15 Years Going Steady - Timing the Magnetar 1E 1841-045
Abstract
We report on long-term monitoring of 1E 1841-045, the 12 s anomalous X-ray pulsar (AXP) and magnetar candidate at the center of the supernova remnant Kes 73. We have obtained approximately monthly observations of the pulsar with the Rossi X-ray Timing Explorer (XTE) spanning over two years, during which time 1E 1841-045 is found to be rotating with sufficient stability to derive a phase-connected timing solution. A linear ephemeris is consistent with observations of the pulse period made over the last 15 yrs with the Ginga, ASCA, XTE, &SAX observatories. Phase residuals suggest the presence of ``timing noise'', as is typically observed from young radio pulsars. These results confirm a rapid, constant spin-down for the pulsar, which continues to maintain a steady flux; this is inconsistent with most accretion scenarios.
- Publication:
-
Neutron Stars in Supernova Remnants
- Pub Date:
- 2002
- DOI:
- 10.48550/arXiv.astro-ph/0112019
- arXiv:
- arXiv:astro-ph/0112019
- Bibcode:
- 2002ASPC..271..309G
- Keywords:
-
- Astrophysics
- E-Print:
- 4 pages, 2 figures, latex, newpasp style file. To appear in "Neutron Stars in Supernova Remnants" (ASP Conference Proceedings), eds P. O. Slane and B. M. Gaensler