Spatial Coincidence between Ultra-high Energy Cosmic Rays and TeV Gamma Rays in the Direction of GRB 980425/SN 1998bw

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https://iopscience.iop.org/article/10.3847/2515-5172/acd006

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https://doi.org/10.3847/2515-5172/acd006
 http://hdl.handle.net/11603/28094

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

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https://orcid.org/0000-0002-7021-5838

Date

2023-04

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journal articles
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Citation of Original Publication

Mirabal, Nestor. "Spatial Coincidence between Ultra-high Energy Cosmic Rays and TeV Gamma Rays in the Direction of GRB 980425/SN 1998bw" Research Notes of the AAS 7, no. 4 (April 2023). https://doi.org/10.3847/2515-5172/acd006.

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Attribution 4.0 International (CC BY 4.0)

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Abstract

Gamma-ray bursts (GRBs) have long been suspected as possible ultra-high energy cosmic ray (UHECR) accelerators. In this brief note, I report that GRB 980425/SN 1998bw falls within the region of interest (ROI) with the highest significance in an all-sky blind search for magnetically induced effects in the arrival directions of UHECRs conducted by the Pierre Auger Collaboration with events detected up to to 2018 August 31. There is also report in the literature of delayed TeV emission in archival Fermi LAT observations from the direction of GRB 980425/SN 1998bw. The combined probability that two distinct cosmic ray acceleration signatures in two different multimessenger experiments may appear at the same spatial location by chance is estimated to be between 1.62 × 10⁻³ and 0.0157.