标题： 快速ASKAP连续波巡天探测到的脉冲星特征分析 显示英文标题

标题： Characterizing Pulsars Detected in the Rapid ASKAP Continuum Survey

摘要： 我们报告了在澳大利亚平方公里阵列探路者（ASKAP）望远镜以888 MHz观测到的661个已知脉冲星的探测结果，这是快速ASKAP连续波巡天（RACS）的一部分。 通过天文学上的巧合实现了这些探测，并且我们估计样本的误报率为约0.5%。 利用400 MHz和1400 MHz的存档数据，我们估算了样本中脉冲星的幂律谱指数，并发现平均谱指数为-1.78±0.6。 然而，我们也发现单一的幂律不足以模拟所有观测到的谱。 通过加入来自各种成像巡天的150 MHz到3 GHz之间的流量密度，我们发现多达40%的样本显示出偏离简单幂律模型的情况。 使用RACS数据中的Stokes V测量值，我们测量了样本中9%的圆偏振分数，并发现平均偏振分数约为10%（检测值与上限之间一致）。 利用由色散度（DM）推导的距离，我们估算脉冲星的伪亮度，并未发现与脉冲星固有属性之间存在强相关性的证据。 显示英文摘要

摘要： We present the detection of 661 known pulsars observed with the Australian SKA Pathfinder (ASKAP) telescope at 888 MHz as a part of the Rapid ASKAP Continuum Survey (RACS). Detections were made through astrometric coincidence and we estimate the false alarm rate of our sample to be ~0.5%. Using archival data at 400 and 1400 MHz, we estimate the power law spectral indices for the pulsars in our sample and find that the mean spectral index is -1.78 +/- 0.6. However, we also find that a single power law is inadequate to model all the observed spectra. With the addition of the flux densities between 150 MHz and 3 GHz from various imaging surveys, we find that up to 40% of our sample shows deviations from a simple power law model. Using Stokes V measurements from the RACS data, we measured the circular polarization fraction for 9% of our sample and find that the mean polarization fraction is ~10% (consistent between detections and upper limits). Using the dispersion measure (DM) derived distance we estimate the pseudo luminosity of the pulsars and do not find any strong evidence for a correlation with the pulsars' intrinsic properties.