Confirmation of a glitch in PSR J1740-3015 using the upgraded Giant Metrewave Radio Telescope (uGMRT)
ATel #17489; Himanshu Grover (IIT Roorkee, India), Bhal Chandra Joshi (NCRA-TIFR & IIT Roorkee, India), M. A. Krishnakumar (NCRA-TIFR, India), P. Arumugam (IIT Roorkee, India)
on 11 Nov 2025; 08:12 UT
Credential Certification: Bhal Chandra Joshi (bcj@ncra.tifr.res.in)
Subjects: Radio, Neutron Star, Star, Transient, Pulsar
We confirm the presence of a new glitch in pulsar J1740-3015/B1737-30, recently reported by Shaw et al. (ATel #17486). Our preliminary analysis, based on a single post-glitch epoch around MJD 60987.39, yields a fractional spin-up in the rotational frequency, ΔF0/F0, of 2.6(1)E-6. The initial estimate of the glitch epoch is consistent with Shaw et al. (ATel #17486), at MJD 60980(5). A more precise epoch will become available with additional post-glitch observations.
We will continue to monitor this pulsar, as further follow-up observations are important for refining the post-glitch timing solution, studying the glitch recovery, and investigating any associated radiative changes. We encourage other monitoring programs to continue their observations as well.
We thank the staff of the GMRT who made our observations possible. The uGMRT is operated by the National Centre for Radio Astrophysics of the Tata Institute of Fundamental Research.
