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arXiv 2108.03404astro-ph.HE
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与第一个银河系FRB和H.E.S.S有关的SGR1935 +2154爆发活动的观测

Observation of burst activity from SGR1935+2154 associated to first galactic FRB with H.E.S.S

D. Kostunin, H. Ashkar, F. Schüssler, G. Rowell

摘要:

快速射电暴(FRB)是一种持续时间为几毫秒、亮度温度高、具有相干发射机制的射电脉冲。目前,在高频无线电波段已经探测到一些河外FRB,包括重复的FRB。对这些现象最合理的解释是磁星超耀斑。这种情况的第一个观测证据是在2020年4月获得的,当时从银河磁星和软伽马中继器SGR 1935 +2154的方向检测到了FRB。在FRB之前,Swift-BAT卫星观测到了一些软伽马射线暴,这触发了H.E.S.S.的后续计划。成像大气切伦科夫望远镜(IACT)。H.E.S.S.在STARE 2和CHIME检测FRB之前几小时,在2小时窗口内观察到SGR 1935 +2154。这些观测与INTEGRAL和Swift-BAT探测到的磁星的其他X射线爆发重叠,从而提供了在甚高能量域中处于耀斑状态的磁星的第一次观测。本文对这些观测结果进行了分析,讨论了高分辨卫星的观测结果和前景。软伽马中继器和异常X射线探测器的后续计划。

英文摘要:

Fast radio bursts (FRB) are enigmatic powerful single radio pulses with durations of several milliseconds and high brightness temperatures suggesting coherent emission mechanism. For the time being a number of extragalactic FRBs have been detected in the high-frequency radio band including repeating ones. The most plausible explanation for these phenomena is magnetar hyperflares. The first observational evidence of this scenario was obtained in April 2020 when an FRB was detected from the direction of the Galactic magnetar and soft gamma repeater SGR1935+2154. The FRB was preceded with a number of soft gamma-ray bursts observed by Swift-BAT satellite, which triggered the follow-up program of the H.E.S.S. imaging atmospheric Cherenkov telescopes (IACTs). H.E.S.S. has observed SGR1935+2154 over a 2 hour window few hours prior to the FRB detection by STARE2 and CHIME. The observations overlapped with other X-ray bursts from the magnetar detected by INTEGRAL and Swift-BAT, thus providing first observations of a magnetar in a flaring state in the very-high energy domain. We present the analysis of these observations, discuss the obtained results and prospects of the H.E.S.S. follow-up program for soft gamma repeaters and anomalous X-ray pulsars.

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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