Results from the First Look Survey (FLS)

``The Evolution of Dusty Star Formation and Stellar Mass Assembly in Clusters: Results from the IRAC 3.6, 4.5, 5.8 and 8.0 micron Cluster Luminosity Functions''
Muzzin A., Wilson G., Lacy M., Yee H. K. C & Stanford S. A. 2008, ApJ, 686, 966

This paper resulted from a pilot survey we did in the 4 square degree Spitzer First Look Survey, using R-[3.6] color to detect clusters. It was the first paper to study the 5.8 and 8.0 IRAC cluster luminosity functions (LFs).

We presented a catalog of 99 clusters and groups at 0.1 < z < 1.3 (29 have at least one spectroscopically confirmed member). We showed that the R-[3.6] color provides very accurate photometric redshifts (Deltaz = 0.04 at z < 1). We also computed the two shorter wavelength channel IRAC LFs, which trace stellar mass at these redshifts. We found that the evolution in Mstar (the knee of the Schechter function) was consistent with passive evolution.

``The Infrared Array Camera Component of the Spitzer Space Telescope Extragalactic First Look Survey''
Lacy, M., Wilson, G., Masci, F., Storrie-Lombardi, L. J., Appleton, P. N., Armus, L., Chapman, S. C., Choi, P. I., Fadda, D., Fang, F., Frayer, D. T., Heinrichsen, I., Helou, G., Im, M., Laine, S., Marleau, F. R., Shupe, D. L., Soifer, B. T., Squires, G. K., Surace, J., Teplitz, H. I., Yan, L., 2005, ApJ, 161, 41L

This paper describes the IRAC FLS data reduction.

The SpARCS observations are deeper, and the clusters are detected using a "redder" z'-[3.6] filter combination, allowing SpARCS to detect clusters to higher redshift.