Chandra Observation of the Anomalous X-Ray Pulsar 1E 1841-045
Chandra Observation of the Anomalous X-Ray Pulsar 1E 1841-045
复制标题
钱德拉对异常 X 射线脉冲星 1E 1841-045 的观测
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
N. Kawai
中科院分区：
文献类型：
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作者：
M. Morii;R. Sato;J. Kataoka;N. Kawai
本文介绍了对一颗反常X射线脉冲星（AXP）1 E1841 -045的{it Chandra} ACIS CC模式观测结果。这是第一次观察到脉冲星光谱在宽的能量范围内空间区分从周围的SNR，Kes 73。与其他AXP一样，相位积分谱符合幂律加黑体模型。光谱参数为γ = 2.0 pm 0.3$，kT_{
m BB} = 0.44 pm 0.02$ keV，$NH = 2.54^{+0.15}-0.13 第10集{22}
m cm}^{-2}$。该光子指数比其他AXP显着平坦，并且类似于静止状态下的软伽马射线中继器（SGR）。脉冲波形为双峰型，第二个峰具有明显的硬谱。在温度和光子指数不变的情况下，各相的光谱符合幂律加黑体模型。当用两个黑体模型拟合时，我们得到了同样好的拟合。这些结果可以解释为存在两个不同能谱的发射区。
We present the results from the {it Chandra} ACIS CC mode observation of an anomalous X-ray pulsar (AXP) 1E 1841-045. This is the first observation in which the pulsar spectrum in wide energy range is spatially discriminated from the surrounding SNR, Kes 73. Like other AXPs, the phase-integrated spectrum is fitted well with power-law plus blackbody model. The spectral parameters are $Gamma = 2.0 pm 0.3$, $kT_{
m BB} = 0.44 pm 0.02$ keV, and $N_H = 2.54^{+0.15}_{-0.13} imes 10^{22} {
m cm}^{-2}$. This photon index is significantly flatter than the other AXPs, and resemble to soft gamma-ray repeaters (SGRs) in the quiescent state. The pulse profile is double-peaked, and we found that the second peak has significantly hard spectrum. The spectra of all phases are consistent with power-law plus blackbody model with constant temperature and photon index. When fitted with two blackbody model, we obtained similarly good fit. These results can be interpreted that there are two emission regions with different energy spectra.