NOAO >   Observing Info >   Approved Programs >   2005A-0450

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Proposal Information for 2005A-0450


PI: Richard Green, NOAO, rgreen@noao.edu
Address: KPNO, 950 N. Cherry Ave, Tucson, AZ 85719, United States

CoI: Scott Croom, Anglo-Australian Observatory
CoI: Arjun Dey, NOAO
CoI: Dara Norman, NOAO/CTIO
CoI: Kate Brand, NOAO
CoI: Steve Warren, Imperial College
CoI: Pat Hall, York U.
CoI: Michael Brown, NOAO
CoI: Buell Jannuzi, NOAO
CoI: Paul Smith, Steward Observatory
CoI: Malcolm Smith, NOAO/CTIO
CoI: Glenn Tiede, Bowling Green State U.

Title: A Deep Wide-Field Infrared Survey for QSOs

Abstract: We propose to continue the first deep wide-field infrared-selected survey for QSOs. The purpose is to determine the contribution of QSOs to the universal energy budget over the optical-infrared window as a function of cosmic time. A fuller census of accreting objects must include the impact of dust in the host galaxy, in the circumnuclear torus, and in intervening absorbers. We are using the unique optical and IR deep imaging data provided in the Bootes field of the NOAO Deep Wide-Field Survey (filters used: B_w, R, I, K). We request 4 nights with MARS in order to obtain spectroscopy of the reddest objects not yet successfully identified in previous multi-fiber reconnaissance. By using the K-excess (KX) method we will select a complete sample of QSOs, flux limited in the K-band, that is minimally affected by dust extinction or by intrinsically red continuum slopes. These data will enable progress toward our survey aims, namely, to i) compare the completeness of UVX and KX samples, ii) detect a complete sample of QSOs in the redshift desert 2.5<z<3.2, iii) determine the fraction of red and reddened QSOs, iv) measure the K-band luminosity function of QSOs to z=4.


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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