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K. Mukai, M. Still (NASA/GSFC and USRA), F. Ringwald (California State University, Fresno)
DQ~Herculis (=Nova Herculis 1934) is a deeply eclipsing cataclysmic variable containing a magnetic white dwarf primary. The spin of the white dwarf is indirectly detected in the optical as a 71-s oscillation, which is believed to be due to reprocessing in the accretion disk of X-ray and EUV radiations from the poles. The accretion disk is thought to block our line of sight to the white dwarf at all orbital phases. Nevertheless, soft X-rays have been detected from DQ~Her with ROSAT\/ PSPC. We present preliminary results of our Chandra\/ ACIS imaging observations of DQ~Her, confirming the ROSAT\/ detection. The point-like X-ray source exhibits a partial eclipse which is shallow but flat-bottomed. We discuss the possible location and size of the X-ray emitting region(s).