SWIFT J1753.5–0127: A Surprising Optical/X-Ray Cross-Correlation Function
SWIFT J1753.5–0127: A Surprising Optical/X-Ray Cross-Correlation Function
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DOI：
10.1086/590906
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发表时间：
2008-06
期刊：
影响因子：
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通讯作者：
M. Durant;P. Gandhi;T. Shahbaz;A. Fabian;Jonathan M. Miller;V. Dhillon;T. Marsh
中科院分区：
文献类型：
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作者：
M. Durant;P. Gandhi;T. Shahbaz;A. Fabian;Jonathan M. Miller;V. Dhillon;T. Marsh
我们用RXTE和ULTRACAM对SWIFT J1753.5-0127进行了同步光学和X射线观测，而该系统一直处于相对明亮的低/硬状态。在互相关函数中，我们发现光发射有一个宽的负峰，领先X射线发射几秒，在正滞后处有一个较小的正峰。这与类似的有趣系统XTE J1118+480所看到的明显不同，这是第一次如此清晰地测量到这种相关函数。我们提出了一个物理场景的起源。
We have conducted simultaneous optical and X-ray observations of SWIFT J1753.5–0127 with RXTE and ULTRACAM, while the system persisted in its relatively bright low/hard state. In the cross-correlation function, we find that the optical emission, with a broad negative peak, leads the X-ray emission by a few seconds and has a smaller positive peak at positive lags. This is markedly different from what was seen for the similarly interesting system XTE J1118+480, and it is the first time that such a correlation function has been so clearly measured. We suggest a physical scenario for its origin.