[daip] Update on latest rotation seen in GOODS-N data

[Glenn Morrison]

Once again comparing the BIGGS HDF cat vs. our old cat where we did  
not applied the UVFIX to any of the data (all HDF data ABCD arrays).  
Note the rotation between these 2 cats and the "broader" histogram  
plot compared to our most recent cat.

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On Apr 3, 2008, at 3:28 PM, Glenn Morrison wrote:

> Mark,
>
> Here are the PLOTS for before UVFIX and after UVFIX was run on one  
> day's worth of 2006 A-array data. You'll see that the rotation was  
> fixed...
>
> However,  there might still be a hint of rotation in the UVFIXed  
> plot as the bottom right plot is still offset from zero by 0.1". In  
> comparing the BIGGS HDF reduction vs. our reduction of the HDF  
> Richards data only I don't see this small offset. But I do see this  
> small offset (will redo histogram with smaller binsize) on the last  
> plot comparing the BIGGS and ALL the HDF data (ABCD arrays).
>
> So, this appears to be (MAYBE) a second order rotation. Eric sent me  
> an email today that might be related to this other rotation. Not sure.
>
> --Glenn
>
> No rotation baseline comparison:
>
> BIGGS vs. our reduction of AR368 (Richards 1996 A-array) plus our  
> new B-array 2005 data AM825.
> Note the lack of rotation but also the bottom right histogram's peak  
> IS NOT offset from zero.
>
>
> <BIGG_HDFAR368A825.pdf>
>
>
>
>
>
>
> AFTER UVFIX-- no apparent rotation but the offset histogram's peak  
> if offset by ~0.1". I don't see this on the plot above. Is the  
> rotation still there???
>
> <BIGG_afterUVFIXHDF060402.pdf>
>
>
> BEFORE UVFIX .........
>
> <BIGG_beforeUVFIXHDF060402.pdf>
>
>
>
> PLOT OF ALL THE DATA, ABCD, BUT NOTE THAT THE SPREAD IS MUCH SMALLER  
> THAT IN THE UNFIXED PLOT ABOVE.
>
> <BIGG_ABCDFLATNV1001.pdf>
>
>