[daip] VLA+Pt Calibration Problem

[Emma Rigby]

Hi Amy and Eric,

Thanks for your emails. I've tracked the problem down to the vlacalib task
I think. I was using the uvrange 90-180 which seems to not calibrate
antenna 29; if I use the full uvrange it is included. Are there any
guidelines as to the uvrange needed to stop the calibrator (3c286) from
being resolved when calibrating vla-pt data? (I also have another vla-pt
data set which works normally when calibrated using the range 90-180 which
leads me to think there's something odd about this one).

Thanks again for the help
Emma



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Emma Rigby
Institute for Astronomy     Email: eer at roe.ac.uk
University of Edinburgh     Tel  : +44 (0)131 668 8360
Royal Observatory           Fax  : +44 (0)131 668 8416
Blackford Hill
Edinburgh EH9 3HJ
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On Tue, 12 Jul 2005, Amy Mioduszewski wrote:

> Hi Emma,
>
> Along with what Eric said, look at your final CL table in detail to make
> sure all the calibration for antenna 29 isn't flagged, and then trace
> that back through the SN tables etc..  (Did you get any "failed
> solutions" when you ran CALIB?)  You can use PRTAB or I might just start
> with SNPLT so see if it plots anything and then use PRTAB to see what
> the actual numbers are.
>
> I've done some PT-link data reduction and it seemed to work normally,
> i.e., imaging is a bit of a pain, but initial calibration worked like
> the rest of the VLA.
>
> Cheers,
>
> Amy
>