Use of these data must be accompanied by citation of the following paper and acknowledgment:

• The Spitzer Space Telescope First-Look Survey. II. KPNO MOSAIC-1 R-band Images and Source Catalogs, Fadda, D., et al., 2004, AJ, 128, 1.
• The National Optical Astronomy Observatory (NOAO) is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under cooperative agreement with the National Science Foundation.

The data can be accessed at the First Look Survey page.