The anti-glitching gamma-ray pulsar PSR J1522-5735
arXiv:2409.19441 · doi:10.1051/0004-6361/202452613
Abstract
Context. A small number of pulsar glitches have been identified as anti-glitches or spin-down glitches, where the overall contribution to the pulsar's rotation frequency is negative. A notable example of a spin-down glitch was observed in PSR 1522-5735, a radio-quiet gamma-ray pulsar discovered by blind searches in the 3-year data from the Fermi Large Area Telescope (LAT). Aims. This work aims to search for PSR 1522-5735's glitches using Fermi-LAT data from over 15 years of observations. Methods. The weighted H-test statistic was applied to identify glitches and evaluate the related changes in pulsar's spin parameters. The timing solution based on these results was further refined by maximization of the unbinned likelihood. The Bayesian information criterion was used to set an appropriate number of parameters in the timing solution to avoid overfitting. Results. The analysis revealed eight glitch events: regular spin-up glitch, spin-up glitch over-recovered to a spin-down and six anti-glitches. These events were radiatively quiet, exhibiting no significant variations in the shape of the pulse profile or energy flux. Conclusions. The results may suggest that an internal mechanism is responsible for spin-down glitch phenomena.
arXiv comment6 pages, 4 figures, journal version
References in corpus (20)
- A study of 315 glitches in the rotation of 102 pulsars
- The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
- An Anti-Glitch in a Magnetar
- Improving Sensitivity to Weak Pulsations with Photon Probability Weighting
- The Einstein@Home Gamma-ray Pulsar Survey. I. Search Methods, Sensitivity and Discovery of New Young Gamma-ray Pulsars
- Einstein@Home discovery of four young gamma-ray pulsars in Fermi LAT data
- Timing Gamma-ray Pulsars with the Fermi Large Area Telescope: Timing Noise and Astrometry
- Anti-glitches in the Ultraluminous Accreting Pulsar NGC 300 ULX-1 Observed with NICER
- Anti-glitch induced by collision of a solid body with the magnetar 1E 2259+586
- A glitch and an anti-glitch in the anomalous X-ray pulsar 1E 1841-045
- Anti-glitch of magnetar 1E 2259+586 in the wind braking scenario
- The variable spin-down rate of the transient magnetar XTE J1810--197
- Event Weighted Tests for Detecting Periodicity in Photon Arrival Times
- A radiatively-quiet glitch and anti-glitch in the magnetar 1E 2259+586
- Swift observations of two outbursts from the magnetar 4U 0142+61
- Anti-glitches within the standard scenario of pulsar glitches
- Discovery of the first anti-glitch event in the rotation-powered pulsar PSR B0540-69
- A simple mechanism for the anti-glitch observed in magnetar 1E 2259+586
- Antiglitch Inconsistent With Magnetar Model of AXP
- Variable Absorption Line in XTE J1810-197