Confirmation of glitch event observed in PSR J1740-3015
ATel #15839; L. Dunn (University of Melbourne, "UMelb"), C. Flynn (Swinburne University of Technology, "SUT"), M. Bailes (SUT), T. Bateman (SUT), D. Campbell-Wilson (Woodchester Observatory), A. Deller (SUT), A. J. Green (University of Sydney), V. Gupta (SUT), A. Jameson (SUT), Y. S. C. Lee (UMelb), A. Mandlik (SUT), A. Melatos (UMelb), G. Urquhart (SUT)
on 2 Jan 2023; 05:58 UT
Credential Certification: Liam Dunn (liamd@student.unimelb.edu.au)
Referred to by ATel #: 15851
At Molonglo Observatory Synthesis Radio Telescope (MOST) near Canberra, Australia, we carry out a pulsar timing programme in which we observe a large number of pulsars with near-daily cadence, as part of the UTMOST project (Bailes et al. 2017). Observations are at a central frequency of 831 MHz and with a bandwidth of 45 MHz.
We confirm the detection of a glitch in PSR J1740-3015, recently reported by Zubieta et al. (ATel #15838). Our first post-glitch observation was taken at MJD 59945.0 (2023-01-01 UTC). The automated glitch detection pipeline in place at UTMOST, based on the algorithm of Melatos et al. 2020, confidently detected the glitch with a natural log Bayes factor of 79. Our preliminary analysis shows a change in its rotation frequency by delta F0/F0 = 3.1(2)E-7, consistent with ATel #15838. Although our observations are not dense enough to accurately constrain the glitch epoch, our data are consistent with a glitch epoch of approximately MJD 59935.1 as reported previously.
We will continue to monitor the pulsar and we encourage other observers to help resolve the pulsar's glitch recovery.
References:
Bailes, M, et al., 2017, PASA, 34 e045.
https://astronomy.swin.edu.au/research/utmost/
Melatos, A, et al., 2020, The Astrophysical Journal, 896, 78
