A very large glitch in the radio pulsar PSR B0740-28

Benjamin Shaw, Mitchell Mickaliger, Benjamin Stappers, Patrick Weltevrede, Andrew Lyne, Michael Keith, Avishek Basu

Research output: Contribution to journalLetter


We have detected a large glitch event in the timing data of the radio pulsar PSR B0740-28 (J0742-2822), which we monitor routinely as part of the pulsar timing programme at the Jodrell Bank Observatory. PSR B0740-28 has a spin-frequency of 6 Hz and a characteristic (spin-down) age of 160 kyr. We monitor PSR B0740-28 for 1 hour per day with the 42-ft telescope and approximately weekly with the Lovell telescope. The glitch occurred on Saturday the 17th of September 2022, and our preliminary analysis indicates a fractional rotational spin-up of dF0/F0 = (4304.2+/-1.0)E-9 (1 sigma), which makes it the largest of the 9 glitches reported in this pulsar. There is no current indication of a significant change in the spin-down rate. We currently constrain the glitch epoch to be MJD 59839.4+/-0.5. Follow-up observations of this pulsar are encouraged to help refine the glitch characteristics and to identify any radiative effects seen at other wavelengths.
Original languageEnglish
Article number15622
JournalThe Astronomer's Telegram
Publication statusPublished - 21 Sept 2022


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