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The 2003 Nov 14 occultation by Titan of TYC 1343-1865-1. II. Analysis of light curves
A. Zalucha, A. Fitzsimmons, J. L. Elliot +6
We observed a stellar occultation by Titan on 2003 November 14 from La Palma Observatory using ULTRACAM with three Sloan filters: u', g', and i' (358, 487, and 758 nm, respectively…
Metal-rich debris discs around white dwarfs
B. T. Gaensicke, T. R. Marsh, J. Southworth +1
We have identified two moderately hot (~18000-22000K) white dwarfs, SDSSJ1228+1040 and SDSSJ1043+0855, which exhibit double-peaked emission lines in the CaII 8600A triplet. These l…
Bowen blend echo-tomography of low mass X-ray binaries
T. Muñoz-Darias, I. G. Martinez-Pais, J. Casares +7
We present simultaneous high time resolution (1-10 Hz) X-ray and optical observations of the persistent LMXBs Sco X-1 and V801 Ara(=4U 1636-536). In the case of Sco X-1 we find tha…
The long-period AM CVn star SDSS J155252.48+320150.9
G. H. A. Roelofs, P. J. Groot, D. Steeghs +2
The Sloan Digital Sky Survey has been instrumental in obtaining a homogeneous sample of the rare AM CVn stars: mass-transferring binary white dwarfs. As part of a campaign of spect…
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…
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…