Unveiling the emission properties of three long-period pulsars using FAST

Most pulsars typically display one or two common emission phenomena, such as nulling or mode changing, and it is relatively rare for a single pulsar to exhibit multiple phenomena. This is especially true for long-period pulsars, which are less frequently studied and tend to show more complex and varied emission behaviors. In this paper, we investigate the emission properties of three long-period pulsars (PSR J1945+1211, PSR J2323+1214, and PSR J1900−0134) observed with the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) during the CRAFTS survey at a center frequency of 1.25 GHz.

Key findings include the detection of quasi-periodic nulls and the first identification of dwarf pulses in PSR J2323+1214, characterized by weaker and narrower emissions compared to regular bursts. Additionally, a detailed microstructure analysis of PSR J1900−0134 revealed pulse patterns as short as 1.57 microseconds. Bright pulses were observed in all three pulsars at different rates.