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The ultraluminous X-ray source NGC 1313 X-2 - Its optical counterpart and environment
F. Grisé, M. W. Pakull, R. Soria +4
NGC 1313 X-2 is one of the brightest ultraluminous X-ray sources in the sky, at both X-ray and optical wavelengths; therefore, quite a few studies of available ESO VLT and HST data…
Ultraluminous X-ray Sources: Bubbles and Optical Counterparts
Manfred W. Pakull, Fabien Grise, Christian Motch
Optical studies of ultraluminous X-ray sources (ULX) in nearby galaxies have turned out to be instrumental in discriminating between various models including the much advertised in…
The Ultraluminous X-ray Source IC342 X-1 and its Environment
Fabien Grise, Manfred W. Pakull, Christian Motch
We present optical observations of a ULX in the nearby spiral galaxy IC 342. This variable source has an average X-ray luminosity of some 10^{40} erg/s. At the position of the sour…
The Ultraluminous X-ray Source in Holmberg IX and its Environment
Fabien Grise, Manfred W. Pakull, Christian Motch
We present optical observations of an ultraluminous X-ray source (ULX) in Holmberg IX, a dwarf galaxy near M81. The ULX has an average X-ray luminosity of some 10^{40} erg/s. It is…