Chandra observations of the anomalous X-ray pulsar 4U 0142+61

被引：39

作者：

Patel, SK

Kouveliotou, C

Woods, PM

Tennant, AF

Weisskopf, MC

Finger, MH

Wilson, CA

Gögüs, E

van der Klis, M

Belloni, T

机构：

[1] Natl Acad Sci, NRC, NSSTC, Huntsville, AL 35805 USA

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

[3] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[4] Univ Alabama, Dept Phys, NSSTC SD50, Huntsville, AL 35805 USA

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

[6] Natl Inst Nucl & High Energy Phys, Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands

[7] Osserv Astron Brera, I-23807 Merate, Lc, Italy

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 587卷 / 01期

关键词：

pulsars : individual (4U 0142+61); stars : neutron; X-rays : stars;

D O I：

10.1086/368072

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present X-ray imaging, timing, and phase-resolved spectroscopy of the anomalous X-ray pulsar 4U 0142+61 using the Chandra X-Ray Observatory. The spectrum is well described by a power-law plus black-body model with Gamma = 3.35(2), kT(BB) = 0.458(3) keV, and N-H = 0.91(2) x 10(22) cm(-2); we find no significant evidence for spectral features (0.5-7.0 keV). Time-resolved X-ray spectroscopy shows evidence for evolution in phase in either Gamma, kT(BB), or some combination thereof as a function of pulse phase. We derive a precise X-ray position for the source and determine its spin period, P = 8.68866(30) s. We have detected emission beyond 4" from the central source and extending beyond 100", likely due to dust scattering in the interstellar medium.

引用

页码：367 / 372

页数：6

共 19 条

[1] Initial performance of the aspect system on the Chandra Observatory: Post-facto aspect reconstruction [J].