The program 
Aperplates.f
the different variations 1,2,3,4,5,6 have different imput format to match
the different .coo files.

Reads inp.coo writes in.coo.

*****************************************************************************
Below a few lines from inp.coo
These files are from Hwankyung Sung and the star positions are given as
relative positions in arcmin from the cluster center. 
Line 1 is the coordinate of the centre of the circular aperture, again measured
from the cluster centre.
The program apercenters.f computes the RA and Dec of the apertures from the
relative coordinates of the aperture plate centers.

For each star the program then reads the star name, the V mag and the delta RA 
and delta dec (last two columns). 
It outputs the x and y coordinates in mm and the information about the stars. 

input
:inp.coo:
 -1.9  -2.6
"n6231_ 171" 16 53 47.96 -41 55  4.3 J2000.0 ! Q 12.649  0.523  0.342 -0.108 4444  -4.647  -4.582
"n6231_ 178" 16 53 48.63 -41 51 54.1 J2000.0 ! I 14.533  0.875  0.653  0.413 4444  -4.526  -1.411
  ...

output
:in.coo:
   9.773  19.026  "n6231_ 171" Q 12.649
  11.236  57.382  "n6231_ 178" I 14.533
  ...

The light is dispersed in the "Y" direction.
Check that stars are not closer than 0.4mm (POINT) or 1.0mm (SLOT) 
and edit out those that do. 
A few lines are then added to the top (see readme_asc2dxf for details)
to produce input for asc2dxf

:in.coo:
n6231cp6.dxf
slot
line
   2.00    43.00
   9.00    43.00
point
   9.773  19.026  "n6231_ 171" Q 12.649
  11.236  57.382  "n6231_ 178" I 14.533
  ...

the output of this program is as follows 

:n6231cp6.dxf:
0
SECTION
2
ENTITIES
0
CIRCLE
8
1
62
3
10
43.00
20
43.00
30
0.000
40
43.00
0
LINE
8
1
62
3
10
 2.000
20
43.000
30
0.000
11
 9.000
21
43.000
31
0.000
0
LINE
8
1
62
3
10
 9.773
20
19.026
30
0.000
11
10.773
21
19.026
31
0.000
0
LINE
8
1
62
3
10
11.236
20
57.382
30
0.000
11
12.236
21
57.382
31
0.000
0
LINE
...
...
...
ENDSEC
0
EOF

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