In principle, dark galaxies in the dwarf-galaxy mass range may be detectable through additional, small-scale image splitting of quasars that are already known to be multiply-imaged on arcsecond scales. Here, we derive the image separations expected for dark galaxies with density profiles favoured by recent N-body simulations. The results are

We report on the status of the Canarias InfraRed Camera Experiment (CIRCE), a near-infrared visitor instrument for the 10.4 meter Gran Telescopio Canarias (GTC). Besides functioning as a 1-2.5 micron imager with a 3.4×3.4 arcminute field-of-view and 0.10 arsecond pixels, CIRCE will have the capacity for low and moderate resolution grism

Not Available

We present a study of the radial distribution of RR Lyrae variables, which present a range of photometric and pulsational properties, in the dwarf spheroidal galaxy Tucana. We find that the fainter RR Lyrae stars, having a shorter period, are more centrally concentrated than the more luminous, longer period RR Lyrae variables. Through comparison

Coordinates, redshifts, SDSS (ugriz) and 2MASS (JHK) photometry, IRAC and MIPS fluxes for the 278 SWIRE/SDSS quasars in the SWIRE EN1, EN2 and Lockman fields, ordered by RA. (2 data files).

Coordinates, redshifts, SDSS (ugriz) and 2MASS (JHK) photometry, IRAC and MIPS fluxes for the 278 SWIRE/SDSS quasars in the SWIRE EN1, EN2 and Lockman fields, ordered by RA. (2 data files).