论文标题
Chime/FRB全阵列基带数据的分析管道
An analysis pipeline for CHIME/FRB full-array baseband data
论文作者
论文摘要
加拿大氢强度映射实验（Chime）已成为通过Chime/FRB后端检测快速无线电爆发（FRB）的领先设施。 Chime/FRB在具有24 kHz光谱和1毫秒时间分辨率的极化强度数据流中搜索快速瞬变。强度梁指向天空中的预定位置。一个触发的基带系统记录了FRB检测时的钟阵列中每个天线测量的相干电场。在这里，我们描述了为处理这些全阵列基带数据记录而开发的分析技术和自动化管道。尽管实时FRB检测管道的定位极限为几个弧形，但基带数据的离线分析产生了具有亚微米精度的源定位，其特征是使用脉冲星样品和一个重复的FRB具有已知位置。基带管道还可以在微秒范围内解决时间间结构，并研究极化的研究，包括检测法拉第旋转。
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) has become a leading facility for detecting fast radio bursts (FRBs) through the CHIME/FRB backend. CHIME/FRB searches for fast transients in polarization-summed intensity data streams that have 24-kHz spectral and 1-ms temporal resolution. The intensity beams are pointed to pre-determined locations in the sky. A triggered baseband system records the coherent electric field measured by each antenna in the CHIME array at the time of FRB detections. Here we describe the analysis techniques and automated pipeline developed to process these full-array baseband data recordings. Whereas the real-time FRB detection pipeline has a localization limit of several arcminutes, offline analysis of baseband data yields source localizations with sub-arcminute precision, as characterized by using a sample of pulsars and one repeating FRB with known positions. The baseband pipeline also enables resolving temporal substructure on a micro-second scale and the study of polarization including detections of Faraday rotation.
