Limits on the Diffuse Gamma-Ray Background with HAWC

HAWC Collaboration

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The high-energy Diffuse Gamma-Ray Background (DGRB) is expected to be produced by unresolved extra-galactic objects such as active galactic nuclei, starburst galaxies and gamma-ray bursts. At TeV energies, observations or stringent limits on the DGRB could have significant multi-messenger implications, such as constraining the origin of TeV-PeV astrophysical neutrinos detected by IceCube. With its continuous sensitivity to gamma rays from a few hundred GeV to several hundred TeV and its wide field-of-view, the High Altitude Water Cherenkov (HAWC) observatory is well-suited to significantly improve searches for the DGRB. In this work, strict cuts have been applied to the HAWC dataset to better isolate gamma-ray air showers from background hadronic showers. The sensitivity to the DGRB was then verified using 535 days of Crab data and Monte Carlo simulations, leading to new limits on the DGRB >10 TeV.

Original languageEnglish
Title of host publicationLimits on the Diffuse Gamma-Ray Background with HAWC
Publication statusPublished - 18 Mar 2022
Event37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany
Duration: 12 Jul 202123 Jul 2021

Publication series

NameProceedings of Science
PublisherSissa Medialab Srl


Conference37th International Cosmic Ray Conference, ICRC 2021
CityVirtual, Berlin

Bibliographical note

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

All Science Journal Classification (ASJC) codes

  • General


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