A Study of Pulse Nulling in PSR J1701 – 3726

Abstract

Using the observation data of Parkes 64 m radio telescope at a central frequency of 1369 MHz, the pulse nulling phenomenon of PSR J1701–3726 was analyzed. It is found that the pulse nulling phenomenon of this pulsar has quasi-periodic, and the quasi-period value approximately is 81.25$P$, where $P$ is the rotation period, and the pulse nulling ratio NF (Nulling Fraction) is calculated to be 27%$\pm$0.97%. Further study on the change of relative energy in the on-pulse region over time shows that there are four different switching modes a, b, c, and d between null state and burst state, among which mode a occurs 23 times, mode b occurs 6 times, mode c occurs 5 times, and mode d occurs 79 times, indicating that there may be some randomness in state transitions.