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

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Program Information for 2009A-0041


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

CoI: Patrick J McCarthy, Carnegie Observatories
CoI: Alan Dressler, Carnegie Observatories
CoI: John S Mulchaey, Carnegie Observatories
CoI: Steve Shectman, Carnegie Observatories
CoI: Augustus Oemler, Carnegie Observatories
CoI: Haojing Yan, Ohio State U.

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 $\sim 500\, 000$ galaxies over 15 degs$^2$ in three fields over the next three years. Our targets are selected at .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.

Program Type: Survey

Scheduled Nights:
Run 1 (2009B):  KP-4m/NEWFIRM -- 10.5n on Sep 25 - Oct 01 2009, Nov 06 - Nov 09 2009
Run 2 (2010B):  CT-4m/NEWFIRM -- 16n on Sep 07 - Sep 11 2010, Nov 18 - Nov 23 2010, Dec 14 - Dec 18 2010
Run 2 (2011B):  CT-4m/NEWFIRM -- 14n on Sep 16 - Sep 29 2011


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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