论文标题
FRB 121102的同时多尾镜观测
Simultaneous multi-telescope observations of FRB 121102
论文作者
论文摘要
我们在2019年9月10日的“主动”期间进行了11次探测FRB 121102在〜3小时的观察结果中。使用新部署的Meertrap系统和单个脉冲检测管道进行了检测。幸运的是，这一天的Nancay射电望远镜观察与Meerkat观察的最后一个小时重叠，并同时进行了4个同时检测。 Meerkat的宽带接收器的观察延伸到相对较低的频率（900-1670 MHz可用的L波段范围），使我们能够详细介绍复杂的频率结构，强度变化和频率依赖性的子质量脉冲漂移。我们测量的全带和子带数据的漂移速率与600-6500 MHz之间发布的漂移率一致，斜率为-0.147 +/- 0.014 ms^-1。其中两个检测到的爆发表现出与更明亮的主脉冲分离约28毫秒和〜34 ms的淡淡的“前体”。 2019年10月6日至8日，进行了一项后续的多守门员运动，以更好地了解这些频率漂移和结构，从而进行了广泛而连续的乐队。未产生检测，表明在此期间，源在广泛的频率范围内是“无活跃的”。
We present 11 detections of FRB 121102 in ~3 hours of observations during its 'active' period on the 10th of September 2019. The detections were made using the newly deployed MeerTRAP system and single pulse detection pipeline at the MeerKAT radio telescope in South Africa. Fortuitously, the Nancay radio telescope observations on this day overlapped with the last hour of MeerKAT observations and resulted in 4 simultaneous detections. The observations with MeerKAT's wide band receiver, which extends down to relatively low frequencies (900-1670 MHz usable L-band range), have allowed us to get a detailed look at the complex frequency structure, intensity variations and frequency-dependent sub-pulse drifting. The drift rates we measure for the full-band and sub-banded data are consistent with those published between 600-6500 MHz with a slope of -0.147 +/- 0.014 ms^-1. Two of the detected bursts exhibit fainter 'precursors' separated from the brighter main pulse by ~28 ms and ~34 ms. A follow-up multi-telescope campaign on the 6th and 8th October 2019 to better understand these frequency drifts and structures over a wide and continuous band was undertaken. No detections resulted, indicating that the source was 'inactive' over a broad frequency range during this time.
