
These files were downloaded from the paper Cohen et al. 2003, AJ, 125, 2645

These are based on Landolt (1992)'s description of the Landolt (1983) 
photometric system which is the basis of the Landolt (1992) UBVRI standards,
plus the inclusion of a mean atmosphere model for CTIO. See the paper for
details.

These response curves are in *energy* units, as confirmed directly from
Martin Cohen (email to sj on 2006-Oct-03).

