PT Filters
The u, g, r, and i PT filters were replaced during the August 2001 shutdown.
These data are for the old filters and were obtained to help specify the new
filters.
Fits files for download. Try right-click, then save-as:
[  g' ] 
[  r' ] 
[  i' ].
The blue edge of the g' curve is the spectrometer cutoff,
not the filter.
These are not the specific data
used to determine numbers in Fukugita's summary
report (above) but simply the sum of all data obtained.
Added note about filter replacement November 2, 2001 - au
February 16, 2001