Parkes observations for project P1105 semester 2021APRS_21

We have re-processed all the observations in the Parkes pulsar data archive obtained during the first four years of the Parkes multibeam receiver and have developed a new artificial intelligence (AI) algorithm to investigate huge volume of candidates. Except for our previous detections, the latest results include 87 new fast radio burst (FRB) candidates with S/N above 7. These signals were only detected in a single beam of the receiver suggesting that they are unlikely to be terrestrial. Their dispersion measure (DM) excesses over the estimated Galactic DM place them at extragalactic distances. Using the Ultra Wideband Low (UWL) receiver we have opportunity to detect repeating signals from some of these FRB candidates. As all these signals were detected in the 20 cm band, the UWL provides the opportunity to observe stronger emission in other observing bands.

我们对帕克斯多波束接收机运行首四年期间获取的帕克斯脉冲星数据档案中的全部观测数据进行了重新处理，并开发了一款全新的人工智能（Artificial Intelligence, AI）算法，用于分析海量候选信号。相较于我们此前的探测成果，本次最新研究共发现87个新的快速射电暴（Fast Radio Burst, FRB）候选体，其信噪比（Signal-to-Noise Ratio, S/N）均高于7。这些信号仅在接收机的单个波束中被探测到，表明它们不太可能为地面人为干扰信号。相较于估算的银河色散量（Dispersion Measure, DM），这些候选体的色散量存在超额，据此可推断它们处于河外距离范围。借助超宽带低（Ultra Wideband Low, UWL）接收机，我们有望探测到其中部分快速射电暴候选体的重复爆发信号。由于所有上述信号均在20厘米波段被探测到，超宽带低接收机可让我们在其他观测波段中观测到更强的射电辐射。