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arXiv 1607.04264astro-ph.HE
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RCW 103中1 E 161348-5055磁星性质的证据

Evidence for the magnetar nature of 1E 161348-5055 in RCW 103

A. D'Aì, P. A. Evans, D. N. Burrows, N. P. M. Kuin, D. A. Kann, S. Campana, A. Maselli, P. Romano, G. Cusumano, V. La Parola, S. D. Barthelmy, A. P. Beardmore, … 展开作者

A. D'Aì, P. A. Evans, D. N. Burrows, N. P. M. Kuin, D. A. Kann, S. Campana, A. Maselli, P. Romano, G. Cusumano, V. La Parola, S. D. Barthelmy, A. P. Beardmore, S. B. Cenko, M. De Pasquale, N. Gehrels, J. Greiner, J. A. Kennea, S. Klose, A. Melandri, J. A. Nousek, J. P. Osborne, D. M. Palmer, B. Sbarufatti, P. Schady, M. H. Siegel, G. Tagliaferri, R. Yates, S. Zane

摘要:

我们报告了2016年6月22日由Swift/BAT监测器捕获的来自超新星遗迹RCW 103的明亮,短暂,结构化的X射线爆发的检测,以及Swift/XRT,Swift/UVOT和光学/NIR GROND探测器的后续活动。这种闪光的特点,如持续时间和光谱形状,是符合典型的短脉冲从软伽玛中继站观察。BAT误差圆在68%的置信范围内包围着星云1 E161348 -5055中心的点状X射线源。它的性质长期以来一直存在争议,因为X射线的周期为6.67小时,这可能表明它是一颗非常缓慢的脉动中子星,或者是一个非常紧凑的X射线双星系统的轨道周期。我们发现,在BAT触发前20分钟,1 E161348 -5055的软X射线发射比2年前测量的高出约100倍,表明爆发已经开始。通过比较爆发前两年和BAT事件后两年的源的光谱和定时特征,我们发现,除了光度和光谱形状的变化,6.67小时的脉冲轮廓也发生了显着变化,相对于其低通量轮廓有明显的相移。UV/光学/NIR观察结果未显示1 E161348 -5055位置处的任何对应物。基于这些发现,我们将BAT爆发与1 E161348 -5055联系起来,我们将其归类为磁星,并将6.67小时的周期性确定为磁星的自旋周期。

英文摘要:

We report on the detection of a bright, short, structured X-ray burst coming from the supernova remnant RCW 103 on 2016 June 22 caught by the Swift/BAT monitor, and on the follow-up campaign made with Swift/XRT, Swift/UVOT and the optical/NIR GROND detector. The characteristics of this flash, such as duration, and spectral shape, are consistent with typical short bursts observed from soft gamma repeaters. The BAT error circle at 68 per cent confidence range encloses the point-like X-ray source at the centre of the nebula, 1E161348-5055. Its nature has been long debated due to a periodicity of 6.67 hr in X-rays, which could indicate either an extremely slow pulsating neutron star, or the orbital period of a very compact X-ray binary system. We found that 20 min before the BAT trigger, the soft X-ray emission of 1E161348-5055 was a factor of ~100 higher than measured 2 yr earlier, indicating that an outburst had already started. By comparing the spectral and timing characteristics of the source in the two years before the outburst and after the BAT event, we find that, besides a change in luminosity and spectral shape, also the 6.67 hr pulsed profile has significantly changed with a clear phase shift with respect to its low-flux profile. The UV/optical/NIR observations did not reveal any counterpart at the position of 1E161348-5055. Based on these findings, we associate the BAT burst with 1E161348-5055, we classify it as a magnetar, and pinpoint the 6.67 hr periodicity as the magnetar spin period.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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