2011/05/09 by Burçin İçdem, Burcin Icdem, Altan Baykal +6
Engineering · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Pulsars and Gravitational Waves Research #Superconducting Materials and Applications #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1105.1630
13 pages, 1 figure, accepted to be published in MNRAS
openalex publication_date 2011/05/09 · arxiv created 2011/10/06 · arxiv updated 2011/10/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the pulse timing analysis of Rossi X-ray Timing Explorer (RXTE) observations of the anomalous X-ray pulsar 1E 2259+586 from its 2002 outburst to October, 2010. Our objectives are to extend the work on the recovery stage after the 2002 glitch, investigate the variations caused by the second glitch which occurred in 2007 and look for other unusual events, if any, that arise in the regular spin-down trend of the source. The recovery of the 2002 glitch gives good fit when the two-exponential glitch model of the Crab pulsar is used, rather than the standard glitch model, in the 1360-day interval after the first glitch. The sampling of the following 260-day is not frequent enough to be phase-connected. After that interval, our timing analysis yields that there is a fractional frequency change of \fracΔνν∼8.20(2)×10-7. Moreover, we report two frequency shifts of fractional changes, \fracΔνν∼3×10-8,-1×10-8: The first one at MJD ∼53750 had a positive fractional frequency change in contrast to the second one at MJD ∼54880 for which the pulse frequency decreased. These frequency shifts both resemble the microglitches observed in radio pulsars.