2019/08/19 by A. Carramiñana, Carramiñana, Alberto, D. Rosa‐González +5
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Particle Detector Development and Performance
paper · pdf · doi:10.48550/arxiv.1908.06831
openalex publication_date 2019/08/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The High Altitude Water Cherenkov Gamma-Ray Observatory has been accumulating a progressively deeper exposure of the TeV sky since its inauguration in March 2015. Located at geographical latitude +19^∘N, HAWC has been able to perform a deep and unbiased survey of two thirds of the sky. We analyzed three years of HAWC data searching for long term persistent emission from a redshift limited (z≤ 0.3) sample of active galactic nuclei drawn from the \it Fermi-LAT 3FHL catalog. The HAWC dataset confirms the high significance detection of the two nearest BL Lac objects, Mrk 421 and Mrk 501, and sets limits for the rest of the sample, down to integrated photon fluxes of order N(>0.5~\rm TeV)\lesssim 10-12 \rm cm-2s-1. We present and discuss some of the results of this survey, focusing on individual objects of particular interest.