Glitch Properties of Two Magnetars: 1RXS J170849.0-400910 & 1E 1841-045
Abstract
We investigated the long-term spin properties of two magnetars: 1RXS J170849.0-400910 and 1E 1841-045, using RXTE observations spanning more than 6 and 5 years, respectively. Our extensive search for glitches in 1RXS J170849.0-400910 resulted in no unambiguous glitches, though we identified two glitch candidates (with Deltanu/nu ∼ 10(-6) ) in two data gaps: a strong candidate around MJD 55532 and another one around MJD 54819, which is slightly less robust. In the temporal evolution of 1E 1841-045 we identified two peculiar timing anomalies within ∼1 year of each other: A glitch with Deltanu/nu ∼ 10(-6) near MJD 54303 which is the fourth glitch observed from this source in 13 years of RXTE monitoring and an anti-glitch with Deltanu/nu ∼ 10(-7) near MJD 54656. This is the second anti-glitch that is observed from a pulsar. The amplitude of this event is comparable with the amplitude of the anti-glitch that was recently observed from magnetar 1E 2259+586. We discuss our results in the context of rotation powered pulsar glitch mechanisms for the glitches, and plausible magnetospheric scenarios for the anti-glitch.
- Publication:
-
40th COSPAR Scientific Assembly
- Pub Date:
- 2014
- Bibcode:
- 2014cosp...40E2888S