Physics
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..261..173s&link_type=abstract
The Physics of Cataclysmic Variables and Related Objects, ASP Conference Proceedings, Vol. 261. Edited by B. T. Gänsicke, K. Beu
Physics
Scientific paper
The XMM-Newton pointing towards the magnetic cataclysmic variable UZ For finds the source to be a factor > 103 fainter than previous EXOSAT and ROSAT observations. The source was not detected for the majority of a 22 ksec exposure with the EPIC cameras, suggesting that the accretion rate either decreased, or stopped altogether. However a 1.1 ksec burst was detected from UZ For during the observation. Spectral fits favour optically thin, kT = 4.4+7.6-1.8 keV thermal emission. Detection of the burst by the on-board Optical Monitor indicates that this was most probably an accretion event. The 0.1--10 keV luminosity of 2.1+0.6-0.3 [1] times 10#1 30erg s-1 is typical for accretion shock emission from high state polars and would result from the potential energy release of ~1016g of gas. There is no significant soft excess due to reprocessing in the white dwarf atmosphere. Based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).
Mukai Kazuhiko
Still Martin
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