[Comm2011] Gain, linearity, readnoise etc. 2011-05-03

[Konrad Kuijken]

Hi guys,

now that the camera tilt appears to have been removed, it would be  
good to understand the image quality we have. Last night the seeing  
was very good, and I took some exposures (of one of the KiDS fields,  
ssssh) in ugri. Could you make the PSF quality plots for those?

Timestamps are 2011-05-03T07:06 to 08:41 inclusive.
Cheers
Koen


On May 4, 2011, at 2:03, helmich wrote:

> Hi Gijs,
>
> Thanks for the plot. What we've been mostly looking at here are  
> readnoise, gain, linearity and readnoise in electrons (readnoise *  
> gain) plots. Olaf and Christoph have cycled through several detector  
> settings to try to bring the readnoise in electrons down to below 5  
> electrons, while keeping saturation at 65k and maintaining linearity.
>
> So readnoise in electrons (the correct readnoise and gain template  
> that belong together must be used) and the linearity plots are  
> probably the most telling, and we're most interested in confirmation  
> on those.
>
> One type of plot I've not had much success in making here is Quick  
> Check trend plots. Those are also very desirable to have.
>
> Regards,
>
> Ewout
>
>
> On Wed, 04 May 2011 00:11:07 +0200, Gijs Verdoes Kleijn wrote:
>
> Hi Ewout,
>
> Please find attached the ReadNoise trend plot created in Groningen.
>
> Best wishes, Gijs
>
> Op 3-5-2011 17:02, helmich schreef:
> Hi,
>
> Attached are plots for gain, linearity, readnoise and readnoise	 in  
> electrons for today.
>
> Regards,
>
> Ewout
>
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