These are the values obtained for gain and readout noise:
UpLeft Quad  Downleft Quad  UpRight Quad  Down Right Quad  Average  
Gain (e per ADU)  4.18  4.25  4.16  4.15  4.18 
Readout noise (e)  21.63  22.95  22.48  20.92  21.99 
These are the parameter obtained with polyfit of IRAF to calculate the parameters of the fitting for each graph (in all the cases the correlation was over 0.999). The polynomial used for the fitting is of third order:
Statistic for upleft quadrant:
























Statictic for downleft quadrant:
























Statistic for upright quadrant:
























Statictic for downright quadrant:
























Statictic for whole frame:
























You can see that the median is more or less constant, independ of the integration time. This fact is different to the statistic done during Feb99, when the median depended clearly with the exposure time. The shape of the curve is almost but much smaller. More studies have to be done to clearyfy this point.
Here
you can see the results obtained during Feb99.