[Comm2011] Some calibration results

[helmich]

Volgens Koen heeft Fabrice Christen in zijn proefschrift deze patronen
wellicht al beschreven. Wordt waarschijnlijk geproduceerd in de coating van
de CCDs.

Ewout

On Wed, 30 Mar 2011 18:55:17 +0200, "G. Sikkema" <sikkema at astro.rug.nl>
wrote:
> I note that
> -the Linearity in the plot seems completely chaotic for chip #82
> -Linearity only occurs for counts below <~ 35000
> 
> Is there anything known about all these (regular) patterns in the
> (Raw)DomeFlats?
> 
> cheers and keep up the good work,
> Gert S.
> 
> 
> helmich wrote:
>>
>> See attachments.
>>
>> Note that the rawbias level plot has individual scaling (I couldn't
>> get the margins right, but if you zoom in it's still readable).  It is
>> for one 24h period. Where a scientific notation shows up above the
>> plot, the whole range is within 1 ADU.
>>
>> The readnoise plot clearly shows the jump after the FIERA filtering
>> was adjusted.
>>
>> Linearity is of only one Gain template.
>>
>> Ewout
>>
>>
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> 
> 
> --
> dr. Gert Sikkema
> 
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