90 citations · 231 across the 7 of their papers we have counts for
6 papers · 1 filter
Cyclical period changes in HT Cas: a clear difference between systems above and below the period gap
B. W. Borges, R. Baptista, C. Papadimitriou +1
We report the identification of cyclical changes in the orbital period of the eclipsing cataclysmic variable HT Cas. We measured new white dwarf mid-eclipse timings and combined wi…
HS1857+5144: A hot and young pre-cataclysmic variable
A. Aungwerojwit, B. T. Gaensicke, P. Rodriguez-Gil +5
We report the discovery of a new white dwarf/M dwarf binary, HS1857+5144, identified in the Hamburg Quasar Survey (HQS). Time-resolved optical spectroscopy and photometry were carr…
SW Sextantis stars: the dominant population of CVs with orbital periods between 3-4 hours
P. Rodriguez-Gil, B. T. Gaensicke, H. -J. Hagen +15
[Abridged] We present time-series optical photometry of five new CVs identified by the Hamburg Quasar Survey. The eclipses observed in HS 0129+2933, HS 0220+0603, and HS 0455+8315…
Cataclysmic variables from a ROSAT/2MASS selection I: Four new intermediate polars
B. T. Gaensicke, T. R. Marsh, A. Edge +8
We report the first results from a new search for cataclysmic variables (CVs) using a combined X-ray (ROSAT) / infrared (2MASS) target selection that discriminates against backgrou…
The XMM-Newton/2dF survey IV. The X-ray spectral properties of the hard sources
I. Georgantopoulos, A. Georgakakis, A. Akylas +4
We present an analysis of the X-ray spectral properties of 61 hard X-ray selected (2-8 keV) sources from the bright ( \funits) {\it XMM-Newton}/2dF survey. Th…
5 Poster Contributions in the MPA/ESO Conference "Evolution of large-scale structure", Garching, August 1998
Cosmology, Xray group, : +5
Poster Titles: (1) Optical to IRAS galaxy bias factors using the Local Group Dipole (2) The X-ray Luminosity Function of Local Galaxies (3) The ROSAT X-ray Background Dipole (4) Th…