[daip] GETJY

John Keck jwk at astro.columbia.edu
Mon Sep 11 16:00:23 EDT 2000


I was wondering if you might know what the cause of my problem is and how
I can correct it.

The problem is with GETJY on one of the several C-band observations I'm
calibrating.  It gives a flux that's about 20 times too high:

boheme> GETJY1: 1748-253        :  0   C     1   11.20408 +/-   7.62896
boheme> GETJY1:                              2    5.51208 +/-   3.54104

I'm pretty sure that I'm using the correct procedure because the flux of
the other phase calibrators of the observation aren't that far off:

boheme> GETJY1: 1923+210        :  0   A     1    1.38879 +/-   0.03630
boheme> GETJY1:                              2    1.48411 +/-   0.04156
boheme> GETJY1: 2013+340        :  0   T     1    0.92656 +/-   0.01559
boheme> GETJY1:                              2    0.92186 +/-   0.01529

The observing log (AM447, 94Feb17), says that a couple of the antennas
were having problems, and that there was some shadowing that corrupted the
data, so perhaps that is the cause.  I can't seem to find anything in the
Cookbook about shadowing.  What should I do to correct it?

Thanks,

John Keck





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