Observations of fourteen pulsar glitches
Abstract
About 76 glitches in 25 pulsars have been reported to date. Most glitches are `giant', with fractional increases of frequency dnu0/nu0 ~ 10-6. 25 glitches were analysed and presented by Shemar & Lyne (1996) who detected them mainly at Jodrell Bank during the monitoring of a sample of 279 pulsars in a regular timing programme up to MJD 49500. This paper is a continuation of their work up to MJD 50500. We present the detection and analysis of a further 14 glitches in 9 pulsars, 6 of which have glitched for the first time since monitoring had started. Eleven of these glitches are small (dnu0/nu0 ~ 10-9) and below the completeness threshold of Shemar and Lyne(1996). We report a giant glitch in PSR B1930+22, the second largest reported hitherto, with a dnu0/nu0 = 4.5 x 10-6. We also report four recent glitches in PSR B1737-30 which continues to exhibit frequent glitches. Few of these pulsars show any recovery after the glitch.
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