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Post Common Envelope Binaries from SDSS. V: Four eclipsing white dwarf main sequence binaries
S. Pyrzas, B. T. Gänsicke, T. R. Marsh +7
We identify SDSS011009.09+132616.1, SDSS030308.35+005444.1, SDSS143547.87+373338.5 and SDSS154846.00+405728.8 as four eclipsing white dwarf plus main sequence (WDMS) binaries from…
The Seventh Data Release of the Sloan Digital Sky Survey
K. Abazajian
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDS…
Cataclysmic Variable Primary Effective Temperatures: Constraints on Binary Angular Momentum Loss
Dean M. Townsley, Boris T. Gaensicke
We review the most decisive currently available measurements of the surface effective temperatures, Teff, of white dwarf (WD) primaries in cataclysmic variables (CVs) during accret…
ULTRACAM observations of two accreting white dwarf pulsators
C. M. Copperwheat, T. R. Marsh, V. S. Dhillon +6
In this paper we present high time-resolution observations of GW Librae and SDSS J161033.64-010223.3 -- two cataclysmic variables which have shown periodic variations attributed to…
The fainter the better: cataclysmic variable stars from the SDSS
John Southworth, B T Gaensicke, T R Marsh
The Sloan Digital Sky Survey has identified a total of 212 cataclysmic variables, most of which are fainter than 18th magnitude. This is the deepest and most populous homogeneous s…
SDSSJ084539.17+225728.0: the first DBZ white dwarf with a metal-rich gaseous debris disc
B. T. Gaensicke, D. Koester, T. R. Marsh +2
We report the discovery of a third white dwarf hosting a gaseous debris disc, SDSSJ084539.17+225728.0. The typical double-peaked CaII 8498,8542,8662A emission lines can be modelled…
SCP06F6: A carbon-rich extragalactic transient at redshift z~0.14?
B. T. Gaensicke, A. J. Levan, T. R. Marsh +1
We show that the spectrum of the unusual transient SCP06F6 is consistent with emission from a cool, optically thick and carbon-rich atmosphere if the transient is located at a reds…
Post Common Envelope Binaries from SDSS - III. Seven new orbital periods
A. Rebassa-Mansergas, B. T. Gaensicke, M. R. Schreiber +11
We present follow-up spectroscopy and photometry of 11 post common envelope binary (PCEB) candidates identified from multiple Sloan Digital Sky Survey (SDSS) spectroscopy in an ear…
Two new Intermediate Polars with a soft X-ray component
G. Anzolin, D. de Martino, J. -M. Bonnet-Bidaud +4
We analyze the first X-ray observations with XMM-Newton of RXS J070407.9+262501 and 1RXS 180340.0+401214, in order to characterize their broad-band temporal and spectral properties…
GD 552: a cataclysmic variable with a brown dwarf companion?
E. Unda-Sanzana, T. R. Marsh, B. T. Gansicke +7
GD 552 is a high proper motion star with the strong, double-peaked emission lines characteristic of the dwarf nova class of cataclysmic variable star, and yet no outburst has been…
On the evolutionary status of short period cataclysmic variables
S. P. Littlefair, V. S. Dhillon, T. R. Marsh +5
(Abridged) We present high-speed, three-colour photometry of seven short period (Porb <= 95 mins) eclipsing CVs from the Sloan Digital Sky Survey. We determine the system parameter…
1RXSJ173021.5-055933: a cataclysmic variable with a fast-spinning magnetic white dwarf
D. de Martino, G. Matt, K. Mukai +8
We present the first X-ray observations with the XMM-Newton and INTEGRAL satellites of the recently discovered cataclysmic variable 1RXSJ173021.5-055933, together with simultaneous…
Newly Discovered Cataclysmic Variables from the INT/WFC Photometric H alpha Survey of the Northern Galactic Plane
A. R. Witham, C. Knigge, A. Aungwerojwit +7
We report the discovery of 11 new cataclysmic variable (CV) candidates by the Isaac Newton Telescope (INT) Photometric H alpha Survey of the northern Galactic plane (IPHAS). Three…
The pre-cataclysmic variable, LTT560
C. Tappert, B. T. Gaensicke, L. Schmidtobreick +3
System parameters of the object LTT560 are determined in order to clarify its nature and evolutionary status. We apply time-series photometry to reveal orbital modulations of the l…
Post common envelope binaries from SDSS. II: Identification of 9 close binaries with VLT/FORS2
M. R. Schreiber, B. T. Gaensicke, J. Southworth +2
The Sloan Digital Sky Survey turned out to be very efficient in identifying white dwarf/main sequence binaries (WDMS). The population of WDMS systems consists of wide systems whose…
SDSS J150722.30+523039.8: a CV formed directly from a detached white dwarf/brown dwarf binary?
S. P. Littlefair, V. S. Dhillon, T. R. Marsh +3
We present high-speed, three-colour photometry of the eclipsing cataclysmic variable SDSS J150722.30+523039.8 (hereafter SDSS J1507). This system has an orbital period of 66.61 min…
Post Common Envelope Binaries from SDSS. I: 101 white dwarf main sequence binaries with multiple SDSS spectroscopy
A. Rebassa-Mansergas, B. T. Gaensicke, P. Rodriguez-Gil +2
We present a detailed analysis of 101 white dwarf-main sequence binaries (WDMS) from the Sloan Digital Sky Survey (SDSS) for which multiple SDSS spectra are available. We detect si…
Discovery of two new accreting pulsating white dwarf stars
Anjum S. Mukadam, B. T. Gänsicke, P. Szkody +4
We report the discovery of two new accreting pulsating white dwarf stars amongst the cataclysmic variables of the Sloan Digital Sky Survey: SDSSJ074531.91+453829.5 and SDSSJ091945.…
K-band spectroscopy of pre-cataclysmic variables
C. Tappert, B. T. Gaensicke, L. Schmidtobreick +2
We have taken K-band spectroscopy of a sample of 13 pre-CVs in order to examine them for anomalous chemical abundances. In particular, we study the strength of the 12CO and 13CO ab…
Dynamical constraints on the component masses of the cataclysmic variable WZ Sge
D. Steeghs, S. Howell, C. Knigge +3
We present phase-resolved spectroscopy of the short period cataclysmic variable WZ Sge obtained with the Hubble Space Telescope. We were able to resolve the orbital motion of a num…
SDSSJ104341.53+085558.2: A second white dwarf with a gaseous debris disc
B. T. Gaensicke, T. R. Marsh, J. Southworth
Intermediate resolution spectroscopy of the white dwarf SDSSJ104341.53+085558.2 contains double-peaked emission lines of CaII8498,8542,8662 and identifies this object to be the sec…
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…
MV Lyrae in Low, Intermediate, and High States
Albert P. Linnell, Paula Szkody, Boris Gansicke +4
We use analysis results from a low state of the VY Sculptoris system MV Lyrae, considered in an earlier paper (Hoard et al., 2004, ApJ, 604, 346), to study archival IUE spectra tak…