Dark frames are taken rarely with 2x2 bin, low and high gain. Those
with low gain usually have neglible dark current in ADU. The
typical exposure time is 1800 sec. The FORS pipeline generates master
DARKs from input raw DARKs with master BIAS subtracted.
Dark current: is computed from the median master dark frame level
in ADU/hr/px and transformed into electrons by using the conversion
factor CONAD. More information can be found on
the plot tutorial page
Click on any of the plots to see a close-up version.
The latest date is indicated on top of the plot, data points belonging to that date are specially marked.
statistical averages are indicated by a solid line, and thresholds by broken lines
outliers are marked by a red asterisk. They are defined as data points outside the
"aliens" (= data points outside the plot Y limits) are marked by a red arrow (↑ or ↓)
you can download the data for each parameter set if the 'Data downloads' link shows up