Glitch event in the Vela pulsar (PSR J0835-4510) observed at HawkRAO
ATel #14808; Steve Olney (Hawkesbury Radio Astronomy Observatory)
on 26 Jul 2021; 08:08 UT
Credential Certification: Chris Flynn (cflynn@swin.edu.au)
Referred to by ATel #: 14812
Hawkesbury Radio Astronomy observatory (HawkRAO) is an amateur facility
near Sydney, Australia carrying out observations of the Vela pulsar with
daily cadence extending over more than 4 years. Observations are at a
central frequency of 436 MHz and with a bandwidth of 2.4 MHz. The
antenna is a fixed transit mode array of four 42-element Yagis.
We confirm the detection of a glitch in PSR J0835-4510, recently
reported by Sosa-Fiscella et al. (ATel #14806) and Dunn et al. (ATel
#14807). Our last pre-glitch observation ended at MJD 59417.126
(2021-07-22 UTC) and our first post-glitch observation started at MJD
59418.081 (2021-07-23 UTC). These epochs are consistent with
observation times given in ATels #14806 and #14807 and the glitch
epoch given in ATel #14807 of MJD 59417.628. Our preliminary analysis
shows a change in its rotation frequency by delta P0/P0 = (1.25 +/-
0.1) E-6. Two following observations (2021-07-24 UTC and 2021-07-25
UTC) returned a delta P0/P0 = (1.25 +/- 0.1) E-6 and delta P0/P0 =
(1.30 +/- 0.1) E-6 respectively.
We will continue to monitor the pulsar to refine our estimate of the
glitch magnitude.
