Glitch event observed in the pulsar PSR J1740-3015

ATel #8298; Fabian Jankowski (Swinburne University of Technology), Matthew Bailes (Swinburne University of Technology), Ewan Barr (Swinburne University of Technology), Timothy Bateman (CSIRO), Shivani Bhandari (Swinburne University of Technology), Frank Briggs (ANU), Manisha Caleb (ANU), Duncan Campbell-Wilson (University of Sydney), Chris Flynn (Swinburne University of Technology), Anne Green (University of Sydney), Richard Hunstead (University of Sydney), Andrew Jameson (Swinburne University of Technology), Evan Keane (SKA Organisation), Vivek Venkatraman Krishnan (Swinburne University of Technology), Willem van Straten (Swinburne University of Technology)
on 19 Nov 2015; 00:01 UT
Credential Certification: Fabian Jankowski (fjankowski@swin.edu.au)

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At the recently refurbished 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 up to daily cadence.

We detected a glitch event in the recent timing data of the pulsar J1740-3015. Our preliminary analysis shows a change in its rotation frequency on MJD 57296.5 +- 0.9 (2015-10-01 UTC) by |delta F0/F0| = (1.30 +- 0.04) E-9.
From our current data we can estimate an upper limit on the jump in spin-down rate of |delta F1/F1| <= 2.6E-4 (1-sigma) or 6.6E-4 (3-sigma).

This link shows a plot of the best least-squares fit of our glitch model to our data: best fit of glitch model to post-fit residuals.

We will continue to monitor the pulsar and we encourage other observers to help resolve the pulsar's glitch recovery.