Parkes observations for project P602 semester 2015APRS_01

We propose primarily to continue studying 1E 1547.0-5408, one of the
three magnetars known to currently emit radio pulsations. The aim is to
develop a more specific understanding of the dynamical behavior of their
magnetospheres and ultra-strong magnetic fields, which are responsible
for X-ray and gamma-ray outbursts, magnetospheric currents and particle
acceleration, and heating of the neutron star surface. 1E 1547.0-5408
has been remarkably active over the past 4.5 years: following a large
X-ray outburst in October 2008, radio emission ceased, recommencing
sporadically in December. In January 2009, a much larger X-ray outburst
occurred, and since then there have been huge variations in its radio
flux. The X-ray flux is gradually decaying, and meanwhile the torque
on the star continues to vary enormously. At Parkes we request weekly
timing to track its rotation and radio flux, while we monitor its X-ray
flux with the Swift satellite. For little additional time we will also
obtain useful data on two other pulsars of interest: one other
magnetar known to be currently radio active, and a pulsar that "blinks"
on ~year timescales, the second known in its class.

本研究计划主要延续对1E 1547.0-5408的观测研究——该源是目前已知的三颗能够产生射电脉冲辐射的磁星（magnetar）之一。本研究旨在更精准地阐明其磁层与超强磁场的动力学行为，而这类磁场正是引发X射线与伽马射线暴、磁层电流与粒子加速，以及中子星（neutron star）表面加热现象的核心成因。
1E 1547.0-5408在过去4.5年间表现出极强的活动性：2008年10月爆发一次大规模X射线暴后，其射电辐射一度中断，后于同年12月间歇性恢复。2009年1月，该源又发生了一次规模更大的X射线暴；自此之后，其射电流量出现剧烈波动。
目前其X射线流量正逐渐衰减，与此同时，该中子星的自转扭矩也持续发生大幅变化。
我们申请在帕克斯（Parkes）望远镜开展每周一次的计时观测，以追踪其自转状态与射电流量变化；同时借助Swift卫星对其X射线流量进行监测。
仅需额外少量观测时长，我们还将获取另外两颗值得关注的脉冲星的有效观测数据：其一为目前已知的另一颗具备射电辐射活性的磁星，其二是一类在约年际尺度上发生“闪烁”的脉冲星，为该类别中第二例被发现的源。