xyxymatch and tables

Octavi Fors Aldrich wrote on Jul 24, 1998

Hello all!

I've been working with some immatch tasks for the first time, and some
questions have coming up. In particular, with the xyxymatch task:

I'm working with different CCD frames, and when I finish to detect
stars-like objects (with daofind or starfind tasks), I need to match the
output list in some way. The output  dao1.coo.1,dao2.coo.2 files have
this aspect:

dao1.coo.1
#N XCENTER   YCENTER   MAG      SHARPNESS   SROUND      GROUND
ID         \
#U pixels    pixels    #        #           #           #
#          \
#F %-13.3f   %-10.3f   %-9.3f   %-12.3f     %-12.3f     %-12.3f
%-6d       \
#
   365.952   4.223     -2.864   0.588       -0.011      -0.040      1
   65.027    15.635    -0.332   0.705       -0.088      0.157       2
   84.394    18.805    -0.024   0.507       0.020       -0.317      3
...

dao2.coo.1
#N XCENTER   YCENTER   MAG      SHARPNESS   SROUND      GROUND
ID         \
#U pixels    pixels    #        #           #           #
#          \
#F %-13.3f   %-10.3f   %-9.3f   %-12.3f     %-12.3f     %-12.3f
%-6d       \
#
   366.152   3.510     -2.371   0.453       0.382       0.176       1
   64.968    14.764    -0.392   0.509       0.134       0.100       2
   943.462   25.989    -0.343   0.306       -0.315      -0.019      3
...

and xyxymatch is able to understand them, doing something like:

im> xyxymatch dao1.coo.1 dao2.coo.2 match12.xy

Up to here, no problem! What is ugly is that xyxymatch doesn't deal with
other fields different from position, I mean, that you obtain an output
like this:

match12.xy
# Column definitions
#    Column 1: X reference coordinate
#    Column 2: Y reference coordinate
#    Column 3: X input coordinate
#    Column 4: Y input coordinate
#    Column 5: Reference line number
#    Column 6: Input line number

      366.152         3.510        365.952         4.223     42    42
       64.968        14.764         65.027        15.635     43    43
      943.462        25.989        943.118        27.099     44    46
...
but the information regarding the MAG fields,for example, is lost. Is
there any way to preserve MAG fields after matching two *.coo.1 tables.
In case of not, could be possible to recorver this information, for
example coming back to the dao1.coo.1, dao2.coo.2 files and  using some
task able to browse them in function of the match12.xy file? For
example, using this syntax:

cl> task dao1.coo.1 match12.xy "XCENTER==Column1 && YCENTER==Column2"
dao1_matched.coo.1 "XCENTER,YCENTER,MAG"

where "XCENTER,YCENTER,MAG" are the fields to be saved in the
dao1_matched.coo.1 output file
and "XCENTER==Column1 && YCENTER==Column2"  means only select those rows
which have the same X,Y coordinates.

Thanks in advance,

=================================================================

Octavi Fors Aldrich

Astronomy Department
Physics Faculty
Avgda. Diagonal 647
08028 Barcelona
SPAIN


octavi@fajnm1.am.ub.es

=================================================================

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Last post on Jul 24, 1998