iraf.net

Hi all,
I'm still trying to solve why I get a bad wavelength calibration using fitcoord foutine and I hope someone out there could help.
The plot for x-y coordinates of the identified lines is here:http://www.iate.oac.uncor.edu/~charly/fitcoord.pngIt can be observed a huge tilt from side to side of the image. Moreover,
'y' coordinates do not match with the position of the identified lines as it can be seen in the below file, which is the output of the 'reidentify' routine.
Note that for each column the wavelength solution is identical and there are not negative values for 'y' (position of the lines, first column of the file below). However, the x-y plot clearly shows negative values for 'y' coordinates.
many thanks in advance.# Wed 11:22:05 07-Jul-2010
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0.04675295569119971# Wed 11:22:05 07-Jul-2010
begin identify cu1851[35,*]
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task identify
image cu1851[35,*]
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0.04675295569119971# Wed 11:22:05 07-Jul-2010
begin identify cu1851[25,*]
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task identify
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0.04675295569119971# Wed 11:22:05 07-Jul-2010
begin identify cu1851[15,*]
id cu1851
task identify
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
begin identify cu1851[45,*]
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task identify
image cu1851[45,*]
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
begin identify cu1851[5,*]
id cu1851
task identify
image cu1851[5,*]
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
begin identify cu1851[75,*]
id cu1851
task identify
image cu1851[75,*]
units Angstroms
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
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task identify
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
begin identify cu1851[95,*]
id cu1851
task identify
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begin identify cu1851[105,*]
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0.04675295569119971# Wed 11:24:05 07-Jul-2010
begin identify cu1851[115,*]
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