2000A&A...354..960S

An analysis of four glitches observed in the pulsar B1822-09 during the period 1994-1999 is presented. The main distinguishing feature of these glitches is that the sudden increase in rotational frequency is accompanied by a decrease in the frequency derivative. The largest change of the frequency derivative was measured in the fourth glitch. This glitch occurred around MJD 51054 and was characterized by rather a small increase in rotational frequency of Δν/ν=7x10^–9, but a large decrease in the frequency derivative by ∼2.4%. The first two glitches were observed practically simultaneously at two frequencies of 0.1GHz in Pushchino, Russia and 1.6/2.3GHz at HartRAO, South Africa. An analysis of the high- and low frequency timing data showed that glitches did not affect the pulse arrival times at different frequencies within 2ms. Glitch signature was identical in the wide frequency range from 0.1 to 2.3GHz. In addition, a more exact value of the dispersion measure was measured to be 19.383(3)pc/cm³.