AAS 204th Meeting, June 2004
Session 49 X-ray Binary and ULX Populations in Nearby Galaxies
Topical Session, Wednesday, June 2, 2004, 8:30-10:00am, 10:45am-12:30pm, 2:30-4:00pm, 4:15-6:00pm, 601

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[49.09] Recent Observations of the peculiar ULX M101 P98

K. Mukai (NASA/GSFC and USRA), K.D. Kuntz (UMBC), Chandra/HST M101 Collaboration

In the original 100 ksec Chandra observation of M101, we identified P98 as a highly variable, soft ULX. Since then, we have obtained HST/ACS observations, which reveal a possible optical counterpart. We have also obtained new Chandra data, which show this source in a different spectral state. Based on these data, we consider the nature of the compact object, the nature of the mass donor, and the evolutionary status of this binary system.

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