[evlatests] Not all bad news ...

[Rick Perley]

    Although imaging Cygnus A has been disappointing (so far), imaging 
of its nearby calibrator is quite superb. 

    After self-calibration and simple clipping of discrepant data 
points, images of J2007+4029 gives apparently noise-limited images with 
1, 16, and 56 channels co-added, and with 1 or 2 IFpairs included. 

    There are about 25 observations, each of about 2 minutes duration, 
with 26 antennas.  The lowest noise is 14 microJy/beam, providing about 
275,000:1 DR.  This is with 'uniform' weighting.  Use of natural 
weighting made no difference in rms, but shows some 'Cygnus A' short 
spacing flux appearing (Cyg A is 2.5 degrees away). 

    I'll work out whether we are close to the thermal noise tomorrow.  
The (uniform weighted) maps certainly appear noise-limited.