A 168-s X-Ray Pulsar in the Small Magellanic Cloud Observed with ASCA
A 168-s X-Ray Pulsar in the Small Magellanic Cloud Observed with ASCA
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ASCA 观测到的小麦哲伦星云中的 168 秒 X 射线脉冲星
DOI：
10.1093/pasj/53.3.l9
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发表时间：
2001
影响因子：
2.3
通讯作者：
O. University
中科院分区：
文献类型：
--
作者：
J. Yokogawa;K. Torii;T. Kohmura;Katsuji Koyama Kyoto University;Nasda;O. University
我们报道了用ASCA在小麦哲伦星云探测到来自AX J0052.9−7157的167.8±0.2s脉动。脉动表现出与能量无关的正弦曲线。在距离60kpc处，x射线光谱用吸收硬幂律（光子指数~ 0.7）描述，光度为~ 8.8×1035 ergs−1。位置确定为（r.a., december）J2000 = (00 h52m59)。S2,−71◦57 ' 58 “)，误差半径为~ 30 ”。我们发现一颗变Be/ x射线双星RX J0052.9−7158位于30”误差圈内，也位于169-s脉冲星XTE J0054−720的10”误差圈边缘。因此，我们得出结论，它们是同一个来源，一个Be/ x射线双星脉冲星。
We report on the detection of 167.8± 0.2s pulsations from AX J0052.9−7157 in the Small Magellanic Cloud with ASCA. The pulsations show an energy-independent sinusoidal profile. The X-ray spectrum has been described by an absorbed hard power-law (photon index∼ 0.7) with a luminosity of∼ 8.8×1035 ergs−1 at a distance of 60kpc. The position is determined to be (R.A., Dec.)J2000 = (00 h52m59.s2,−71◦57′58′′), with an error radius of ∼ 30′′. We have found that a variable Be/X-ray binary RX J0052.9−7158 is located within the 30′′ error circle, and is also located at the edge of the 10′ error circle of the 169-s pulsar XTE J0054−720. We therefore conclude that these are the same source, a Be/X-ray binary pulsar.