| parameter |
procedure |
applicable |
actual values |
plot* |
| efficiency E (ADU/sec) |
median/exposure time |
master |
10000 (BVR), 1000 (U) |
screen flat 1a,b |
| photon noise sph(ADU) |
difference of 2 raw files, s in 100x100 window |
raw |
100-150 ADU @ 20000 ADU |
screen flat 2a |
| fixed-pattern noise sfp (ADU) |
total s in 100x100 window, subtract photon noise (squared under root) |
raw/master |
100-150 ADU @ 20000 ADU |
screen flat 2b |
| fractional port difference sAB (%) |
fractional s across ports A and B |
raw/master,
4 port only |
20 - 25 % |
screen flat 3 |
| photon noise vs. flux |
plot 2a vs. median |
raw |
scale as 0.5%*(signal/20000)1/2 |
screen flat 4a |
| fixed-pattern noise vs. flux |
plot 2b vs. median, per filter |
raw/master |
scale as 0.5%*(signal/20000) |
screen flat 4b-f |
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