[daip] curious iring problem

[Eric Greisen]

Lawrence Rudnick wrote:
> Eric - curious IRING problem.  I get all zeros for valid pixels on this 
> image;  very similar images successful in past, but something not 
> working here.  they were constructed outside of AIPS from GBT data.
> Same problem on 31DEC11 at Minnesota and 31DEC12 (I assume) on alcor at AOC.
> 
> Following are the IRING inputs.
> 
> The map in question is in /users/lrudnick/A2142_GB_DESTRIPE.FITS
> 
> thanks.
> 
> larry
> 
> AIPS 1: IRING:  Task to integrate in confocal ellipses.
> AIPS 1: Adverbs     Values                 Comments
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: USERID        0                    User ID - ignored
> AIPS 1: INNAME     'A2142'                 Image name (name)
> AIPS 1: INCLASS    'DESTRP'                Image name (class)
> AIPS 1: INSEQ         1                    Image name (seq. #)
> AIPS 1: INDISK        1                    Disk drive #
> AIPS 1: BLC          50.4         3.2      Bottom left corner of image
> AIPS 1:               1           1          0=>entire image
> AIPS 1:               1           1           1
> AIPS 1: TRC          85.8        37.2      Top right corner of image
> AIPS 1:               1           1          0=>entire image
> AIPS 1:               1           1           1
> AIPS 1: APARM        -7          33        Orientation parameters:
> AIPS 1:            *rest 0                 1: x - coordinate center wrt
> AIPS 1:                                       reference point in pixels
> AIPS 1:                                    2: y - coordinate center wrt
> AIPS 1:                                       reference point in pixels
> AIPS 1:                                    3: position angle major axis,
> AIPS 1:                                       degrees
> AIPS 1:                                    4: inclination of rings
> AIPS 1:                                       to plane of sky, deg.
> AIPS 1:                                    5: full range of azimuthal
> AIPS 1:                                       angles to consider, deg.
> AIPS 1:                                       0 => 360 degrees
> AIPS 1:                                    6: central azimuthal angle
> AIPS 1:                                       of the range specified in
> AIPS 1:                                       APARM(5), deg.
> AIPS 1: CPARM         0        2000        Specification of rings:
> AIPS 1:              60           0        1 : radius inner ring  (")
> AIPS 1:               1        *rest 0     2 : radius outer ring  (")
> AIPS 1:                                    3 : width of each ring (")
> AIPS 1:                                    4 : 1=>treat blanks as zero
> AIPS 1:                                    5 : 1=>plot radial intensity
> AIPS 1:                                        2=>plot integrated
> AIPS 1:                                           radial intensity, from
> AIPS 1:                                           inner ring outwards.
> AIPS 1:                                    6 : 1 => CPARM(1-3) in pixels
> AIPS 1:                                    7 : scale X axis by CPARM(7)
> AIPS 1:                                    8 > 0 => y limits in 9, 10
> AIPS 1: KEYSTRNG   ' '                     X axis type if CPARM(7) > 0
> AIPS 1: SYMBOL        0                    Plot symbol number: 1 - 24
> AIPS 1: FACTOR        0                    Scale plot symbols by FACTOR
> AIPS 1:                                    <0 => connect points too
> AIPS 1: DOTV          1                    > 0 Do plot on the TV, else
> AIPS 1:                                    make a plot file
> AIPS 1: GRCHAN        0                    Graphics channel 0 => 1.
> AIPS 1: OUTTEXT    *all ' '                Not blank => write list x,y
> AIPS 1:                                    plot points to text file
> 
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Your image has a Y reference pixel of 56 which is off the image above 
it.  the real object is probably at -7,-33 not -7,+33

IRING gave nice results in that case.

Eric