NOAO >   Observing Info >   Approved Programs >   2006B-0328

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Proposal Information for 2006B-0328


PI: Prof. Karl Glazebrook, Johns Hopkins University, kgb@pha.jhu.edu
Address: Physics Department, 3400 North Charles Street, Baltimore, MD 21218, USA

CoI: Dr. Kuenley Chiu, Johns Hopkins Univ. / Univ. of Exeter
CoI: Dr. Andrew Bunker, University of Exeter

Title: The First z>6.4 Quasars and Y Dwarfs from UKIDSS

Abstract: The now operational UKIRT Deep Infrared Sky Survey (UKDISS) has opened a new window of possibility for the discovery and characterization of extremely red objects such as quasars beyond z~6.4 and the extreme class of ``Y'' brown dwarfs. Surveying significant areas approximately four magnitudes deeper than 2MASS, and employing the novel Y filter, UKIDSS probes a new parameter space and presents several observing opportunities that we propose to combine into a single efficient followup search. Drawing on our past success in finding L and T dwarfs, as well as high-redshift quasars, we have created new selection techniques, and will carry out a coordinated imaging and spectroscopic campaign to identify such interesting objects in merged SDSS-UKIDSS data. We present selection techniques and sample candidates/sky densities/magnitudes based on the UKIDSS early data, which will then be applied to the next large data release, scheduled to occur in July 2006 and covering the range RA=23-4 hours with ~150 square degrees.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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