Parkes observations for project P1025 semester 2019OCTS_03

PSRJ2039-5627 is a newly gamma and radio binary pulsar discovered in the Fermi source 3FGL J2039.8-5618. This object has been confirmed as being a redback system, showing an erratic variations in time of the orbital period seen on 10 years of gamma-ray timing, and eclipses of the radio signal seen at 1.4GHz in a previous observation at Parkes with the Multibeam receiver. The emission seen at 1.4GHz is not continuous along the receiver frequency band, but clustered in two ~80MHz bands. This peculiarity has also been seen in a second observation taken three months later. We propose to observe PSRJ2039-5617 with the UWL receiver in order to take data along a much wider frequency band, for studying the mechanisms responsible of the eclipses, its possible variations in time and the peculiar emission seen in the Multibeam observations.

PSR J2039-5627是一颗新近发现的γ射线与射电双星脉冲星，于费米源3FGL J2039.8-5618中被探测到。该天体已被证实为红背系统（redback system），在长达10年的γ射线计时观测中呈现出轨道周期的不规则变化；此前在帕克斯天文台使用多波束接收机（Multibeam receiver）开展的1.4吉赫射电观测中，还探测到了射电信号的掩食现象。1.4吉赫频段的射电辐射并非在接收机全频带上连续分布，而是集中在两个约80兆赫的子频带内，这一特殊辐射特征在三个月后开展的第二次观测中同样被观测到。我们计划使用UWL接收机（UWL receiver）对PSR J2039-5617开展观测，以获取更宽频段的观测数据，用于研究引发射电掩食的物理机制、轨道周期的潜在时变特性，以及多波束观测中发现的特殊辐射现象。