2002MNRAS.330...58U

Large glitches were recently observed in the spin rates of two pulsars, B1046-58 and B1737-30. The glitches were characterized by fractional increases in rotation rate of 0.77 and 1.44x10^–6 respectively. PSR B1737-30 is the most frequently glitching pulsar and this is the largest glitch so far observed from it. Most of the jump in the spin-down rate accompanying these glitches decayed away on short time-scales of a few days. For PSR B1737-30, there appears to be a cumulative shift in spin-down rate resulting from its frequent glitches. This probably accounts for its braking index of -4±2 suggested by the available data, while a value of 2.1±0.2 is obtained for B1046-58.