A modified direct demodulation method applied to Insight-HXMT Galactic plane scanning survey
A modified direct demodulation method applied to Insight-HXMT Galactic plane scanning survey
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DOI：
10.1016/j.jheap.2020.02.002
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发表时间：
2020-06
影响因子：
3.8
通讯作者：
J. Guan;F. Lu;Shu Zhang;Lingming Song;Yong Chen;Jinyuan Liao;Chengkui Li;Y. Nang;N. Sai
中科院分区：
文献类型：
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作者：
J. Guan;F. Lu;Shu Zhang;Lingming Song;Yong Chen;Jinyuan Liao;Chengkui Li;Y. Nang;N. Sai
我们提出了一种改进的直接解调（DD）方法，用于检测快速变化的对象与洞察HXMT银河平面调查，这是专门用于狩猎新的瞬变和监测已知的变量源。改进的DD方法的新奇在于重构了修正的响应矩阵，其中适当地处理了源的变异性。蒙特卡罗（MC）模拟结果表明，它的功率检测可变源与不同的时间尺度，从而更准确的定位和精确的流量监测。将该方法应用于Insight-HXMT银河平面巡天数据表明，快速爆发器MXB 1730-335可以很好地检测到II型爆发，平均速率为2个爆发min-1，以众所周知的弛豫振荡的方式。
We present a modified direct demodulation (DD) method for the detection of fast variable objects with the Insight-HXMT Galactic plane survey, which is dedicated to hunting for new transients and monitoring known variable sources. The novelty of the improved DD method is the reconstruction of the modified response matrix, in which the variability of a source is properly handled. Monte Carlo (MC) simulation results demonstrate its power for the detection of variable sources with different time scales, resulting in more accurate location and precise flux monitoring. The application of the method to the Insight-HXMT Galactic plane survey data reveals that the type-II bursts can be well detected for the Rapid Burster MXB 1730–335, with an average rate of 2 bursts min− 1 in a manner of the well-known relaxation oscillation.