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arXiv 0709.0633astro-ph
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小麦哲伦云的INTEGRAL观测

INTEGRAL observations of the Small Magellanic Cloud

V. A. McBride, M. J. Coe, A. J. Bird, A. J. Dean, A. B. Hill, K. E. McGowan, M. P. E. Schurch, A. Udalski, I. Soszynski, M. Finger, C. A. Wilson, R. H. D. Corbet, I. Negueruela

摘要:

第一个完整的观测小麦哲伦云(在2003年进行)的报告,其中两个来源被清楚地检测到。第一个来源,SMC X-1,显示了硬X射线日食,其脉冲周期的测量表明,长期的自旋持续了30年。第二个来源可能是一个高质量的X射线双星,在IBIS光变曲线中显示出6.8秒的潜在周期性。一个确切的X射线或光学对应不能指定,但一些建议的同行进行了讨论。这些可能的对应物之一在~2.7d处显示出强相干光调制,这与测量的硬X射线脉冲周期一起将导致该积分源被归类为第四个已知的高质量罗氏瓣溢出系统。

英文摘要:

The first INTEGRAL observations of the Small Magellanic Cloud (carried out in 2003) are reported in which two sources are clearly detected. The first source, SMC X-1, shows a hard X-ray eclipse and measurements of its pulse period indicate a continuation of the long-term spin-up now covering ~30 years. The second source is likely to be a high mass X-ray binary, and shows a potential periodicity of 6.8s in the IBIS lightcurve. An exact X-ray or optical counterpart cannot be designated, but a number of proposed counterparts are discussed. One of these possible counterparts shows a strong coherent optical modulation at ~2.7d, which, together with the measured hard X-ray pulse period, would lead to this INTEGRAL source being classified as the fourth known high mass Roche lobe overflow system.

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