An Unusual Spectral State of an Ultraluminous Very Soft X-Ray Source during Outburst
An Unusual Spectral State of an Ultraluminous Very Soft X-Ray Source during Outburst
We report the results of Chandra and XMM-Newton observations of a new outburst of an ultraluminous X-ray source in M101. During a Chandra monitoring observation of M101, M101 ULX-1 was found to be in outburst in 2004 December, the second outburst in 2004. The peak bolometric luminosity is about 3 …