GRB 210619B optical afterglow polarization

被引：14

作者：

Mandarakas, N. ^{[1
,2
]}

Blinov, D. ^{[1
,2
]}

Aguilera-Dena, D. R. ^{[1
]}

Romanopoulos, S. ^{[1
,2
]}

Pavlidou, V. ^{[1
,2
]}

Tassis, K. ^{[1
,2
]}

Antoniadis, J. ^{[1
,3
]}

Kiehlmann, S. ^{[1
,2
]}

Lychoudis, A. ^{[2
]}

Kataivatis, L. F. Tsemperof ^{[2
]}

机构：

[1] Fdn Res & Technol Hellas, Inst Astrophys, 100 Nikolaou Plastira str Vassilika Vouton, Iraklion 70013, Crete, Greece

[2] Univ Crete, Dept Phys, Vasilika Bouton, Iraklion 70013, Greece

[3] Max Planck Inst Radioastron, Auf Hugel 69, D-53121 Bonn, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 670卷

基金：

欧洲研究理事会;

关键词：

polarization; relativistic processes; methods: observational; techniques: polarimetric; gamma-ray burst: individual: GRB210619B; gamma rays: stars; GAMMA-RAY BURSTS; LINEAR-POLARIZATION; EMISSION; ROBOPOL; LIGHT; FIELD; MAP;

D O I：

10.1051/0004-6361/202244802

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 5967 - 8245 s after the burst, using the RoboPol instrument at the Skinakas observatory. Results. We report a 5 sigma detection of polarization P=1.5 +/- 0.3 at polarization angle EVPA=8 +/- 6 degrees. 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.

引用

页数：5

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