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A 2 epoch proper motion catalogue from the UKIDSS Large Area Survey
(EDP Sciences, 2013)
The UKIDSS Large Area Survey (LAS) began in 2005, with the start of the UKIDSS program as a 7 year effort to survey roughly 4000 square degrees at high galactic latitudes in Y, J, H and K bands. The survey also included a ...
Purple dwarfs : New L subdwarfs from UKIDSS and SDSS
(EDP Sciences, 2013)
The first L subdwarf was a discovered only ten years ago. Less than ten L subdwarfs been published in the literature to date. Metal-poor ultracool atmospheres has not been well understood. Halo mass function cross substellar ...
Periodic variability of spotted M dwarfs in WTS
(EDP Sciences, 2013)
We present an analysis of the photometric variability of M dwarfs in the WFCAM Transit Survey, selected from spectral types inferred by their WTS and SDSS colours, with periods detected using a Lomb-Scargle Periodogram ...
Red Optical Planet Survey : A radial velocity search for low mass M dwarf planets
(EDP Sciences, 2013)
We present radial velocity results from our Red Optical Planet Survey (ROPS), aimed at detecting low-mass planets orbiting mid-late M dwarfs. The similar to 10 ms(-1) precision achieved over 2 consecutive nights with the ...
Status of the Calan-Hertfordshire Extrasolar Planet Search
(EDP Sciences, 2013)
In these proceedings we give a status update of the Calan-Hertfordshire Extrasolar Planet Search, an international collaboration led from Chile that aims to discover more planets around super metal-rich and Sun-like stars, ...
Identifying ultra-cool dwarfs at low Galactic latitudes : a southern candidate catalogue
(2012-12)
We present an ultra-cool dwarf (UCD) catalogue compiled from low southern Galactic latitudes and mid-plane, from a cross-correlation of the Two Micron All-Sky Survey (2MASS) and the SuperCOSMOS survey. The catalogue contains ...
J-band variability of M dwarfs in the WFCAM Transit Survey
(2012-12)
We present an analysis of the photometric variability of M dwarfs in the Wide Field Camera (WFCAM) Transit Survey. Although periodic light-curve variability in low mass stars is generally dominated by photospheric star ...
The brightest pure-H ultracool white dwarf
(2012-10)
We report the identification of LSR J0745+2627 in the United Kingdom InfraRed Telescope Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) as a cool white dwarf with kinematics and age compatible with the thick-disk/halo ...
BASIS: Bayfordbury single-object integral field spectrograph
(SPIE, 2012-09)
We present an inexpensive (<US$500) and easily replicable integral field unit for use on small aperture telescopes. Based on a commercial small spectrograph (SBIG Self-Guiding Spectrograph) and a 37 optical fibre bundle ...
Probabilities of exoplanet signals from posterior samplings
(2012-08-12)
Estimating the marginal likelihoods is an essential feature of model selection in the Bayesian context. It is especially crucial to have good estimates when assessing the number of planets orbiting stars when the models ...