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Populations of Supersoft X-ray Sources: Novae, tidal disruption, Type Ia supernovae, accretion-induced collapse, ionization, and intermediate-mass black holes?
Rosanne Di Stefano, Francis A. Primini, Jifeng Liu +2
Observations of hundreds of supersoft x-ray sources (SSSs) in external galaxies have shed light on the diversity of the class and on the natures of the sources. SSSs are linked to…
X-ray and Optical Study of Low Core Density Globular Clusters NGC6144 and E3
Shih Hao Lan, Albert K. H. Kong, Frank Verbunt +4
We report on the Chandra X-ray Observatory and Hubble Space Telescope observation of two low core density globular clusters, NGC6144 and E3. By comparing the number of X-ray source…
X-ray Sources and Their Optical Counterparts in the Galactic Globular Cluster M12 (NGC 6218)
Ting-Ni Lu, Albert K. H. Kong, Cees Bassa +4
We study a Chandra X-ray Observatory ACIS-S observation of the Galactic globular clusterM12. With a 26 ks exposure time, we detect 6 X-ray sources inside the half-mass radius (2.16…
GX 9+9: Variability of the X-Ray Orbital Modulation
Robert J. Harris, Alan M. Levine, Martin Durant +3
Results of observations of the Galactic bulge X-ray source GX 9+9 by the All-Sky Monitor (ASM) and Proportional Counter Array (PCA) onboard the Rossi X-ray Timing Explorer are pres…