[daip] [Fwd: About DBCON]

[Jim Ulvestad]

Can somebody help with this?  They appear to have written
to me because I wrote the old explain file 25 years ago!

Thanks,

Jim

---------------------------- Original Message ----------------------------
Subject: About DBCON
From:    "Miguel Angel Perez-Torres" <torres at iaa.es>
Date:    Mon, March 19, 2007 5:34 am
To:      "Jim Ulvestad" <julvesta at aoc.nrao.edu>
Cc:      "Antxon Alberdi Odriozola" <antxon at iaa.es>
--------------------------------------------------------------------------

Dear Jim,

We write you as documentor of program DBCON within AIPS.

We are trying to combine several UV datasets from consecutive VLA-A
configurations
on NGC 7469, using DBCON.
The problem is that the same antenna has different numbers, and even
slightly different coordinates, in the antenna files for each epoch.
We have tried with different options of adverb DOARRAY within DBCON,
without success.

The uv spacings are correct (UVPLT shows that the uv-coverage
corresponds to the
addition of the files), but not the amplitudes. UVPLT shows
amplitudes of hundreds of kiloJansky for a number of baselines, while
for the rest, we get the correct flux density
(a few tens of mJy).

We would appreciate your comments and advices on how to combine the
data.
Thanks in advance,
Miguel

Dr. Miguel-Angel Perez-Torres                  http://www.iaa.es/~torres
Senior Postdoctoral Researcher                  Office: +34-958 23 05 32
                                                Skype: ma_pereztorres
Instituto de Astrofisica de Andalucía          Fax:    +34-958 81 45 30
C/ Camino Bajo de Huetor, 50                   E-18008 Granada, Spain