109 citations · 164 across the 5 of their papers we have counts for
4 papers · 2 filters
Detection of the white dwarf and the secondary star in the new SU UMa dwarf nova HS 2219+1824
P. Rodriguez-Gil, B. T. Gaensicke, H. -J. Hagen +4
We report the discovery of a new, non-eclipsing SU UMa-type dwarf nova, HS 2219+1824. Photometry obtained in quiescence (V ~ 17.5) reveals a double-humped light curve from which we…
On the use of photometric redshifts for X-ray selected AGNs
S. Kitsionas, E. Hatziminaoglou, A. Georgakakis +1
(Abridged) In this paper we present photometric redshift estimates for a sample of X-ray selected sources detected in the wide field (~2 deg^2), bright [f_{X} (0.5-8 keV)~10^{-14}…
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…
HS2237+8154: On the onset of mass transfer or entering the period gap?
B. T. Gaensicke, S. Araujo-Betancor, H. -J. Hagen +4
We report follow-up observations of a new white dwarf/red dwarf binary HS2237+8154, identified as a blue variable star from the Hamburg Quasar Survey. Ellipsoidal modulation observ…