来自蟹状星云脉冲星的巨脉冲：宽带研究
Giant pulses from the Crab pulsar: A wide-band study
摘要：
蟹状星云脉冲星以其异常的巨射电脉冲辐射而闻名。过去的研究只集中在非常明亮的脉冲或不敏感的巨脉冲光度分布的暗端。我们的新仪器提供了一个大的带宽和高的时间分辨率相结合的窄射电波束的Westerbork综合射电望远镜（WSRT），我们寻求探测弱巨脉冲发射制度。WSRT以相控阵模式使用，可以分辨蟹状星云的很大一部分。由此产生的脉冲星信号使用PuMa II脉冲星后端记录，然后相干去色散并搜索巨脉冲发射。经过仔细的流量校准，数据进行了分析，以研究巨脉冲的性质。分析包括测量的脉冲宽度，强度，能量和散射时间的分布。弱巨脉冲被证明是强度分布的一个单独的部分。利用探测到的大量巨脉冲，分析了巨脉冲中的散射和闪烁现象。我们报告的第一次检测巨脉冲发射在一个单一的旋转周期内的主脉冲和脉冲间的阶段。检测率与在任一脉冲相位处的脉冲的出现一致，因为它们是独立的。这些脉冲对用于检查单个脉冲周期内的闪烁时标。
英文摘要：
The Crab pulsar is well-known for its anomalous giant radio pulse emission. Past studies have concentrated only on the very bright pulses or were insensitive to the faint end of the giant pulse luminosity distribution. With our new instrumentation offering a large bandwidth and high time resolution combined with the narrow radio beam of the Westerbork Synthesis Radio Telescope (WSRT), we seek to probe the weak giant pulse emission regime. The WSRT was used in a phased array mode, resolving a large fraction of the Crab nebula. The resulting pulsar signal was recorded using the PuMa II pulsar backend and then coherently dedispersed and searched for giant pulse emission. After careful flux calibration, the data were analysed to study the giant pulse properties. The analysis includes the distributions of the measured pulse widths, intensities, energies, and scattering times. The weak giant pulses are shown to form a separate part of the intensity distribution. The large number of giant pulses detected were used to analyse scattering and scintillation in giant pulses. We report for the first time the detection of giant pulse emission at both the main- and interpulse phases within a single rotation period. The rate of detection is consistent with the appearance of pulses at either pulse phase as being independent. These pulse pairs were used to examine the scintillation timescales within a single pulse period.
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。
