Discovery of Pulsed X-rays from the SMC Transient RX J0052.1-7319

Details Discovery of Pulsed X-rays from the SMC Transient RX J0052.1-7319 Discovery of Pulsed X-rays from the SMC Transient RX J0052.1-7319

2001-07-09

arxiv.org/abs/astro-ph/0107166v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Astrophysical Journal. 6 pages, 7 figures

Scientific paper

10.1086/322484

Coherent 65 mHz pulsations in the X-ray flux of the Small Magellantic Cloud (SMC) transient source RX J0052.1-7319 have been detected by us in an analysis of ROSAT data. We report on the pulsations we detected in ROSAT HRI data and simultaneous detection of these pulses in hard X-rays using BATSE data. The BATSE data show an outburst of the source lasting 60 days. We report on optical observations of the candidate companion, and a new source position we determined from the HRI data, which is consistent with the candidate's location. From the measured fluxes and observed frequency derivatives we exclude the possiblity that the pulsar is in the foreground of the SMC, and show that an accretion disk is present during the outburst, which peaked near Eddington luminosity.

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