Multiwavelength Test For A Standard Accretion Disk Around An Intermediate BHC

Recent Xray and optical observations suggest that the supersoft ultraluminousXray source in NGC 247 is an interesting candidate for an intermediate massblack hole, based on the fact that emission from an unusually cool and luminousaccretion disk can explain multiwavelength data across 3 orders of magnitudes inwavelength. If the disk interpretation is valid, the source is predicted to beUVluminous. Thus, we propose joint HST/XMMNewton observations of the sourcefor a definitive test of of the disk scenario and reliable measurement of theblack hole mass. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]