Suzaku Observations of Spectral Variations of the Ultra Luminous X-ray Source Holmberg IX X-1

Shogo B. Kobayashi, Kazuhiro Nakazawa, Kazuo Makishima

Observations of the Ultra Luminous X-ray source (ULX) Holmberg IX X-1 were carried out with Suzaku twice, once on 2012 April 13 and then on 2012 October 24, with exposures of 180 k…