论文标题
定期快速无线电爆发FRB 180916.J0158+65的硬X射线排放限制
Limits on the hard X-ray emission from the periodic fast radio burst FRB 180916.J0158+65
论文作者
论文摘要
FRB 180916.J0158+65是最接近的，定期重复的，积极爆裂的快速无线电爆发（FRB），该爆发已定位在螺旋星系的郊区。在这项工作中，我们从尼尔·盖尔斯·斯威夫特（Neil Gehrels Swift）船上的爆发警报望远镜（BAT）中使用Hard X-ray $ 14-195 $ KEV数据研究FRB。 BAT使用编码的蒙版技术，在硬X射线频段中提供了$ \ Lessim 3 $弧线的本地化以及准确的背景估计。自2020年2月以来，BAT一直在调查模式下观察源位置。调查模式观察涉及背景减去光谱，在源位置（从2020年2月至2022年2月）在$ 300-2000 $秒的时间范围内集成。我们分析了BAT的所有$ \ sim 230 $调查模式观测值，并在任何观察值中检查了任何信号。在任何观察值中，我们没有在$>5σ$置信度下检测到任何信号。我们可以估计$ 14-195 $ KEV FLUX的$5σ$上限，其范围在$ 4.5 \ times 10^{ - 10} -10} -7.6 \ times 10^{ - 9} { - 9} \，\ rm erg \，cm^，cm^{ - 2} { - 2} \，s^，s^{ - 1} $。在源距离处，这与$5σ$的亮度上限$ 5.08 \ times 10^{44} - 8.5 \ times 10^{45} \ rm erg \，s^{ - 1} $。通过此估计，我们可以在这些蝙蝠观测的快照的源位置排除任何持续的X射线排放。
FRB 180916.J0158+65 is one of the nearest, periodically repeating, and actively bursting fast radio burst (FRB) which has been localized to the outskirts of a spiral galaxy. In this work we study the FRB with the hard X-ray $14-195$ keV data from the Burst Alert Telescope (BAT) on board The Neil Gehrels Swift Observatory. BAT uses coded mask technology giving a localization of $\lesssim 3$ arc-minute in the hard X-ray band, along with an accurate background estimation. BAT has been observing the source location in survey mode since February 2020. The survey mode observations involves background subtracted spectra, integrated over a time span ranging $300-2000$ seconds, at the source location (from Feb 2020-Jan 2022). We analyzed all the $\sim 230$ survey mode observations from BAT and checked for any signal in any of the observations. We did not detect any signal at $>5σ$ confidence level in any of the observations. We could estimate a $5σ$ upper limit on the $14-195$ keV flux, which ranged between $4.5\times 10^{-10} - 7.6\times 10^{-9}\, \rm erg\, cm^{-2}\, s^{-1}$. At the source distance this relates to a $5σ$ upper limit on luminosity of $5.08\times 10^{44}- 8.5\times 10^{45} \rm erg\, s^{-1}$. With this estimate, we could rule out any persistent X-ray emission, at the source location for these snapshots of BAT observations.
