[daip] NVSS data cube

[Eric Greisen]

Dharam Vir Lal wrote:
> help!
> 
> i have NVSS Stokes IQU data cube (please see IMHEAD output below) and i
> want to split these into three individual images so that i use COMB task
> to make polarisation images.  what AIPS task will do this for me?
> 
> kind regards, Dharam.
> 
> ----------------------------------------------------
> 
> AIPS 1: Got(1)   disk= 2  user= 164   type=MA   A2465_1_4.IQU.1
> AIPS 1: Image=No_Name   (MA)         Filename=A2465_1_4   .IQU   .   1
> AIPS 1: Telescope=VLA                Receiver=L-BAND
> AIPS 1: Observer=NVSS GRP            User #=  164
> AIPS 1: Observ. date=15-NOV-1993     Map date=17-AUG-2010
> AIPS 1: Minimum=-1.99401448E-03      Maximum= 3.12409438E-02 JY/BEAM
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
> AIPS 1: RA---SIN    61    22 39 30.200      31.00        -15.000    0.00
> AIPS 1: DEC--SIN    61   -05 44 21.000      31.00         15.000    0.00
> AIPS 1: STOKES       3   1.0000000E+00       1.00  1.0000000E+00    0.00
> AIPS 1: FREQ         1   1.4000000E+09       1.00  1.0000000E+08    0.00
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Coordinate equinox 2000.00
> AIPS 1: Map type=NORMAL              Number of iterations=       1
> AIPS 1: Conv size=  45.00 X  45.00   Position angle=   0.00
> AIPS 1: Observed RA   22 40 00.000    DEC -04 00 00.00
> AIPS 1: Maximum version number of extension files of type HI is   1

I believe that PCNTR can plot this cube directly.  If you want to break 
it into pieces, use SUBIM to select the individual planes, then COMB to
construct total polarization and polarization angle images.

Eric Greisen