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A precision study of two eclipsing white dwarf plus M dwarf binaries
S. G. Parsons, T. R. Marsh, B. T. Gänsicke +16
We use a combination of X-shooter spectroscopy, ULTRACAM high-speed photometry and SOFI near-infrared photometry to measure the masses and radii of both components of the eclipsing…
The first observation of optical pulsations from a soft gamma repeater: SGR 0501+4516
V. S. Dhillon, T. R. Marsh, S. P. Littlefair +9
We present high-speed optical photometry of the soft gamma repeater SGR 0501+4516, obtained with ULTRACAM on two consecutive nights approximately 4 months after the source was disc…
Cataclysmic Variables below the Period Gap: Mass Determinations of 14 Eclipsing Systems
C. D. J. Savoury, S. P. Littlefair, V. S. Dhillon +6
We present high-speed, three-colour photometry of the eclipsing cataclysmic variables CTCV 1300, CTCV 2354 and SDSS 1152. All three systems are below the observed "period gap" for…
A search for optical bursts from RRAT J1819-1458: II. Simultaneous ULTRACAM-Lovell Telescope observations
V. S. Dhillon, E. F. Keane, T. R. Marsh +10
The Rotating RAdio Transient (RRAT) J1819-1458 exhibits ~3 ms bursts in the radio every ~3 min, implying that it is visible for only ~1 per day. Assuming that the optical light beh…