Parkes observations for project P885 semester 2022APRS_01

We request a continued reduced monitoring cadence for the magnetars 1E 1547.0-5408 and Swift J1818.0-1607 at once every 10 days, to track their rotation, flux density, and polarisation. Swift J1818.0-1607 remains very dynamic, and the unique UWL capabilities promise new opportunities to probe still mysterious radio emission mechanisms in magnetars. Our timing results indicate that 1E 1547.0-5408 is currently a more stable rotator, supporting the diminished cadence. We will observe XTE J1810-197 and PSR J1622-4950 less frequently, to complement monitoring elsewhere. The overall request is 18 hours.

我们请求维持对磁星1E 1547.0-5408与Swift J1818.0-1607每10天一次的降级监测频次，以追踪其自转状态、流量密度与偏振特性。Swift J1818.0-1607目前活动极为活跃，其独特的UWL观测能力为探究磁星中迄今尚未阐明的射电辐射机制提供了全新机遇。我们的计时观测结果显示，1E 1547.0-5408当前是一颗自转更为稳定的天体，这为下调其监测频次提供了有力支撑。我们将降低对XTE J1818-197与脉冲星PSR J1622-4950的观测频次，以此对其他区域的监测工作予以补充。本次申请的总观测时长为18小时。