paper

Searching radio signals from two magnetars and a high-magnetic field pulsar and the serendipitous discovery of a new radio pulsar PSR J1935+2200

arXiv:2411.15960 · doi:10.1088/1674-4527/ada3b6

Abstract

Magnetars are slowly rotating, highly magnetized young neutron stars that can show transient radio phenomena for radio pulses and fast radio bursts. We conducted radio observations of from two magnetars SGRJ1935+2154 and 3XMMJ185246.6+003317 and a high-magnetic field pulsar PSRJ18460258 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). We performed single pulse and periodicity searches and did not detect radio signals from them. From the piggyback data recorded by other FAST telescope beams when we observed the magnetar SGR1935+2154, we serendipitously discovered a new radio pulsar, PSRJ1935+2200. We carried out the follow-up observations and obtained the timing solution based on these new observations and the archive FAST data. PSRJ1935+2200 is an isolated old pulsar, with a spin period of s, a spin-period derivative of ~s~s, and a characteristic age of Myr. It is a weak pulsar with a flux density of 9.8 Jy at 1.25 GHz. Discovery of a new pulsar from the long FAST observations of 30 minutes implies that there may be more weak older pulsars in the Galactic disk to be discovered.

arXiv comment7 pages, 3 figures and 3 tables. Published in RAA

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