We have obtained intermediate resolution optical spectra of the black-hole candidate Nova Sco 1994 in June 1996, when the source was in an X-ray/optical active...
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PublicationIrradiation of the secondary star in X-ray Nova Scorpii 1994 (=GRO J1655-40)
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NewsJames Webb telescope studies organic molecules near black holes
Research led by the University of Oxford and with the participation of the Instituto de Astrofísica de Canarias (IAC) has succeeded in studying, for the first...
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TalkJWST view of Polycyclic Aromatic Hydrocarbons and dust in local active galaxies
Nowadays, it is widely accepted that most galaxies undergo an active phase in their evolution. The impact of the energy released by active galactic nuclei (AGN)...
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TalkKyoto 3.8m segmented telescope project
The 3.8m optical and infrared telescope, which is Japan's first segmented mirror telescope, is now being constructed using the world's first super high...
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PublicationLens parameters for Gaia18cbf - a long gravitational microlensing event in the Galactic plane
Context. The timescale of a microlensing event scales as a square root of a lens mass. Therefore, long-lasting events are important candidates for massive...
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PublicationM31GC J004234+405709 (Bol 117) Observed by Chandra Is a New Transient X-Ray Source in M31: CXOM31 J004234.2+405709
In ATel #1815 we erroneously associated the globular cluster M31GC J004234+405709 (Bol 117) with object s1-1 from Williams et al. (2006, ApJ 643, 356). Bol 117...
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PublicationMagnitudes of X-ray Nova XTE J1650-500 in Quiescence
Observations of the optical counterpart to XTE J1650-500 with the Magellan 1 telescope find it fainter than expected based on reports of it's possible detection...
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PublicationMass Measurements of Stellar and Intermediate-Mass Black Holes
We discuss the method, and potential systematic effects therein, used for measuring the mass of stellar-mass black holes in X-ray binaries. We restrict our...
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PublicationMass Ratio Determination from H α Lines in Black Hole X-Ray Transients
We find that the mass ratio q in quiescent black hole (BH) X-ray transients is tightly correlated with the ratio of the double-peak separation (DP) to the full...