53 citations · 92 across the 5 of their papers we have counts for
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Do Ultraluminous X-Ray Sources Exist in Dwarf Galaxies?
Douglas A. Swartz, Roberto Soria, Allyn F. Tennant
A thorough search for Ultraluminous X-ray source candidates within the Local Volume is made. The search spatially matches potential ULXs detected in X-ray images or cataloged in th…
Optical Spectroscopy of the environment of a ULX in NGC 7331
Pavel K. Abolmasov, Douglas A. Swartz, S. Fabrika +3
Optical photometric and spectroscopic data are presented that show an association of an ultraluminous X-ray source in NGC 7331 with a young star cluster of mass 1.1e5 solar masses…
Discovery of a 3.6-hr Eclipsing Luminous X-Ray Binary in the Galaxy NGC 4214
Kajal K. Ghosh, Saul Rappaport, Allyn F. Tennant +3
We report the discovery of an eclipsing X-ray binary with a 3.62-hr period within 24" of the center of the dwarf starburst galaxy NGC 4214. The orbital period places interesting co…
On the nature of the ultraluminous X-ray transient in Cen~A (NGC 5128)
Kajal K. Ghosh, Mark H. Finger, Douglas A. Swartz +2
We combine 9 ROSAT, 9 Chandra, and 2 XMM-Newton observations of the Cen~A galaxy to obtain the X-ray light curve of 1RXH J132519.8-430312 (=CXOU J132519.9430317) spanning 1990 t…
A Multi-wavelength Study of the X-ray Sources in NGC 5018
Kajal K. Ghosh, Douglas A. Swartz, Allyn F. Tennant +2
The E3 giant elliptical galaxy NGC5018 was observed with the Chandra X-ray Observatory on 14 April 2001. Results of analysis of these X-ray data as well as of complementary optical…
Precise Localization of the Soft Gamma Repeater SGR 1627-41 and the Anomalous X-ray Pulsar AXP 1E1841-045 with Chandra
S. Wachter, S. Patel, C. Kouveliotou +7
We present precise localizations of AXP 1E1841-045 and SGR 1627-41 with Chandra. We obtained new infrared observations of SGR 1627-41 and reanalyzed archival observations of AXP 1E…