Sub-MeV band observation of a hard burst from AXP 1E 1547.0-5408 with the Suzaku Wide-band All-sky Monitor
Sub-MeV band observation of a hard burst from AXP 1E 1547.0-5408 with the Suzaku Wide-band All-sky Monitor
复制标题
使用朱雀宽带全天监视器对 AXP 1E 1547.0-5408 的硬爆发进行亚兆电子伏波段观测
DOI：
10.1093/pasj/psv011
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发表时间：
2015
影响因子：
2.3
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
T. Yasuda;W. B. Iwakiri;M. S. Tashiro; Y. Terada;T. Kouzu;T. Enoto;et al.
2.1秒的异常X射线脉冲星1 E 1547.0−5408在2009年1月22日表现出一次X射线爆发，发出大量的短爆发。朱雀号上的宽带全天空监测器（WAM）在1月22日00：57-17：02 UT期间从1 E 1547.0−5408方向检测到至少254个160 keV-6.2 MeV波段的爆发。其中一个爆发发生在06：45：13，产生了0.5-6.2 MeV范围内最明亮的通量，平均通量为0.16-6.2 MeV，外推25 keV-2 MeV的通量分别约为1 × 10−5erg cm−2s− 1和3 × 10− 4 erg cm−2。堆积校正后，时间分辨的WAM光谱的这个突发很好地拟合在0.16-6.2兆电子伏的范围内由两个组件的模型，具体地说，一个黑体加上光学薄的热韧致辐射或组合的黑体和幂律分量与指数截止。这些结果进行了比较与以前的作品报告的持续发射和较弱的短脉冲，然后由相同的爆发。
The 2.1-s anomalous X-ray pulsar 1E 1547.0−5408 exhibited an X-ray outburst on 2009 January 22, emitting a large number of short bursts. The wide-band all-sky monitor (WAM) on-board Suzaku detected at least 254 bursts in the 160 keV–6.2 MeV band over the period of January 22 00:57–17:02 UT from the direction of 1E 1547.0−5408. One of these bursts, which occurred at 06:45:13, produced the brightest fluence in the 0.5–6.2 MeV range, with an averaged 0.16–6.2 MeV flux and extrapolated 25 keV–2 MeV fluence of about 1 × 10−5erg cm−2s−1and about 3 × 10−4erg cm−2, respectively. After pile-up corrections, the time-resolved WAM spectra of this burst were well-fitted in the 0.16–6.2 MeV range by two-component models; specifically, a blackbody plus an optically thin thermal bremsstrahlung or a combination of a blackbody and a power-law component with an exponential cut-off. These results are compared with previous works reporting the persistent emission and weaker short bursts followed by the same outburst.