File name structure is:

deepdrill_[field]_[versiondate]_[channel]_mosaic[_type].fits

where:

field = cdfs, es1, or xmm
versiondate is the date for this version of the images
channel is the channel number, ch1 = 3.6 microns, ch2 = 4.5 microns
type = nothing for science, unc for uncertainty, cov for coverage.

The starmask file applies to both bands and omits the channel and mosaic 
parts of the file name.