ASCA X-ray Observations of Two Contact Binaries: SW Lacertae and W Ursae Majoris

Details ASCA X-ray Observations of Two Contact Binaries: SW Lacertae and W Ursae Majoris ASCA X-ray Observations of Two Contact Binaries: SW Lacertae and W Ursae Majoris

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jass...14...18c&link_type=abstract

Journal of Astronomy and Space Science, vol. 14, no. 1, p. 18-23

Astronomy and Astrophysics

Astronomy

Scientific paper

We present X-ray light curves and the energy spectra for two contact binaries SW Lac and W UMa, which are obtained from the ASCA observations. We find that both sources show appreciable flux variations during the observations, and the variations are erratic and are not orbital-phase dependent. From a spectral analysis, we also find that the W UMa spectrum can be reproduced by a variable-abundance plasma model with a single temperature of T_1 = 6.8 x 10^6 K, while the SW Lac spectrum requires two different temperatures: T_1 = 6.5 x 10^6 K and T_2 = 1.4 x 10^7 K.

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