Now showing items 1-20 of 211

• #### Extracting Source Parameters from Gaussian Fits to Two-Particle Correlations ﻿

Using a quadratic saddle-point approximation, we show how information about a particle-emitting source can be extracted from gaussian fits to two-particle correlation data. Although the formalism is completely general, ...
• #### First results from the UBC etch-alignment mosaic CCD ﻿

First imaging results are obtained with a new CCD mosaic prototype (3K x 3k, 15 \mu m pixels). The CCDs are aligned using an etched socket alignment technique. Three different measurements of the alignment are made using ...
• #### B1933+503, a dusty radio quasar at z>2: implications for blank field sub-mm surveys? ﻿

We present a detailed mm-wave and optical study of the gravitational lens system B1933+503, discovered by Sykes et al.(1998) in the radio. This object is probably the most complex lens system known, with 10 lensed components ...
• #### Submillimeter Observations of the Ultraluminous BAL Quasar APM 08279+5255 ﻿

With an inferred bolometric luminosity of $5\times10^{15}{\rm \lsun}$, the recently identified z=3.87, broad absorption line quasar APM 08279+5255 is apparently the most luminous object currently known. As half of its ...
• #### Using SCUBA to place upper limits on arcsecond scale CMB anisotropies at 850 microns ﻿

The SCUBA instrument on the James Clerk Maxwell Telescope has already had an impact on cosmology by detecting relatively large numbers of dusty galaxies at high redshift. Apart from identifying well-detected sources, such ...
• #### First detections of FIRBACK sources with SCUBA ﻿

The FIRBACK (Far InfraRed BACKground) survey represents the deepest extensive 170 micron images obtained by the ISO satellite. The sources detected comprise about 10% of the Cosmic IR Background (CIB) seen by COBE, and, ...
• #### Adaptive optics near-IR imaging of NGC2992 - unveiling core structures related to radio figure-8 loops ﻿

We present near-IR adaptive optics, VLA radio and HST optical imaging of the nearby Seyfert galaxy NGC2992. Spiral structure and an extension to the West are traced down to the core region at the limiting resolution of our ...
• #### Radio galaxy selected clusters at high redshift and associated ERO overdensities ﻿

Galaxy clusters at high redshift present a superb opportunity to study galaxy evolution, with large galaxy samples at fixed distances. Several lines of evidence point towards large formation redshifts and passive evolution ...
• #### SCUBA observations of Hawaii 167 ﻿

We present the first submillimetre observations of the z=2.36 broad absorption line system Hawaii 167. Our observations confirm the hypothesis that Hawaii 167 contains a massive quantity of dust, the optical depth of which ...
• #### The nature of the bright submillimeter galaxy population: a radio pre-selected sample with I>25 ﻿

Deep submillimetre surveys have successfully detected distant, star-forming galaxies, enshrouded in vast quantities of dust and which emit most of their energy at far infrared wavelengths. These luminous galaxies are an ...
• #### Submillimetre sources in rich cluster fields - source counts, redshift estimates, and cooling flow limits ﻿

Recent submillimetre surveys have revealed a population of dusty, high redshift sources of great cosmological significance for understanding dust-enshrouded star formation in distant galaxies, and for determining the origin ...
• #### The origin of [Fe II] emission in NGC 4151 ﻿

The centre of NGC 4151 has been observed in the J-band with the SMIRFS integral field unit (IFU) on the UK Infrared Telescope. A map of [Fe II] emission is derived, and compared with the distributions of the optical narrow ...
• #### A SCUBA Scanmap of the Hubble Deep Field: Measuring the bright end of the sub-mm source counts ﻿

Using the 850 micron SCUBA camera on the JCMT and a scanning technique different from other sub-mm surveys, we have obtained a 125 square arcminute map centered on the Hubble Deep Field. The one-sigma sensitivity to point ...
• #### Near-IR adaptive optics imaging of nuclear spiral structure in the Seyfert galaxy, NGC3227 ﻿

We present high spatial resolution, near-IR images in J, H, K of the nucleus of NGC3227, obtained with the Adaptive Optics bonnette on CFHT. The ~0.15 arcsec (17pc) resolution allows structures to be probed in the core ...
• #### A search for the submillimetre counterparts to Lyman break galaxies ﻿

We have carried out targetted sub-mm observations as part of a programme to explore the connection between the rest-frame UV and far-IR properties of star-forming galaxies at high redshift, which is currently poorly ...
• #### Understanding the nature of the optically faint radio sources and their connection to the submillimeter population ﻿

We present a sample of 43 submillimeter sources detected (at >3 sigma), drawn from our program to follow-up optically faint radio sources with SCUBA. These sources already have associated radio and in many cases optical ...
• #### Optically faint counterparts to the ISO-FIRBACK 170 micron population: the discovery of cold, luminous galaxies at high redshift ﻿

We present Keck spectroscopy and UKIRT near-IR imaging observations of two 170micron-selected sources from the ISO-FIRBACK survey which have faint counterparts in the optical, and r-K~5. Both sources were expected to lie ...
• #### The effect of lensing on the identification of bright SCUBA galaxies ﻿

Spectroscopic surveys of luminous submillimetre-selected sources have uncovered optically-bright galaxies at z&lt;1 close to the positions of several submillimetre (submm) sources. Naive statistical analyses suggest that ...
• #### Westphal-MMD11: An interacting, submillimeter luminous Lyman break galaxy ﻿

We present new Hubble Space Telescope, high-resolution optical imaging of the submm luminous Lyman-break galaxy, Westphal-MMD11, an interacting starburst at z=2.979. The new imaging data, in conjunction with re-analysis ...
• #### The Hubble Deep Field North SCUBA Super-map - I. Submillimetre maps, sources and number counts ﻿

We investigate the emission of submillimetre-wave radiation from galaxies in a 165 arcmin<SUP>2</SUP> region surrounding the Hubble Deep Field North. The data were obtained from dedicated observing runs from our group and ...