SSS: More photometric observations of RX J0019.8+2156

Bartolini, C.; Guarnieri, A.; Iannone, G.; Piccioni, A.; Solmi, L.
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p231
Academic Journal
We present new photometric data of the galactic supersoft X-ray source (SSS) RX J0019.8+2156 taken in Johnson’s V band at Loiano Observatory with a two head photoelectric photometer between December 1994 and October 1997. Our observations confirm those already reported by Greiner & Wenzel (1995), Matsumoto (1996), Deufel et al. (1998) and Will & Barwig (1996), as far as orbital period, depth of the light curve, and presence of a secondary minimum are concerned. Considering the years 1955–1997 we found no indication for a period change. The H burning white dwarf model (van den Heuvel et al., 1992) seems to be most capable of explaining the observed phenomena, although the results by Meyer-Hofmeister et al. (1998) are of further interest. Also we propose here that the system is seen at a high orbital inclination, high enough to produce partial eclipses of the accretion disk. © 2000 American Institute of Physics.


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