The strongly polarized afterglow of GRB 020405

被引：52

作者：

Bersier, D

McLeod, B

Garnavich, PM

Holman, MJ

Grav, T

Quinn, J

Kaluzny, J

Challis, PM

Bower, RG

Wilman, DJ

Heyl, JS

Holland, ST

Hradecky, V

Jha, S

Stanek, KZ

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[3] Copernicus Astron Ctr, PL-00716 Warsaw, Poland

[4] Univ Durham, Dept Phys, Durham DH1 3LE, England

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 583卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

gamma rays : bursts; polarization;

D O I：

10.1086/368158

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report polarization measurements and photometry for the optical afterglow of the gamma-ray burst GRB 020405. We measured a highly significant 9.9% polarization (in V band) 1.3 days after the burst and argue that it is intrinsic to the GRB. The light-curve decay is well fitted by a t(-1.72) power law; we do not see any evidence for a break between 1.24 and 4.3 days after the burst. We discuss these measurements in the light of several models of GRB afterglows.

引用

页码：L63 / L66

页数：4

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