Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...564l..31g&link_type=abstract
The Astrophysical Journal, Volume 564, Issue 1, pp. L31-L34.
Astronomy and Astrophysics
Astronomy
28
Stars: Individual: Alphanumeric: Kes 73, Stars: Individual: Alphanumeric: 1E 1841-045, Stars: Neutron, Ism: Supernova Remnants, X-Rays: Stars
Scientific paper
We report on a long-term monitoring campaign of 1E 1841-045, the 12 s anomalous X-ray pulsar 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 (RXTE) spanning over 2 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 measurements of the pulse period made over the last 15 years with the Ginga, ASCA, RXTE, and BeppoSAX 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.
Chakrabarty Deepto
Gavriil Fotis P.
Gotthelf Eric Van
Kaspi Victoria M.
Vasisht Gautam
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