2023A&A...670A.144M

Query : 2023A&A...670A.144M

2023A&A...670A.144M - Astronomy and Astrophysics, volume 670A144 (2023/2-1)

GRB 210619B optical afterglow polarization.

MANDARAKAS N., BLINOV D., AGUILERA-DENA D.R., ROMANOPOULOS S., PAVLIDOU V., TASSIS K., ANTONIADIS J., KIEHLMANN S., LYCHOUDIS A. and TSEMPEROF KATAIVATIS L.F.

Abstract (from CDS):


Aims. We report on the follow-up of the extremely bright long gamma-ray burst (GRB) GRB 210619B with optical polarimetry.
Methods. We conducted optopolarimetric observations of the optical afterglow of GRB 210619B in the SDSS-r band in the time window ∼5967 - 8245 s after the burst, using the RoboPol instrument at the Skinakas observatory.
Results. We report a 5σ detection of polarization P = 1.5 ± 0.3 at polarization angle EVPA = 8 ± 6°. We find that during our observations, the polarization is likely constant. These values have been corrected for polarization induced by the interstellar medium of the Milky Way and host-induced polarization is likely negligible. Thus the polarization we quote is intrinsic to the GRB afterglow.

Abstract Copyright: © The Authors 2023

Journal keyword(s): polarization - relativistic processes - methods: observational - techniques: polarimetric - gamma-ray burst: individual: GRB210619B - gamma rays: stars

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Fermi bn091208410 gB 01 57 38.50 +16 52 50.7           ~ 220 0
2 GRB 191016A gB 02 01 04.67 +24 30 35.3           ~ 31 0
3 GRB 090102 gB 08 32 59.50 +33 06 25.7           ~ 253 0
4 GRB 120308A gB 14 36 20.02 +79 41 12.0           ~ 79 0
5 GRB 210619B gB 21 18 52.39 +33 51 00.2           ~ 93 0
6 GRB 131030A gB 23 00 16.14 -05 22 05.2           ~ 126 0

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