Long-term RXTE monitoring of the anomalous X-ray pulsar 1E 1048.1–5937 | Zendy

V. M. Kaspi | Zendy

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Long-term RXTE monitoring of the anomalous X-ray pulsar 1E 1048.1–5937

Author(s) -

V. M. Kaspi

Publication year - 2001

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.1419600

Subject(s) - pulsar , physics , astrophysics , magnetar , astronomy , neutron star , flux (metallurgy) , x ray pulsar , static timing analysis , glitch , materials science , computer science , metallurgy , embedded system , detector , optics

We report on long-term monitoring of the anomalous X-ray pulsar 1E1048.1-5937 using the Rossi X-ray Timing Explorer. This pulsar's timingbehavior is different from that of other AXPs. In particular, the pulsar showssignificant deviations from simple spin-down such that phase-coherent timinghas not been possible over time spans longer than a few months. We show that inspite of the rotational irregularities, the pulsar exhibits neither pulseprofile changes nor large pulsed flux variations. We discuss the implicationsof our results for AXP models. We suggest that 1E 1048.1-5937 may be atransition object between the soft gamma-ray repeater and AXP populations, andthe AXP most likely to one day undergo an outburst.Comment: 6 pages, to appear in Proceedings of the 20th Texas Symposium on Relativistic Astrophysics, AIP pres

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