Xu et al. report the discovery and timing results of 15 pulsars detected in a high Galactic latitude survey conducted using the Five-hundred-meter Aperture Spherical Telescope (FAST). The survey targeted on a region as close as possible to the Galactic Center, encompassing an area near the Galactic Bulge. The 15 newly discovered pulsars include eleven normal pulsars and four millisecond pulsars (MSPs). Among the MSPs, three are found to be in binary systems, with orbital periods of approximately 3.1, 4.6, and 12.5 days, respectively. Coherent timing solutions were successfully obtained for three of the normal pulsars: PSRs J1745-0059, J1746-0156, and J1800-0059. In addition, the data revealed that four pulsars (three newly discovered and one previously known), exhibit mode-changing and/or subpulse drifting phenomena. By comparing these discoveries with population simulations of the Galactic disk and Bulge MSP populations, the authors suggest that the new pulsars are most likely located in the disk. Nonetheless, the results highlight the significant potential of deep surveys at high Galactic latitudes to improve our understanding of the MSP population in the direction of the Bulge.

The image above displays the survey’s sky coverage in Galactic coordinates. Black dots show individual beam positions, blue dots indicate known pulsars within the region, and red stars highlight the newly discovered ones. The area outlined by the solid black line marks the region targeted for future observations.