[daip] VLBI question

[Deborah Haarsma]

I have a question about VLBA data calibration in AIPS.

Background: I am reducing data from 1997, which contains the phased
VLA and the GB 140' as well as the VLBA.  (No, it hasn't taken me four
years to reduce it, I've been interupted by other projects & teaching
for long stretches.)  The observation is of gravitational lens
0957+561, and we did phase referencing.  The field contains two
sources (several mJy each) at positions A and B, and (hopefully) a
faint source at position G.  Correlation was done at all three
positions.  The data set I received from the correlator for the A
position contained all the data for the calibrator sources (OJ287,
3C84, etc.) as well as the target (0957A) and the phase reference
calibrator (J1035).  I successfully did the calibration and
phase-referencing, and 0957A was strong enough to fringe-fit
itself after phase-referencing.  I produced a good map of 0957A.

The problem: The data sets for B and G only contained 0957 and J1035,
with no other calibrators.  So I need to somehow get the amplitude
calibration information from the A data set into B and G.  I tried
simply copying (with TACOP) the correct SN or CL tables from A to B,
but the source names get mixed up in the process (presumably because
the SU tables have different entries for A and for B).  How should I
go about transferring the calibration to the B and G data sets?

Thanks!

Debbie

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Deborah B. Haarsma                  
office:  SB 175
mail:    Physics & Astronomy Department
         Calvin College
         3201 Burton Street SE
         Grand Rapids, MI 49546
email:   dhaarsma at calvin.edu
web:     http://www.calvin.edu/~dhaarsma
phone:   616-957-6340  
fax:     616-957-6501
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