39 citations · 59 across the 2 of their papers we have counts for
6 papers · 1 filter
New XMM-Newton analysis of three bright X-ray sources in M31 globular clusters, including a new black hole candidate
R. Barnard, H. Stiele, D. Hatzidimitriou +6
We present detailed analysis of three globular cluster X-ray sources in the XMM-Newton extended survey of M31. The X-ray counterpart to the M31 globular cluster Bo 45 (XBo 45) was…
The Ultraluminous X-ray Sources near the Center of M82
A. K. H. Kong, Y. J. Yang, P. -Y. Hsieh +2
We report the identification of a recurrent ultraluminous X-ray source (ULX), a highly absorbed X-ray source (possibly a background AGN), and a young supernova remnant near the cen…
An Unusual Spectral State of an Ultra-luminous Very Soft X-ray Source during Outburst
A. K. H. Kong, R. Di Stefano
We report the results of Chandra and XMM-Newton observations of a new outburst of an ultra-luminous X-ray source in M101. During a Chandra monitoring observation of M101, M101 ULX-…
Evidence for an Intermediate-Mass Black Hole: Chandra and XMM-Newton Observations of the Ultraluminous Supersoft X-ray Source in M101 during its 2004 Outburst
A. K. H. Kong, R. Di Stefano, F. Yuan
We report the results of Chandra and XMM-Newton observations of a new outburst of an ultraluminous supersoft X-ray source in M101. CXOU J140332.3+542103 was observed in a low lumin…
Correlated X-ray and Optical Variability in V404 Cyg in Quiescence
R. I. Hynes, P. A. Charles, M. R. Garcia +11
We report simultaneous X-ray and optical observations of V404 Cyg in quiescence. The X-ray flux varied dramatically by a factor of >20 during a 60ks observation. X-ray variations w…
A Luminous Recurrent Supersoft X-ray Source in NGC 300
A. K. H. Kong, R. Di Stefano
We report the results of XMM-Newton observations for an especially luminous supersoft X-ray source (SSS) with bolometric luminosity of 10^39 erg/s in the spiral galaxy NGC 300. The…