[Comm2011] illuminationcorrections workplan Groningen

[Konrad Kuijken]

The striking pattern (the cross?) is the vignetting by the Tbars that  
cover the edges of the four glass segments. V will have the same  
property.
K

On May 6, 2011, at 21:42, Gijs Verdoes Kleijn wrote:

> Hi Ewout,
>
> I have pngs of the domeflats which I am using to make illumination  
> corrections: http://wiki.astro-wise.org/projects:omegacam:commissioning:flatfields
> Particularly striking pattern in JohnsonB is attached. Rest not  
> attached, fear the 1MB each is too large.
> Cheers, Gijs
>
> Op 6-5-2011 12:36, helmich schreef:
>> Hi Gijs,
>>
>> This should be helpful, especially the focussing on masteflats from  
>> only
>> domeflats. Note that the plots I made so far are made from  
>> observations one
>> day later than you indicate here.
>>
>> Dates like 2011-05-04-0[3-10].
>>
>> There are many zeropoint templates that night, but I think the  
>> monitoring
>> pointings (to polar field ) are taken with Zeropoint template,  
>> rather than
>> Monitoring template.
>>
>> Ewout
>>
>>
>> On Fri, 06 May 2011 10:50:38 +0200, Gijs Verdoes Kleijn
>> <verdoes at astro.rug.nl>  wrote:
>>> Hi Ewout,
>>>
>>> We can process the following standard field observations:
>>> ('OCAM_B_JOHN', datetime.datetime(2011, 5, 3, 5, 48, 9))
>>> ('OCAM_r_SDSS', datetime.datetime(2011, 5, 3, 5, 21, 53))
>>> ('OCAM_u_SDSS', datetime.datetime(2011, 5, 3, 5, 29, 22))
>>> ('OCAM_u_g_r_i_SDSS', datetime.datetime(2011, 5, 3, 5, 37, 42))
>>> ('OCAM_g_SDSS', datetime.datetime(2011, 5, 3, 5, 34, 4))
>>> ('OCAM_z_SDSS', datetime.datetime(2011, 5, 3, 5, 42, 56))
>>> ('OCAM_V_JOHN', datetime.datetime(2011, 5, 3, 5, 51, 46))
>>> ('OCAM_i_SDSS', datetime.datetime(2011, 5, 3, 5, 24, 56))
>>> Our plan is to process up to illuminationcorrections for these  
>>> fields
>>> using only domeflats first.
>>> Please let us know if there is higher priority work we can do for  
>>> your
>>> illuminationcorrection analysis.
>>>
>>> Best wishes, Gijs
>>>
>>>
>>> --
>>> --------------------------------------------------------------------
>>> |dr Gijs Verdoes Kleijn         |   astronomer                     |
>>> |e-mail: verdoes at astro.rug.nl   |   OmegaCEN / Kapteyn Institute / |
>>> |www: www.astro.rug.nl/~verdoes |   Target                         |
>>> |tel: +31-50-3638326            |   University of Groningen        |
>>> |mobile: +31-654658050          |   postal address:                |
>>> |                               |   Kapteyn Astronomical Institute |
>>> |                               |   Postbus 800, 9700 AV, Groningen|
>>> |                               |   The Netherlands                |
>>> --------------------------------------------------------------------
>>>
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