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New UltraCool and Halo White Dwarf Candidates in SDSS Stripe 82
S. Vidrih, D. M. Bramich, P. C. Hewett +16
A 2.5 x 100 degree region along the celestial equator (Stripe 82) has been imaged repeatedly from 1998 to 2005 by the Sloan Digital Sky Survey. A new catalogue of ~4 million light-…
Direct Observational Test Rules Out Small MgII Absorbers
Andrew Pontzen, Paul Hewett, Robert Carswell +1
Recent observations suggest the incidence of strong intervening MgII absorption systems along the line-of-sight to gamma ray burst (GRB) afterglows is significantly higher than exp…
A very cool brown dwarf in UKIDSS DR1
S. J. Warren, D. J. Mortlock, S. K. Leggett +21
(abridged) We report the discovery of a very cool brown dwarf, ULAS J003402.77-005206.7 (ULAS J0034-00), identified in UKIDSS DR1. We provide optical, near-infrared, and mid-infrar…
The Luminosity Function of the Milky Way Satellites
S. Koposov, V. Belokurov, N. W. Evans +8
We quantify the detectability of stellar Milky Way satellites in the Sloan Digital Sky Survey (SDSS) Data Release 5. We show that the effective search volumes for the recently disc…
The host galaxies of strong CaII QSO absorption systems at z<0.5
Berkeley J. Zych, Michael T. Murphy, Max Pettini +3
We present new imaging and spectroscopic observations of the fields of five QSOs with very strong intervening CaII absorption systems at redshifts z<0.5 selected from the Sloan Dig…
K-band Imaging of strong CaII-absorber host galaxies at z~1
Paul Hewett, Vivienne Wild
We present K-band imaging of fields around 30 strong CaII absorption line systems, at 0.7<z<1.1, three of which are confirmed Damped Lyman-alpha systems. A significant excess of ga…