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astro-ph.HE2023
Evidence for a black hole in the historical X-ray transient A 1524-61 (=KY TrA)
I. V. Yanes-Rizo, M. A. P. Torres, J. Casares +5
We present VLT spectroscopy, high-resolution imaging and time-resolved photometry of KY TrA, the optical counterpart to the X-ray binary A 1524-61. We perform a refined astrometry…
astro-ph.HE2023
The orbital period, black hole mass and distance to the X-ray transient GRS 1716-249 (=N Oph 93)
J. Casares, I. V. Yanes-Rizo, M. A. P. Torres +7
We present evidence for a 0.278(8) d (=6.7 h) orbital period in the X-ray transient GRS 1716-249 (=N Oph 93), based on a superhump modulation detected during the 1995 mini-outburst…