Profile shifting and irregular subpulse drifting in PSR J0344-0901 discovered by FAST
Tedila, Habtamu Menberu
We report on two single-pulse events in PSR J0344-0901 observed at frequency centered at 1.25 GHz using the Five-hundred meter Aperture Spherical radio Telescope (FAST). The first event demonstrates as shifting in the integrated profile during which the emission longitude gradually increases by about their profile width, reaches a maximum, and then gradually returns to the usual longitude. The event lasts for around 100 pulse periods and the shift in the peak of the two profiles is about 1^\circ. Study of the change in the position angles shows that an increase occurs at around the profile peak when the event takes place. The second event exhibits as variation in the drifting subpulses. We identified four emission modes each with different subpulse drift characteristics.