The polarization variability in the optical afterglow of GRB 990712

被引：6

作者：

Björnsson, G ^{[1
]}

Lindfors, EJ ^{[1
]}

机构：

[1] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 541卷 / 02期

关键词：

gamma rays : bursts; polarization; radiation mechanisms : nonthermal;

D O I：

10.1086/312907

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a recent paper, Rol and colleagues present evidence for a variable polarization in the optical afterglow following the gamma-ray burst GRB 990712. The variation is highly significant, but the position angle appears to be time independent. Contrary to their conclusion, we point out that this can in fact be explained with existing afterglow models, namely, that of a laterally expanding jet.

引用

页码：L55 / L57

页数：3

共 19 条

[1] The discovery and broadband follow-up of the transient afterglow of GRB 980703
Bloom, JS
Frail, DA
Kulkarni, SR
Djorgovski, SG
Halpern, JP
Marzke, RO
Patton, DR
Oke, JB
Horne, KD
Gomer, R
Goodrich, R
Campbell, R
Moriarty-Schieven, GH
Redman, RO
Feldman, PA
Costa, E
Masetti, N
[J]. ASTROPHYSICAL JOURNAL, 1998, 508 (01) : L21 - L24
[2] Covino S, 1999, ASTRON ASTROPHYS, V348, pL1
[3] Radio-to-X-ray spectrum of GRB 970508 on 1997 May 21.0 UT
Galama, TJ
Wijers, RAMJ
Bremer, M
Groot, PJ
Strom, RG
Kouveliotou, C
van Paradijs, J
[J]. ASTROPHYSICAL JOURNAL, 1998, 500 (02) : L97 - L100
[4] Polarization light curves and position angle variation of beamed gamma-ray bursts
Ghisellini, G
Lazzati, D
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 309 (01) : L7 - L11
[5] Gamma-ray burst afterglow: Polarization and analytic light curves
Gruzinov, A
Waxman, E
[J]. ASTROPHYSICAL JOURNAL, 1999, 511 (02) : 852 - 861
[6] Optical and radio observations of the afterglow from GRB 990510: Evidence for a jet
Harrison, FA
Bloom, JS
Frail, DA
Sari, R
Kulkarni, SR
Djorgovski, SG
Axelrod, T
Mould, J
Schmidt, BP
Wieringa, MH
Wark, RM
Subrahmanyan, R
McConnell, D
McCarthy, PJ
Schaefer, BE
McMahon, RG
Markze, RO
Firth, E
Soffitta, P
Amati, L
[J]. ASTROPHYSICAL JOURNAL, 1999, 523 (02) : L121 - L124
[7] Hjorth J, 2000, ASTROPHYS J, V534, pL147, DOI 10.1086/312683
[8] Polarimetric constraints on the optical afterglow emission from GRB 990123
Hjorth, J
Björnsson, G
Andersen, MI
Caon, N
Cairós, LM
Castro-Tirado, AJ
Osorio, MRZ
Pedersen, H
Costa, E
[J]. SCIENCE, 1999, 283 (5410) : 2073 - 2075
[9] HOLLAND S, 2000, IN PRESS A A
[10] Israel GL, 1999, ASTRON ASTROPHYS, V348, pL5

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