Polarimetric observations of GRB 011211

被引：17

作者：

Covino, S

Lazzati, D

Malesani, D

Ghisellini, G

Israel, GL

Stella, L

Cimatti, A

di Serego, S

Fiore, F

Kawai, N

Ortolani, S

Pasquini, L

Ricker, G

Saracco, P

Tagliaferri, G

Zerbi, F

机构：

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

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

[3] Osserv Astron Roma, I-00136 Rome, Italy

[4] Osserv Astrofis Arcetri, I-50125 Florence, Italy

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

[6] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy

[7] European So Observ, D-85748 Garching, Germany

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

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 392卷 / 03期

关键词：

gamma rays : bursts; polarization; radiation mechanisms : non-thermal;

D O I：

10.1051/0004-6361:20021025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present and discuss polarimetric observations performed with the VLT-UT3 (Melipal) on the afterglow of GRB 011211, similar to35 hours after the burst onset. The observations yielded a 3 sigma upper limit of P < 2.7%. We discuss this result in combination with the lightcurve evolution, that may show a break approximately at the time of our observation. We show that our upper limit is consistent with the currently favored beamed fireball geometry, especially if the line of sight was not too close to the edge of the cone.

引用

页码：865 / 868

页数：4

共 37 条

[1] ALIGHIERI SD, 1997, INSTRUMENTATION LARG, P287
[2] The polarization variability in the optical afterglow of GRB 990712
Björnsson, G
Lindfors, EJ
[J]. ASTROPHYSICAL JOURNAL, 2000, 541 (02) : L55 - L57
[3] The prompt energy release of gamma-ray bursts using a cosmological k-correction
Bloom, JS
Frail, DA
Sari, R
[J]. ASTRONOMICAL JOURNAL, 2001, 121 (06) : 2879 - 2888
[4] BLOOM JS, 2001, GCN, P1193
[5] BOROZDIN KN, 2002, UNPUB APJ
[6] BURUD I, 2002, GCN, P1213
[7] CLARKE D, 1983, ASTRON ASTROPHYS, V126, P260
[8] PKS 0116+082: An optically variable compact steep-spectrum source in a narrow-line radio galaxy
Cohen, HH
Vermeulen, RC
Ogle, PM
Tran, HD
Goodrich, RW
[J]. ASTROPHYSICAL JOURNAL, 1997, 484 (01) : 193 - 201
[9] Covino S, 1999, ASTRON ASTROPHYS, V348, pL1
[10] FOSBURY RAE, 1993, MESSENGER, V74, P11

← 1 2 3 4 →