[daip] UNKNOWN POL message

[Brian Kent]

Hi Eric,

IMHEAD output below:

>imh
AIPS 1: Image=MULTI     (UV)         Filename=20061124    .LINE  .   1
AIPS 1: Telescope=VLA                Receiver=VLA
AIPS 1: Observer=AK641               User #= 1138
AIPS 1: Observ. date=24-NOV-2006     Map date=31-MAR-2007
AIPS 1: # visibilities    266043     Sort order  TB
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  BASELINE  TIME1
AIPS 1:            SOURCE  FREQSEL  WEIGHT  SCALE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      1   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: FREQ       127   1.4147303E+09      64.00  1.2207031E+04    0.00
AIPS 1: STOKES       2  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: IF           1   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
AIPS 1: Maximum version number of extension files of type HI is   1
AIPS 1: Maximum version number of extension files of type AN is   1
AIPS 1: Maximum version number of extension files of type NX is   1
AIPS 1: Maximum version number of extension files of type SU is   1
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type CL is   1
AIPS 1: Maximum version number of extension files of type TY is   1
AIPS 1: Maximum version number of extension files of type WX is   1
AIPS 1: Maximum version number of extension files of type OF is   1
AIPS 1: Keyword = 'OBSCHANS'  value =          128
AIPS 1: Keyword = 'CORRMODE'  value = '2AC     '
AIPS 1: Keyword = 'SELCHANS'  value =          127
AIPS 1: Keyword = 'VLAIFS  '  value = 'AC    





On Mon, 2 Apr 2007, Eric Greisen wrote:

> Brian Kent writes:
>  > Dear DAIP,
>  > 
>  > I'm reducing some data for VLA project AK641 (extragalactic HI), and have
>  > encountered a message that someone might be able to help with.
>  > 
>  > I am in the "Chapter 4" stage of initial calibration.  I have copied the 
>  > tables over to my line data, used 'BPASS' and  'POSSM' to calibrate and 
>  > examine the bandpass, etc.  However, I run into a problem when I use 
>  > SPLIT:
>  > 
>  > I'm getting the following message when I try to use the task SPLIT:
>  > 
>  > CABORO> SPLIT1: UNKNOWN POLARIZATION PARAMETERIZATION =
>  > CABORO> SPLIT1: PROBLEM WITH SOURCE: HI1208+115
>  > CABORO> SPLIT1: FAILED TO SELECT VALID DATA
>  > CABORO> SPLIT1: Destroyed UV image file: catno=      3 disk= 1
>  > CABORO> SPLIT1: Purports to die of UNNATURAL causes
>  > 
> 
>     Can you send me the output of IMHEADER for these data?
> 
> Eric Greisen
> 
> 
>  > I searched and this is only DAIP archive message that I could find:
>  > 
>  > http://listmgr.cv.nrao.edu/pipermail/daip/2001-October/001797.html
>  > 
>  > I don't think that the case described case applies to me, however, the 
>  > error message is the same.  Nevertheless, I tried copying the AN table 
>  > over to the LINE data, just as I did with the FG and CL tables.  Still the 
>  > same error message.
>  > 
>  > So, I tried to start over, and simply SPLIT the raw, uncalibrated data UV 
>  > files, and I get the same result.
>  > 
>  > Have others encountered this message?  If there is any more information I 
>  > can provide, please let me know.
>  > 
>  > Thanks for your time and help,
>  > Brian Kent
>  > 
>  > _______________________________________________
>  > Daip mailing list
>  > Daip at listmgr.cv.nrao.edu
>  > http://listmgr.cv.nrao.edu/mailman/listinfo/daip
> 

-- 
_______________________________________________________
|  Brian Kent
|  Graduate Student
|  Department of Astronomy, Cornell University
|  bkent 'aT' astro.cornell.edu
|  http://www.astro.cornell.edu/~bkent/
_______________________________________________________