[daip] multi-channel continuum calibration
Eric Greisen
egreisen at nrao.edu
Mon Aug 8 17:13:53 EDT 2011
Farhad Zadeh wrote:
> 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
>
>
> _______________________________________________
> Daip mailing list
> Daip at listmgr.cv.nrao.edu
> http://listmgr.cv.nrao.edu/mailman/listinfo/daip
How did you end up with 2 IFs? This is only 2X128 MHz.
Eric
More information about the Daip
mailing list