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Astron. Astrophys. 337, 723-728 (1998)

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An unusual glitch signature in the pulsar PSR B1822-09

T.V. Shabanova

Astro Space Center, P.N. Lebedev Physical Institute, 53 Leninskij Prospect, 117924 Moscow, Russia (tvsh@prao.psn.ru)

Received 17 February 1998 / Accepted 30 June 1998


Two glitches have been detected in the pulsar PSR B1822-09. The first glitch occurred around MJD 49615 and was characterized by a fractional increase in rotational frequency of [FORMULA]. The second glitch occurred 325 days after the first one and caused a fractional change in frequency of [FORMULA]. Of interest was the post-glitch behaviour. The rotational frequency immediately after the second glitch began slowly, gradually increasing which lasted [FORMULA]620 days. As a result of the slow increase a fractional change in rotation frequency for this period of time made up [FORMULA]. This event was accompanied by a decrease in the frequency derivative, which having reached minimum magnitude [FORMULA] less than the original value, returned to its initial value.

Key words: pulsars: general – pulsars: individual: PSR B1822-09 – stars: rotation

Send offprint requests to: T.V. Shabanova

© European Southern Observatory (ESO) 1998

Online publication: August 27, 1998