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.
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页数：5
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