2001/11/29 by Fotis P. Gavriil, F. P. Gavriil, Victoria M. Kaspi +4
Engineering · Physics and Astronomy · #Astronomy #Astrophysics (astro-ph) #Atomic and Subatomic Physics Research #FOS: Physical sciences #Geology #Physics #Pulsar #Pulsars and Gravitational Waves Research #Superconducting Materials and Applications #Term (time) #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0111562
published in arXiv (Cornell University) 199, 274 (Cornell University) · 4 pages, 9 figures, To appear in "Neutron Stars in Supernova Remnants" (ASP Conference Proceedings), eds P. O. Slane and B. M. Gaensler
arxiv created 2001/11/29 · openalex publication_date 2001/11/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on long-term monitoring of anomalous X-ray pulsars (AXPs) using the Rossi X-ray Timing Explorer. Using phase-coherent timing, we find a wide variety of behaviors among the sources, ranging from high stability (in 1E 2259.1+586 and 4U 0142+61), to instabilities so severe that phase-coherent timing is not possible (in 1E 1048.1-5937). We note a correlation in which timing stability in AXPs decreases with increasing spin-down rate. The timing stability of soft gamma repeaters in quiescence is consistent with this trend, which is similar to one seen in radio pulsars. We consider high signal-to-noise ratio average pulse profiles as a function of energy for each AXP, and find a variety of behaviors. We find no large variability in pulse morphology nor in pulsed flux as a function of time.