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An updated survey of Active Galaxies with the HAWC gamma-ray observatory

High Energy Astrophysical Phenomena 2023-10-05 v1 Astrophysics of Galaxies

Abstract

We present an update of the survey of Active Galaxies with the High Altitude Water Cherenkov (HAWC) gamma-ray observatory. This work adds 567 days of HAWC data to the previously published survey, providing a refined analysis of an updated total exposure of 2090 days. The sample includes 138 nearby AGNs from the 3FHL catalog. We fit a modified power-law to their very high energy spectra, including the exponential attenuation caused by the Extragalactic Background Light. We found four sources with significant detections (above 5σ\sigma): the radio galaxy M87 and the BL Lac objects Mkn 421, Mkn 501 and 1ES 1215+303. We also report eight sources with a marginal detection (between 3σ\sigma and 5σ\sigma) of which seven are classified as BL Lac objects and one as a radio galaxy.

Keywords

Cite

@article{arxiv.2310.02484,
  title  = {An updated survey of Active Galaxies with the HAWC gamma-ray observatory},
  author = {Fernando Ureña-Mena and Alberto Carramiñana and Daniel Rosa-González and Anna Lia Longinotti and HAWC Collaboration},
  journal= {arXiv preprint arXiv:2310.02484},
  year   = {2023}
}

Comments

Contribution to the International Cosmic Ray Conference ICRC 2023. 7 pages, 3 figures