快速射电暴和技术签名的高时间分辨率全天空监视器

M. Sokołowski, D. Price, R. Wayth
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引用次数: 0

摘要

尽管在400兆赫以上的频率上有数百次快速射电暴(FRB)探测,但在较低的频率上只观察到少数快速射电暴,因此频率低于350兆赫的FRB速率仍然高度不确定。本文描述了我们为增加工程开发阵列2 (EDA2)的观测带宽(至~ 40 MHz)和成像时间分辨率(至~ 10 ms)所做的努力,EDA2是低频平方公里阵列(SKA-Low)的原型站,这将使其对短的、类似frb的无线电脉冲的灵敏度提高两个数量级,并将其转换为高时间分辨率的全天监测frb和来自地外智能的信号(技术特征)。基于这些频率高度不确定的FRB率和SKA-Low站的灵敏度,我们预计每年可以探测到多达数百个FRB,并在这个相对未开发的参数空间中牢固地建立FRB率。
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A High Time Resolution All-Sky Monitor for Fast Radio Bursts and Technosignatures
Despite hundreds of Fast Radio Burst (FRB) detections at frequencies above 400 MHz, only a handful of FRBs have been observed at lower frequencies, hence the FRB rates at frequencies below 350 MHz remain highly uncertain. This paper describes our efforts to increase the observing bandwidth (to ∼40 MHz) and imaging time resolution (to ∼10 ms) of the Engineering Development Array 2 (EDA2), a prototype station of the low-frequency Square Kilometre Array (SKA-Low), which will increase its sensitivity to short, FRB-like, radio pulses by two orders of magnitude and convert it into a high-time resolution all-sky monitor for FRBs and signals from extraterrestrial intelligence (techno-signatures). Based on highly uncertain FRB rates at these frequencies and sensitivity of SKA-Low stations, we expect to detect up to hundreds of FRBs per year and firmly establish the FRB rates in this relatively under-explored parameter space.
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