Polarization evolution of the GRB 020405 afterglow

被引：30

作者：

Covino, S

Malesani, D

Ghisellini, G

Lazzati, D

Alighieri, SD

Stefanon, M

Cimatti, A

Della Valle, M

Fiore, F

Goldoni, P

Kawai, N

Israel, GL

Le Floc'h, E

Mirabel, IF

Ricker, G

Saracco, P

Stella, L

Tagliaferri, G

Zerbi, FM

机构：

[1] INAF Osservatorio Astron Brera, I-23807 Merate, LC, Italy

[2] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[3] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy

[4] Osserv Astron Roma, INAF, I-00136 Rome, Italy

[5] Ctr Etud Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France

[6] Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1033 Buenos Aires, DF, Argentina

[7] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[8] MIT, Ctr Space Res, Cambridge, MA 02139 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 400卷 / 01期

关键词：

gamma rays : bursts; polarization; radiation mechanisms : non-thermal; GAMMA-RAY BURSTS; LINEAR-POLARIZATION; LIGHT CURVES; PARAMETERS; GRB-990510;

D O I：

10.1051/0004-6361:20030133

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Polarization measurements for the optical counterpart to GRB 020405 are presented and discussed. Our observations were performed with the VLT-UT3 (Melipal) during the second and third night after the gamma-ray burst discovery. The polarization degree (and the position angle) appears to be constant between our two observations at a level around 1.5 divided by 2%. The polarization can be intrinsic but it is not possible to unambiguously exclude that a substantial fraction of it is induced by dust in the host galaxy.

引用

页码：L9 / L12

页数：4

共 43 条

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