Multiwavelength observations of the soft gamma repeater SGR 1900+14 during its 2001 April activation

被引：53

作者：

Kouveliotou, C

Tennant, A

Woods, PM

Weisskopf, MC

Hurley, K

Fender, RP

Garrington, ST

Patel, SK

Gögüs, E

机构：

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

[2] NASA, Marshall Space Flight Ctr, NSSTC, Huntsville, AL 35805 USA

[3] NASA, MSFC, Huntsville, AL 35812 USA

[4] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

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

[6] Univ Amsterdam, Inst High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands

[7] Univ Manchester, Nuffield Radio Astron Labs, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England

[8] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 558卷 / 01期

关键词：

stars : magnetic fields; stars : neutron;

D O I：

10.1086/323496

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The soft gamma repeater SGR 1900+14 became active on 2001 April 18 after about 2 years of quiescence; it had remained at a very low state of activity since the fall of 1998, when it exhibited extraordinary flaring. We have observed the source in the gamma-rays and X-rays with Ulysses and Chandra and in the radio with MERLIN. We report here the confirmation of a two-component X-ray spectrum (power law + blackbody), indicating emission from the neutron star surface. We have determined that there is a dust halo, due to scattering in the interstellar medium, surrounding the source that extends up to greater than or similar to 100 " from the center of SGR 1900+14.

引用

页码：L47 / L50

页数：4

共 26 条

[1]

Arnaud KA, 1996, ASTR SOC P, V101, P17

[2] Observations of a possible new soft gamma repeater, SGR 1801-23 [J].