Constraints on microphysical parameters of GRBs using HAWC

Dichiara, S.; González, M. M.; Fraija, N.

doi:10.22323/1.312.0068

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Grb 170206a1

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2019

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“…Therefore time windows of duration T 90 , 3×T 90 and 10×T 90 were selected. The most restrictive upper limit is found and presented here for the time window of T90 [30]. The isotropic energy was computed taking into account the Band function parameters reported in the [31].…”

Section: Grb 170206amentioning

confidence: 99%

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

Fraija¹,

González²

2019

Preprint

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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 ongoing 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.

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Section: Grb 170206amentioning

confidence: 99%