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D.J. Christian, M.M. Sirk, K. McDonald, and J. Edelstein
Center for EUV Astrophysics, 2150 Kittredge St., University of California,
Berkeley, CA 94720-5030, USA
We present Extreme Ultraviolet Explorer (EUVE) survey results for several directions containing moderate column low-mass X-ray binaries (LMXB). Contemporary LMXB spectral models, which involve Comptonization in an inner disk corona, predict a large flux of EUV photons. X-ray observations below 1 keV have been limited by instrumental uncertainties and often large column densities. We derive Lexan band (100 Å) fluxes and flux upper limits for several LMXB including a detection of Sco X-1. We calculate an intrinsic luminosity of 5+/-3 x 10^37 ergs/s for Sco X-1 using a distance of 1.5 kpc. This value is in agreement with the extrapolation of two-component phenomenological models (such as blackbody plus thermal bremsstrahlung) but is a factor of 2 - 3 too low for normal and flaring branch coronal models. This work is supported by NASA contract NAS5-30180.
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