The Optical ChaMP Field ID (which specifies a unique optical pointing) is linked to a source
catalog for that field giving g, r, and i magnitudes and other
information.
Optical images are available as short integer format FITS files. The files are
quite large, generally between 80 and 100 Mbytes. For download of more than 4
images, please contact us. Additionally, GIF format are available for 'Quick Look'
purposes.