Search for very-high-energy photons from Gamma-ray bursts with HAWC

Detections of very-high-energy (VHE; > 100 GeV) photons from Gamma-ray bursts (GRBs) can provide fundamental information on the involved radiative processes, physical composition of the ejecta and acceleration processes. The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is the best g...

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Bibliographic Details
Published inarXiv.org
Main Authors Fraija, Nissim, González, M Magdalena, the HAWC Collaboration
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.08.2019
Subjects
Acceleration
Ejecta
Field of view
Gamma ray bursts
Gamma rays
High altitude
Photons
Red shift
Satellite instruments
Satellite-borne instruments
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Summary:Detections of very-high-energy (VHE; > 100 GeV) photons from Gamma-ray bursts (GRBs) can provide fundamental information on the involved radiative processes, physical composition of the ejecta and acceleration processes. The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is the best gamma-ray instrument to study transient phenomena over a long period of time from 100 GeV to 100 TeV. Its large field of view and duty cycle (> 95%) allow it to search blindly for sources of GRBs and to follow up on external alerts from satellite instruments, such as Fermi and Swift, searching for their VHE counterpart. We present results from the on-going GRB monitoring program and VHE upper limits of the latest interesting low-redshift and/or powerful bursts in HAWC's field of view: GRB 170206A, GRB 170817A, GRB 180720B and GRB 190114C.
ISSN:2331-8422