NOAO >   Observing Info >   Approved Programs >   2009A-0041

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Proposal Information for 2009A-0041


PI: Daniel Kelson, Carnegie Observatories, kelson@ociw.edu
Address: 813 Santa Barbara Street, Pasadena, CA 91101, USA

CoI: Pat McCarthy, Carnegie Observatories
CoI: Alan Dressler, Carnegie Observatories
CoI: John Mulchaey, Carnegie Observatories
CoI: Steve Shectman, Carnegie Observatories
CoI: Augustus Oemler, Carnegie Observatories
CoI: Haojing Yan, The Ohio State University

Title: The Carnegie Spitzer IMACS Survey

Abstract: We request time with NEWFIRM to complete our wide-area deep spectrophotometric survey of galaxy and structure evolution from z=1.5 to the present. Combining the NEWFIRM photometry with low- dispersion spectroscopy with the IMACS spectrograph on the 6.5m Magellan telescope we will obtain redshifts, spectral classifications, and emission-line strengths for ~ 500 000 galaxies over 15 degs^2 in three fields over the next three years. Our targets are selected at 3.6(mu) m from Spitzer/IRAC legacy fields. The J, H, and K_s imaging to modest depths is critical for reaching the redshift precision required to characterize local galaxy density and the role it plays in history of star formation and the growth of stellar mass. NEWFIRM is the only instrument in the US system that can provide the necessary near- IR coverage. We aim to reach J=21.5 mag, H=20.5 mag, and K_s=20.0 mag (Vega, D=3'', 10-sigma), allowing us to retain better than 1% redshift precision to M^*/2 at z=1 and for M^* to z=1.5. Magellan time has already been allocated to this program, and we have been awarded NEWFIRM time in two previous semesters.


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



NOAO >   Observing Info >   Approved Programs >   2009A-0041

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