Astron. Astrophys. 325, L1-L4
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Letter to the Editor
A transient supersoft X-ray source in the Large Magellanic Cloud*
Marina Orio1,2, Massimo Della Valle3, Giuseppe Massone1, and Hakki Ögelman2
1 Osservatorio Astronomico di Torino, I-10025 Pino Torinese
Received 11 March 1997 / Accepted 1 April 1997
We present new X-ray data with an improved position for the supersoft X-ray source RX J0537.7-7034 and propose a candidate for the optical identification. The X-ray source had an "on" and an "off" state and was variable on a time scale of months. The proposed optical counterpart is displaced by only 9 arcsec; it is a blue variable star whith an amplitude modulation in the optical light curve. The optical spectrum shows a blue continuum and the He II 4686 emission line.
Key words: Accretion, accretion disks - Stars: binaries: close; white dwarfs - X-rays: stars.
*Partially based on observations
at ESO, La Silla.
Send offprint requests to: M. Orio
© European Southern Observatory (ESO) 1997