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Search for intermittent X-ray pulsations from neutron stars in low-mass X-ray binaries
Publications of the Astronomical Society of Australia ( IF 6.3 ) Pub Date : 2021-03-18 , DOI: 10.1017/pasa.2021.6
Yunus Emre Bahar , Manoneeta Chakraborty , Ersin Göğüş

We present the results of our extensive binary orbital motion corrected pulsation search for 13 low-mass X-ray binaries. These selected sources exhibit burst oscillations in X-rays with frequencies ranging from 45 to 1 122 Hz and have a binary orbital period varying from 2.1 to 18.9 h. We first determined episodes that contain weak pulsations around the burst oscillation frequency by searching all archival Rossi X-ray Timing Explorer data of these sources. Then, we applied Doppler corrections to these pulsation episodes to discard the smearing effect of the binary orbital motion and searched for recovered pulsations at the second stage. Here we report 75 pulsation episodes that contain weak but coherent pulsations around the burst oscillation frequency. Furthermore, we report eight new episodes that show relatively strong pulsations in the binary orbital motion corrected data.

中文翻译:

在低质量 X 射线双星中寻找来自中子星的间歇性 X 射线脉动

我们展示了我们对 13 个低质量 X 射线双星进行广泛的双星轨道运动校正脉动搜索的结果。这些选定的源在 X 射线中表现出爆发振荡,频率范围为 45 至 1 122 Hz,二元轨道周期为 2.1 至 18.9 小时。我们首先通过搜索这些源的所有档案罗西 X 射线定时资源管理器数据来确定在爆发振荡频率周围包含微弱脉动的事件。然后,我们对这些脉动事件应用多普勒校正,以消除双星轨道运动的拖尾效应,并在第二阶段搜索恢复的脉动。在这里,我们报告了 75 个脉动事件,其中包含围绕突发振荡频率的微弱但连贯的脉动。此外,
更新日期:2021-03-18
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