15 Years Going Steady - Timing the Magnetar 1E 1841-045

E. V. Gotthelf; F. P. Gavriil; V. M. Kaspi; G. Vasisht; Deepto Chakrabarty

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15 Years Going Steady - Timing the Magnetar 1E 1841-045

E. V. Gotthelf·F. P. Gavriil·V. M. Kaspi·G. Vasisht·Deepto Chakrabarty

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Abstract

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 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.

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E. V. Gotthelf, F. P. Gavriil, V. M. Kaspi, G. Vasisht, Deepto Chakrabarty. 2001-12-02. 15 Years Going Steady - Timing the Magnetar 1E 1841-045. https://arxiv.org/abs/astro-ph/0112019

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