[Comm2011] OCAM2 daily log day 3

[Jeffrey Bout]

> -is the 3x3 grid of 5-point dithers as you expect?

The CRVAL pointings of the SA113 3x3 grid 5point dithers are exactly
on the decimal plate system (the central one of each 5 point dither).
So YES

Jeffrey

2011/6/9 Gijs Verdoes Kleijn <verdoes at astro.rug.nl>:
> Dear Jeffrey, Ewout, Gert, John,
>
> Thanks John for the nightlog.
> Jeffrey, could you inspect the 3x3 grid data? Answers we are looking for
> in order of priority:
> -is the 3x3 grid of 5-point dithers as you expect?
> and then:
> -what is the astrometric quality of the coadd: talk to Kor and Erik Deul
> how to do this. And John, you might have advice how to proceed.
> and finally:
> -non-photomeric indeed?: come talk to Ewout/me if needed.
>
> Ewout+Gert is looking into the 32 offsets. I propose Gert takes the lead
> in this so Ewout can concentrate on the polar field analysis.
> Questions here are:
> -32 positionings in order?
> -exptime ok: enough standard stars.
> -should data be repeated: data useful at all given non-photometric
> conditions?
>
> Best wishes, Gijs
>
> John P. McFarland wrote:
>> Hi All,
>>
>> Tonight was quite a productive night.  Unfortunately the Toelner is
>> still not responding, so no new quick checks (despite the 51 test
>> quick checks) or 4-angle dome flats.  The problem will hopefully be
>> solved today.  Andrea, Koen, and Dietrich arrived tonight and worked
>> until around midnight when I took over.
>>
>> The conditions were relatively good with mostly excellent 0.5-0.7
>> arcsec seeing, but somewhat poor transparency.  It is difficult to say
>> which observations will be photometrically useful.  Several polar
>> field observations were obtained, so the variable conditions should be
>> seen there as well.  Complete 32 CCD offset observations in z and g
>> were obtained for SA107.  These are almost perfect compared to the
>> last nights' sets, but there was still some very light cirrus visible
>> on the all-sky cam during these.  Also, please check the 32 CCDs
>> exposures overlap for the center of the field.  The center was placed
>> on all the CCDs in the order that they are stored in the RawFitsData.
>>
>> A donut template was attempted for the VST people (requested by Koen),
>> but failed due to some template keyword error (Andrea and Koen will
>> have to investigate this).  Nonetheless, the focus offsets were done
>> and the required data secured.
>>
>> Following this, the night was wrapped up with a 3x3 grid from the
>> newest plate system centered on about the SA113 field, taken with
>> dither,N=5 in r for 60 seconds per exposure.  Please check these out
>> to make sure all the offsets were done correctly.
>>
>> Cheers,
>>
>>
>> -=John
>> ------------------------------------------------------------------------
>>
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>
> --
> --------------------------------------------------------------------
> |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 |
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> |                               |   The Netherlands                |
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