Hot-Pixel Analysis Summary for 970521n

Figure 3--- K Array "OR mask for 970521"
A table that lists the scan counts and their (X,Y) coordinates is here.

1) Pixel (12,202) is persistently hot (and has FREX>=6) on all 20 scans examined on 970521n, as plotted above in red. Therefore, the K-array AND mask for 970521n is:

3 12 202

Unfortunately, although this pixel does not appear hot in even a single Ks scan of nights 970418n or 970423n, it is "very hot" on 970521n. The number of frame extractions (FREX) in pixel (12,202) for the 20 scans examined on 970521n is listed here:

k013.fex.hot.tbl: 23
k014.fex.hot.tbl: 33
k015.fex.hot.tbl: 28
k016.fex.hot.tbl: 16
k017.fex.hot.tbl: 31
k018.fex.hot.tbl: 24
k019.fex.hot.tbl: 42
k020.fex.hot.tbl: 17
k021.fex.hot.tbl: 20
k022.fex.hot.tbl: 10
k048.fex.hot.tbl: 16
k049.fex.hot.tbl: 35
k050.fex.hot.tbl: 36
k051.fex.hot.tbl: 20
k064.fex.hot.tbl:  9
k065.fex.hot.tbl: 19
k066.fex.hot.tbl: 12
k067.fex.hot.tbl: 12
k068.fex.hot.tbl:  6
k069.fex.hot.tbl: 21

3 166 179
3 200 115
3 222 184

3) The joined K-array OR mask for nights 970423n and 970521n has a total of 64 pixels, with only the above 3 pixels in common.

4) The joined K-array OR mask of all 3 nights examined so far (970418, 970423, 970521) contains 144 unique pixels, with the following 12 pixels in common between any 2 nights:

3  49 219
3  56 236
3  99 176
3 143 246
3 154 253
3 159  65
3 166 179
3 174 177
3 190 232
3 193 213
3 200 115
3 222 184