Vela pulsar (PSR J0835-4510) glitch observed at the Ooty Radio Telescope (ORT)
ATel #16611; Himanshu Grover (IIT Roorkee, India), M. A. Krishnakumar (NCRA-TIFR, India), Bhal Chandra Joshi (NCRA-TIFR & IIT Roorkee, India), Paramasivan Arumugam (IIT Roorkee, India)
on 3 May 2024; 11:17 UT
Credential Certification: Bhal Chandra Joshi (bcj@ncra.tifr.res.in)
Subjects: Radio, Neutron Star, Pulsar
We monitor several glitching pulsars using two large radio telescopes in India: the Ooty Radio Telescope (ORT) and the upgraded Giant Metrewave Radio Telescope (uGMRT). The Ooty Radio telescope (ORT) observes PSR J0835-4510 at 327 MHz frequency with 16 MHz bandwidth.
We confirm the presence of a recent glitch in PSR J0835-4510, reported by Zubieta et al. (ATel #16608) and confirmed by Campbell-Wilson et al. (ATel #16610). Our preliminary analysis (using two post-glitch epochs MJD 60431.65 and 60432.61) reveals that the fractional spin-up in the rotational frequency, DeltaF0/F0, is 2396(11)E-9, and the glitch epoch is MJD 60430.985 (3). These parameters are likely to be refined after considering the post-glitch recovery in subsequent observations.
The vela pulsar displays recovery of timescales ranging from a few days to a few weeks, and a high-cadence observation would be helpful to understand the glitch mechanism. Monitoring observations with increased cadence for this pulsar are continuing with the ORT and the uGMRT and we encourage other monitoring programs to continue follow-up observations.
We thank the staff of the ORT who made our observations possible. ORT is run by the National Centre for Radio Astrophysics of the Tata Institute of Fundamental Research.
Residual plot for a glitch in PSR J0835-4510
