I ran the flat-field correction analysis on all sets of photometric dither sequences. For each sequence, I flattened the images with the raw master flats, then measured the correction image as usual. I have not performed the complete correction residual measurement for each of these sequences yet. Instead, I have compared pairs of corrections measured for the same filters. Here is a list of the correction sequences we have available. There were some processing errors with some of these, so not all sequences have been analyzed yet:

  ID   filter   date of obs
  17     r        20080906 
  18     r        20080920 
  19     r        20081101 
  20     r        20081003 
  21     r        20081006 
  22     g        20080920 
  23     g        20081003 
  24     g        20081006 
  25     g        20081101 
  26     i        20080805 
  27     i        20080903 
  28     i        20080920 
  29     i        20081003 
  30     i        20081006 
  31     y        20080920 
  32     y        20081003 
  33     y        20081006

A more detailed summary of the comparison (plots and images) is given below, but the important summary is in the following list, which shows the residuals scatter between pairs of corrections for the different filters:

 g.23 - g.22 : 13.4 mmags
 g.23 - g.25 :  9.6 mmags
 i.28 - i.30 : 11.5 mmags
 r.18 - r.19 :  8.7 mmags
 r.18 - r.20 :  9.9 mmags
 r.18 - r.21 : 21.2 mmags
 y.31 - y.32 : 56.5 mmags
 y.31 - y.33 : 35.0 mmags

g-band Correction Images

g 22 2008.09.20 g 23 2008.10.03 g 25 2008.11.01
GPC1.g.22.jpg GPC1.g.23.jpg GPC1.g.25.jpg

g.23 - g.22

GPC1.g.23-GPC1.g.22.png GPC1.g.23-GPC1.g.22.jpg

g.23 - g.25

GPC1.g.23-GPC1.g.25.png GPC1.g.23-GPC1.g.25.jpg

r-band Correction Images

r 18 2008.09.20 r 19 2008.11.01 r 20 2008.10.03 r 21 2008.10.06
GPC1.r.18.jpg GPC1.r.19.jpg GPC1.r.20.jpg GPC1.r.21.jpg

r.18 - r.19

GPC1.r.18-GPC1.r.19.png GPC1.r.18-GPC1.r.19.jpg

r.18 - r.20

GPC1.r.18-GPC1.r.20.png GPC1.r.18-GPC1.r.20.jpg

r.18 - r.21

GPC1.r.18-GPC1.r.21.png GPC1.r.18-GPC1.r.21.jpg

i-band Correction Images

i 28 2008.09.20 i 30 2008.10.06
GPC1.i.28.jpg GPC1.i.30.jpg

i.28 - i.30

GPC1.i.28-GPC1.i.30.png GPC1.i.28-GPC1.i.30.jpg

y-band Correction Images

y 31 2008.09.20 y 32 2008.10.03 y 33 2008.10.06
GPC1.y.31.jpg GPC1.y.32.jpg GPC1.y.33.jpg

y.31 - y.32

GPC1.y.31-GPC1.y.32.png GPC1.y.31-GPC1.y.32.jpg

y.31 - y.33

GPC1.y.31-GPC1.y.33.png GPC1.y.31-GPC1.y.33.jpg