POLAR measurements of the Crab pulsar
POLAR measurements of the Crab pulsar
复制标题
DOI：
10.22323/1.301.0820
复制
发表时间：
2019-10
期刊：
影响因子：
--
通讯作者：
Po Li;M. Ge;Bobing Wu
中科院分区：
文献类型：
--
作者：
Po Li;M. Ge;Bobing Wu
POLAR是康普顿偏振计敏感的50至500 keV能量范围。蟹状星云脉冲星是中国空间实验室天宫2号（TG-2）极地观测的科学目标。由于其大视场（FoV）， POLAR在大约一半的观测时间内检测到蟹状脉冲星的显著脉冲信号。在这项工作中，我们给出了初步的结果，包括脉冲轮廓，定时和偏振测量方法。首先，我们展示了POLAR观测到的高度显著的脉冲分布，并将其与其他探测器（包括Fermi/LAT和INTEGRAL）的结果进行了比较。并给出了脉冲轮廓随入射角和通道数的函数，表明POLAR具有良好的检测性能。其次，我们发现螃蟹脉冲的定时是精确测量的，这为POLAR定时系统提供了独特的验证和校准。最后，对蟹状脉冲星的潜在极化测量进行了讨论。
POLAR is a Compton polarimeter sensitive in the 50 to 500 keV energy range. The Crab pulsar is a scientific target for POLAR on board the Chinese space laboratory Tiangong-2 (TG-2). With its large Field of View (FoV), POLAR detected significant pulsed signals from the Crab pulsar which is visible by POLAR in about half of observation time. In this work, we present the preliminary results including the pulse profile, timing and polarization measuring method. First, we show the highly significant pulse profile observed by POLAR which is compared to the results of other detectors including Fermi/LAT and INTEGRAL. And the pulse profile as a function of theta incident angle and as a function of channel number, which indicate that POLAR has a good detection performance, have been showed. Second, we find that the timing of the Crab pulses are accurately measured, which provides a unique verification and calibration to the POLAR timing system. Finally, the potential polarization measurement of the Crab pulsar is also discussed.