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arXiv 1903.04519astro-ph.HE
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X射线双星爆发的光学前兆

Optical precursors to X-ray binary outbursts

David M. Russell, D. M. Bramich, F. Lewis, A. AlMannaei, T. Al Qaissieh, A. Al Qasim, A. Al Yazeedi, M. C. Baglio, F. Bernardini, N. Elgalad, A. Gabuya, J. P. L… 展开作者

David M. Russell, D. M. Bramich, F. Lewis, A. AlMannaei, T. Al Qaissieh, A. Al Qasim, A. Al Yazeedi, M. C. Baglio, F. Bernardini, N. Elgalad, A. Gabuya, J. P. Lasota, A. Palado, P. Roche, H. Shivkumar, S. Udrescu, G. Zhang

摘要:

盘不稳定性模型预测,对于静止的X射线双星,在X射线爆发之前应该有一个光通量的增亮。追踪静止期X射线双星的X射线变化通常是不可能的,因此光学监测提供了测量爆发之间质量吸积率变化的最佳手段,并确定新爆发的开始阶段。通过我们的福克斯望远镜/拉斯坎布雷斯天文台(LCO)的定期监测,我们在X射线全天监测器检测到新的X射线双星爆发之前,定期检测它们的光学上升。我们提出的例子,检测的光学上升之前,X射线二进制的X射线检测。我们还提出了新的黑洞瞬态MAXI J1820+070(ASASSN-18 ey)与福克斯,LCO望远镜和Al Sadeem天文台在阿布扎比,阿联酋的初步光学监测。最后,我们介绍了我们的新的实时数据分析管道,“X射线二元新预警系统(XB-NEWS)”,其目的是检测和宣布新的X射线二元爆发在一天内的第一次光学检测。这将使我们能够在爆发的早期阶段触发X射线和多波长活动,以限制爆发触发机制。

英文摘要:

Disc instability models predict that for X-ray binaries in quiescence, there should be a brightening of the optical flux prior to an X-ray outburst. Tracking the X-ray variations of X-ray binaries in quiescence is generally not possible, so optical monitoring provides the best means to measure the mass accretion rate variability between outbursts, and to identify the beginning stages of new outbursts. With our regular Faulkes Telescope/Las Cumbres Observatory (LCO) monitoring we are routinely detecting the optical rise of new X-ray binary outbursts before they are detected by X-ray all-sky monitors. We present examples of detections of an optical rise in X-ray binaries prior to X-ray detection. We also present initial optical monitoring of the new black hole transient MAXI J1820+070 (ASASSN-18ey) with the Faulkes, LCO telescopes and Al Sadeem Observatory in Abu Dhabi, UAE. Finally, we introduce our new real-time data analysis pipeline, the 'X-ray Binary New Early Warning System (XB-NEWS)' which aims to detect and announce new X-ray binary outbursts within a day of first optical detection. This will allow us to trigger X-ray and multi-wavelength campaigns during the very early stages of outbursts, to constrain the outburst triggering mechanism.

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