Matthew G. Coleman

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Microsatellite instability (MSI) in colorectal tumours is demonstrated by PCR amplification of several different microsatellite loci. Minisatellites, which are repeats of longer sequences also found throughout the genome, may also be affected by tumorigenesis. Certain minisatellite alleles contain 2 types of similar repeat unit that are randomly(More)
We present the first deep color-magnitude diagram of the Canes Venatici I (CVn I) dwarf galaxy from observations with the wide-field Large Binocular Camera on the Large Binocular Telescope. Reaching down to the main-sequence turnoff of the oldest stars, it reveals a dichotomy in the stellar populations of CVn I: it harbors an old ( 10 Gyr), metal-poor ( ),(More)
We have used the two-degree field (2dF) multi-fibre spectrograph of the AngloAustralian Telescope to search for candidate members of the unusual globular cluster ω Centauri at and beyond the cluster tidal radius. Velocities with an accuracy of ∼10 km s−1 were obtained for 4105 stars selected to lie in the vicinity of the lower giant branch in the cluster(More)
Based on a deep imaging survey, we present the first homogeneous star formation history (SFH) of the Fornax dwarf spheroidal (dSph) galaxy. We have obtained two-filter photometry to a depth of B ∼ 23 over the entire surface of Fornax, the brightest dSph associated with the Milky Way, and derived its SFH using a CMD-fitting technique. We show that Fornax has(More)
At the end of last century, nine dwarf spheroidal (dSph) galaxies were known to orbit the Milky Way. This number has doubled in the past three years, with the majority of new discoveries achieved with the Sloan Digital Sky Survey. In this contribution we present the first deep photometry for two recently discovered Local Group dwarf galaxies. The Hercules(More)
The results of a wide-field survey of the Sculptor dwarf spheroidal galaxy are presented. Our aims were to obtain an accurate map of the outer structure of Sculptor, and to determine the level of interaction between this system and the Galaxy. Photometry was obtained in two colours down to the magnitude limits of V = 20 and I = 19, covering a 3.1×3.1 deg(More)
We present a deep, wide-field photometric survey of the newly-discovered Hercules dwarf spheroidal galaxy, based on data from the Large Binocular Telescope. Images in B, V and r were obtained with the Large Binocular Camera covering a 23 × 23 field of view to a magnitude of ∼25.5 (5σ). This permitted the construction of colour-magnitude diagrams that reach(More)
Using SDSS I data, we have analysed the stellar distribution of the Leo II dwarf spheroidal galaxy (distance of 233 kpc) to search for evidence of tidal deformation. The existing SDSS photometric catalogue contains gaps in regions of high stellar crowding, hence we filled the area at the centre of Leo II using the DAOPHOT algorithm applied to the SDSS(More)
In the search for tidal structure in Galactic satellite systems, we have conducted a photometric survey over a 10 deg area centred on the Fornax dSph galaxy. The survey was made in two colours, and the resulting colourmagnitude data were used as a mask to select candidate Fornax RGB stars, thereby increasing the contrast of Fornax stars to background(More)
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