Parkes observations for project P885 semester 2021OCTS_12

We request a reduced monitoring cadence for the magnetars 1E 1547.0-5408 and Swift J1818.0-1607 to 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.

我们请求将磁星（magnetar）1E 1547.0-5408和Swift J1818.0-1607的监测频率（cadence）降低至每10天一次，以追踪其旋转状态（rotation）、通量密度（flux density）及偏振特性（polarisation）。Swift J1818.0-1607的活动仍十分活跃，而UWL的独特能力有望为探索磁星中仍存神秘的射电辐射机制（radio emission mechanism）提供新机遇。我们的计时结果表明，1E 1547.0-5408目前是更为稳定的旋转体（rotator），这为降低监测频率提供了依据。我们将降低对XTE J1810-197和PSR J1622-4950的观测频率，以补充其他观测项目的监测工作。本次申请的总观测时长为18小时。