论文标题
Parkes 70 cm Pulsar调查档案中发现了四个新的快速无线电爆发
Four New Fast Radio Bursts Discovered in the Parkes 70-cm Pulsar Survey Archive
论文作者
论文摘要
我们介绍了在搜索Parkes 70 cm Pulsar调查数据档案中发现的四个新的快速无线电爆发，以备分散的单脉冲和爆发。我们搜索了带有Heimdall和Fetch检测和分类算法在0到5000 pc cm $^{ - 3} $之间的分散度量（DMS）。发现的所有四个FRB的宽度（$> 50 $ MS）明显大于迄今已检测到的所有FRB。大脉冲宽度不受星际散射或通道内色散涂抹的主导。其中一个FRB的DM为3338 PC CM $^{3} $，这是迄今为止所有FRB的最大值。这些也是迄今为止任何射电望远镜检测到的第一个FRB，早于Lorimer爆发了将近十年。我们的结果表明，Pulsar调查档案仍然是先前未发现的FRB的重要来源，并且在$ \ sim 100 $ 100 $ MS的时间尺度上搜索FRB可能会显示出较大的宽脉冲FRB的存在。
We present four new fast radio bursts discovered in a search of the Parkes 70-cm pulsar survey data archive for dispersed single pulses and bursts. We searched dispersion measures (DMs) ranging between 0 to 5000 pc cm$^{-3}$ with the HEIMDALL and FETCH detection and classification algorithms. All four of the FRBs discovered have significantly larger widths ($> 50$ ms) than almost all of the FRBs detected and cataloged to date. The large pulse widths are not dominated by interstellar scattering or dispersive smearing within channels. One of the FRBs has a DM of 3338 pc cm$^{3}$, the largest measured for any FRB to date. These are also the first FRBs detected by any radio telescope so far, predating the Lorimer Burst by almost a decade. Our results suggest that pulsar survey archives remain important sources of previously undetected FRBs and that searches for FRBs on time scales extending beyond $\sim 100$ ms may reveal the presence of a larger population of wide-pulse FRBs.
