135 citations · 740 across the 15 of their papers we have counts for
4 papers · 1 filter
CXOGBSJ174444.7-260330: a new long orbital period cataclysmic variable in a low state
E. M. Ratti, T. F. J. van Grunsven, P. G. Jonker +12
We present phase-resolved spectroscopy and photometry of a source discovered with the Chandra Galactic Bulge Survey (GBS), CXOGBSJ174444.7-260330 (aka CX93 and CX153 in the previou…
The nature of the bright ULX X-2 in NGC3921: a Chandra position and HST candidate counterpart
P. G. Jonker, M. Heida, M. A. P. Torres +6
We report on Chandra observations of the bright ultra-luminous X-ray (ULX) source in NGC3921. Previous XMM observations reported in the literature show the presence of a bright ULX…
The black hole candidate XTE J1752-223 towards and in quiescence: optical and simultaneous X-ray - radio observations
E. M. Ratti, P. G. Jonker, J. C. A. Miller-Jones +10
We present optical, X-ray and radio observations of the black hole transient (BHT) XTE J1752-223 towards and in quiescence. Optical photometry shows that the quiescent magnitude of…
On the harmonics of the low-frequency quasi-periodic oscillation in GRS 1915+105
E. M. Ratti, T. M. Belloni, S. E. Motta
GRS 1915+105 is a widely studied black hole binary, well known because of its extremely fast and complex variability. Flaring periods of high variability alternate with "stable" ph…