[daip] multi-channel continuum calibration

[Farhad Zadeh]

Hi Eric,
We recently observed Sgr A* using EVLA at 7mm in the A-array using
2x1Ghz band as the headers below show.
We combined the data using avspc and then proceeded  calibrating  the data 
following self-cal (P and A&P)
Turned out the imaging quality is really bad and can't see any extended 
emission except Sgr A*.

I am suspecting that because of the delay across the
band and the consequent poor  deconvolution that we are getting
terrible images. Any suggestions as to we should proceed properly
(step-by-step including  self-cal on channel data above).

Many thanks,
Farhad
AIPS 1: Image=MULTI     (UV)         Filename=DAY1-COR    .TYAPL .   1
AIPS 1: Telescope=EVLA               Receiver=EVLA
AIPS 1: Observer=Dr. Farh            User #=  777
AIPS 1: Observ. date=09-JUL-2011     Map date=05-AUG-2011
AIPS 1: # visibilities   3474549     Sort order  TB
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  BASELINE  TIME1
AIPS 1:            SOURCE  INTTIM
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: STOKES       4  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: FREQ        64   4.1436000E+10       1.00  2.0000000E+06    0.00
AIPS 1: IF           2   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: RA           1    00 00 00.000       1.00       3600.000    0.00
AIPS 1: DEC          1    00 00 00.000       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00