^>10^15^Hz) BL Lac sources.

We identified, for the first time, 92 VHE-emitting blazars at a >=5{sigma} confidence level. A significant VHE emission was also detected from 52 sources previously reported as VHE blazars. Comparing with the general blazar population, these VHE-emitting blazars are found to be located at low redshifts (mean z=0.2+/-0.1) and exhibit bright synchrotron emission (logF_syn_^peak^=-11.2+/-0.4, in erg/cm2/s).