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Astron. Astrophys. 353, 129-134 (2000)

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A multi-frequency study of the SMC region around AX J0105-722

M.D. Filipovi 1,2,3, F. Haberl 1, W. Pietsch 1 and D.H. Morgan 4

1 Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, 85740 Garching, Germany (fica, fwh, wnp@mpe.mpg.de)
2 University of Western Sydney, Nepean, P.O. Box 10, Kingswood NSW 2747, Australia
3 Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping NSW 2121, Australia
4 Institute for Astronomy, University of Edinburgh, Blackford Hill EH9 3HJ, UK (dhm@roe.ac.uk)

Received 25 August 1999 / Accepted 27 October 1999


We present a high-resolution multi-frequency study of the Small Magellanic Cloud (SMC) region around the X-ray pulsar AX J0105-722. From ROSAT PSPC images we resolve this source into several X-ray sources. We combine X-ray, radio-continuum and optical data to identify the sources: for RX J0105.1-7211 we propose an emission line star from the catalogue of Meyssonier & Azzopardi (1993) in the X-ray error circle as the likely optical counterpart. This catalogue contains several known Be/X-ray binaries strongly suggesting RX J0105.1-7211 as new Be/X-ray binary in the SMC. RX J0105.1-7211 is most probably also the counterpart of the ASCA X-ray pulsar AX J0105-722 . RX J0105.4-7209 confirms DEM S128 as supernova remnant (SNR) and RX J0105.5-7213 is very likely a background AGN.

Key words: galaxies: Magellanic Clouds – ISM: individual objects: AX J0105-722 – ISM: individual objects: DEM S128 – ISM: supernova remnants – stars: binaries: general – X-rays: galaxies

Send offprint requests to: M.D. Filipovi

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© European Southern Observatory (ESO) 2000

Online publication: December 8, 1999