Northern H Median Flats & deviations about the median

Display range is 0.8-1.2 for flats, 0.0-0.1 for deviations. The third image is the difference between the canonical flat and the "super duper" grand canonical flat (computed from the average of periods 11-12) displayed at a -0.03 to +0.03 stretch. Note that a separate "super duper" grand canonical flat was computed from periods 08-10 and subtracted from periods 01-10, to separate out the H behavior before and after the new array was put into the telescope.

Hardware periods that had to be subdivided

01  970000 970802
02a 970903 970922*
02b 970927 971026
02c 971027 971224
03  971225 980411
04  980412 980604
05  980605 980918
06  980919 981015
07  981016 981020
08  981021 981117
09a 981118 990129
09b 990130 990427
10  990428 990720
11a 990721 991030
11b 991031 000126
11c 000127 000321*
11d 000323 000901
12  000902 050000

* followed by nights w/o flats; will need to 
decide which canonical these nights go with.

Original periods subdivided above:

02  970803 971224
09  981118 990427
11  990721 000901