56 citations · 243 across the 8 of their papers we have counts for
8 papers
Cyclical period changes in Z Chamaeleontis
R. Baptista, F. Jablonski, E. Oliveira +3
We report the identification of cyclical changes in the orbital period of the eclipsing dwarf nova Z Cha. We used times of mid-eclipse collected from the literature and our new ecl…
Changes in the structure of the accretion disc of EX Draconis through the outburst cycle
Raymundo Baptista, M. S. Catalan
(Abridged) We report on the analysis of high-speed photometry of the dwarf nova EX Dra through its outburst cycle with eclipse mapping techniques. The eclipse maps show evidence of…
A spiral structure in the disk of EX Draconis on the rise to outburst maximum
Raymundo Baptista, M. S. Catalan
We report on the R-band eclipse mapping analysis of high-speed photometry of the dwarf nova EX Dra on the rise to the maximum of the November 1995 outburst. The eclipse map shows a…
Eclipse studies of the dwarf-nova Ex Draconis
R. Baptista, M. S. Catalan, L. Costa
We report on high speed photometry of EX Dra in quiescence and in outburst. The analysis of the lightcurves indicates that the outbursts do not start in the outer disc regions. The…
Multi-epoch Doppler tomography and polarimetry of QQ Vul
A. D. Schwope, Maria S. Catalan, Klaus Beuermann +3
(abridged abstract) We present multi-epoch high-resolution spectroscopy and photoelectric polarimetry of the long-period polar (AM Herculis star) QQ Vul. The blue emission lines sh…
The ``Outside-In'' Outburst of HT Cassiopeiae
Zach Ioannou, T. Naylor, W. F. Welsh +3
We present results from photometric observations of the dwarf nova system HT Cas during the eruption of November 1995. The data include the first two--colour observations of an ecl…
Changes in the structure of the accretion disc of HS1804+67 through the outburst cycle
Raymundo Baptista, M. S. Catalan
We report on the analysis of high-speed photometry of the dwarf-nova HS1804+67 through its outburst cycle with eclipse mapping techniques. Eclipse maps show evidences of the format…
HST and ground-based eclipse observations of V2051 Ophiuchi: Binary parameters
Raymundo Baptista, M. S. Catalan, Keith Horne +1
We report on high-speed eclipse photometry of the dwarf nova V2051 Oph while it was in a low brightness state, at B ~ 16.2 mag. In comparison to the average IUE spectra, the ultrav…