The optimal counterpart of the superluminal source GRO J1655-40
Article Abstract:
The optical counterpart of Galactic superluminal source GRO J1655-40 is expected to be at a distance of only 3 kpc from GRO. Historical photographic plates may have identified the precursor because it brightened by 3 mag in the V bandpass at the time of the X-ray burst in Aug 1994. The 12 day delay between the X ray burst and the main radio outburst indicating the start of superluminal motion is still a riddle to solved. GRO J1655-40's optical wavelength characteristics are like those of other accreting-black-hole candidates.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Next swing of the pendulum
Article Abstract:
Two new papers on globular star clusters suggest that these objects may contain black holes. Once a popular theoretical explanation for cluster X-ray sources, black holes fell from favor when X-ray sources were found to be binary, therefore more likely the result of binary star systems in which a neutron star accreted materiel from its companion. Interest in supernova modelling re-surged in 1987, bringing back with it the idea that supernova explosions leave behind black holes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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A 15.65-solar-mass black hole in an eclipsing binary in the nearby spiral galaxy M 33
Article Abstract:
A mass of 15.65 M black hole discovered by the X-ray-emitting binary system located in the galaxy Messier 33 (M33) is reported.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
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