Shrestha, M, Steele, IA, Kobayashi, S, Smith, RJ, Jermak, HE, Piascik, A and Mundell, CG (2023) GRB 210619B: First Gamma-Ray Burst Detection by the Novel Polarimeter MOPTOP. Research Notes of the AAS, 7 (6). p. 118.

Full text not available from this repository. Please see publisher or open access link below:

Abstract

GRB 210619B was a bright long gamma-ray burst (GRB) which was optically followed up by the novel polarimeter MOPTOP on the Liverpool Telescope. This was the first GRB detection by the instrument since it began science observations. MOPTOP started observing the GRB 1388 s after the Swift Burst Alert Telescope trigger. The R band light-curve decays following a broken power law with a break time of 2948 s after the trigger. The decay index values are α1 = 0.84 ± 0.03 (pre-break) and α2 = 0.54 ± 0.02 (post-break), indicating that the observation was most probably during the forward shock-dominated phase. We find a polarization upper limit of ∼7%. In the forward shock we expect the polarization to mostly come from dust in the local ambient medium which only produces low degrees of polarization. Hence our non-detection of polarization is as expected for this particular burst.

Item Type:	Article
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	American Astronomical Society
SWORD Depositor:	A Symplectic
Date Deposited:	13 Nov 2024 15:13
Last Modified:	13 Nov 2024 15:13
DOI or ID number:	10.3847/2515-5172/acdb64
URI:	https://researchonline.ljmu.ac.uk/id/eprint/24764

View Item