142 citations · 798 across the 14 of their papers we have counts for
14 papers
ULTRASPEC: a high-speed imaging photometer on the 2.4-m Thai National Telescope
V. S. Dhillon, T. R. Marsh, D. C. Atkinson +18
ULTRASPEC is a high-speed imaging photometer mounted permanently at one of the Nasmyth focii of the 2.4-m Thai National Telescope (TNT) on Doi Inthanon, Thailand's highest mountain…
Optical transmission photometry of the highly inflated exoplanet WASP-17b
J. Bento, P. J. Wheatley, C. M. Copperwheat +7
We present ground-based high-precision observations of the transit of WASP-17b using the multi-band photometer ULTRACAM on ESO's NTT in the context of performing transmission spect…
Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands
C. M. Copperwheat, P. J. Wheatley, J. Southworth +6
Transmission spectroscopy has been successfully used from both the ground and in space to characterise the atmospheres of transiting exoplanets. This technique is challenging from…
HS 2325+8205 - an ideal laboratory for accretion disk physics
S. Pyrzas, B. T. Gaensicke, J. R. Thorstensen +12
We identify HS 2325+8205 as an eclipsing, frequently outbursting dwarf nova with an orbital period of 279.841731(5) min. Spectroscopic observations are used to derive the radial ve…
A J-band detection of the donor star in the dwarf nova OY Carinae, and an optical detection of its `iron curtain'
C. M. Copperwheat, T. R. Marsh, S. G. Parsons +6
Purely photometric models can be used to determine the binary parameters of eclipsing cataclysmic variables with a high degree of precision. However, the photometric method relies…
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…
Orbital Period Variations in Eclipsing Post Common Envelope Binaries
S. G. Parsons, T. R. Marsh, C. M. Copperwheat +10
We present high speed ULTRACAM photometry of the eclipsing post common envelope binaries DE CVn, GK Vir, NN Ser, QS Vir, RR Cae, RX J2130.6+4710, SDSS 0110+1326 and SDSS 0303+0054…
Physical properties of IP Pegasi: an eclipsing dwarf nova with an unusually cool white dwarf
C. M. Copperwheat, T. R. Marsh, V. S. Dhillon +4
We present high speed photometric observations of the eclipsing dwarf nova IP Peg taken with the triple-beam camera ULTRACAM mounted on the William Herschel Telescope. The primary…
Orbital periods of cataclysmic variables identified by the SDSS. VI. The 4.5-hr period eclipsing system SDSS J100658.40+233724.4
John Southworth, R. D. G. Hickman, T. R. Marsh +4
We present time-resolved spectroscopy and photometry of SDSS J100658.40+233724.4, which we have discovered to be an eclipsing cataclysmic variable with an orbital period of 0.18591…
Precise mass and radius values for the white dwarf and low mass M dwarf in the pre-cataclysmic binary NN Serpentis
S. G. Parsons, T. R. Marsh, C. M. Copperwheat +4
We derive precise system parameters for the pre-cataclysmic binary, NN Ser. From light curve fitting we find an orbital inclination of i = 89.6 +/- 0.2 deg. From the HeII absorptio…
A search for optical bursts from the rotating radio transient J1819-1458 with ULTRACAM
V. S. Dhillon, T. R. Marsh, S. P. Littlefair
We report on the search for optical bursts from J1819-1458, a member of the recently discovered Rotating Radio Transients (RRATs). J1819-1458 exhibits 3 millisecond bursts with a p…