[KIDS] ccd Crosstalk

[Ewout M. Helmich]

Hi Lino,

There is a difference between measuring the crosstalk and correcting for 
it. Two things will likely happen:

1) Your example would produce outliers in the fit to measure crosstalk 
for all "overlapping" pixels (this in both plots #95 -> #96 and #96 -> 
#95). Presumably the overall fits will not be affected much because 
clipping is done before the fit. There will be other (and more) pixels 
with e.g. value 40000ADU that fall on the background in the other CCD 
rather than another star.

2) Saturated pixels in #96 will be affected by crosstalk from #95, and 
therefore you get a comparable issue as happens on the low end when 
negative crosstalk is larger than the bias level: you get a dark spot on 
top of the saturated star in #96.

Regards,
Ewout

On 05/08/2012 11:51 AM, agrado wrote:
> Dear Ewout,
>
> There is something about crosstalk that it is not clear to me. Let suppose
> that on ccd95 you have a source at a certain position and on ccd96 you have
> another source at the same position. How will be corrected the crosstalk in
> this case?
>
> Thanks
>
> Lino
>