A giant γ-ray flare from the magnetar SGR 1806-20

被引：427

作者：

Palmer, DM

Barthelmy, S

Gehrels, N

Kippen, RM

Cayton, T

Kouveliotou, C

Eichler, D

Wijers, RAMJ

Woods, PM

Granot, J

Lyubarsky, YE

Ramirez-Ruiz, E

Barbier, L

Chester, M

Cummings, J

Fenimore, EE

Finger, MH

Gaensler, BM

Hullinger, D

Krimm, H

Markwardt, CB

Nousek, JA

Parsons, A

Patel, S

Sakamoto, T

Sato, G

Suzuki, M

Tueller, J

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] NASA, Goddard Space Flight Ctr, Univ Space Res Assoc, Greenbelt, MD 20771 USA

[3] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35805 USA

[4] Univ Space Res Assoc, NSSTC, Huntsville, AL 35805 USA

[5] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[6] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands

[7] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA

[8] Inst Adv Study, Princeton, NJ 08540 USA

[9] Penn State Univ, University Pk, PA 16802 USA

[10] CNR, Washington, DC 20001 USA

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

[12] Univ Maryland, College Pk, MD 20742 USA

[13] Inst Space & Astronaut Sci, JAXA, Kanagawa 2298510, Japan

[14] Saitama Univ, Sakura Ku, Saitama 3388570, Japan

来源：

NATURE | 2005年 / 434卷 / 7037期

关键词：

D O I：

10.1038/nature03525

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two classes of rotating neutron stars-soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars-are magnetars(1), whose X-ray emission is powered by a very strong magnetic field (B approximate to 10(15) G). SGRs occasionally become 'active', producing many short X-ray bursts. Extremely rarely, an SGR emits a giant flare with a total energy about a thousand times higher than in a typical burst(2-4). Here we report that SGR 1806-20 emitted a giant flare on 27 December 2004. The total (isotropic) flare energy is 2 x 10(46) erg, which is about a hundred times higher than the other two previously observed giant flares. The energy release probably occurred during a catastrophic reconfiguration of the neutron star's magnetic field. If the event had occurred at a larger distance, but within 40 megaparsecs, it would have resembled a short, hard gamma-ray burst, suggesting that flares from extragalactic SGRs may form a subclass of such bursts.

引用

页码：1107 / 1109

页数：3

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