Hard X-ray spectra of anomalous X-ray pulsars

被引：0

作者：

Wang, W. ^{[1
]}

机构：

[1] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany

来源：

ASTROPHYSICS OF COMPACT OBJECTS | 2007年 / 968卷

关键词：

pulsars : individual; Gamma-rays : observations;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We search for the hard X-ray tails of anomalous X-ray pulsars (AXPs) from 15-200 keV with two years of INTEGRAL/SPI and SWIFT/BAT observations. Two AXPs (1E1841-045 and 4U0142+614) are detected with SPI. And four AXPs (1E1841-045, 4U0142+614, IRXS J1708-40 and 1E2259+586) are detected with SWIFT. Their hard X-ray spectra above 20 keV can be described by a power law with photon index of similar to 0.5 - 1.5. The possible turn-off energy for 1E1841-045 has been determined at around 120 keV. This non-thermal hard emission should have a different origin from the soft thermal emission of AXPs below 10 keV Modelling pulse profiles with the 3-D simulations of magnetosphere in magnetars compared with observed pulse profiles suggests that hard X-ray tails would originate in the close-field magnetosphere.

引用

页码：101 / 103

页数：3

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