I did post to this forum on 2nd September, which prompted Gary’s reply, but my post disappeared!
Anyway, thanks for all your replies/comments, I will work towards calibrating my spectra so they are suitable for the database.
My one question is: What is the best software to use? I have used VisualSpec in the past but is there a better option.
And one final comment, Nigel Evans has derived the dispersion equation for my system so I can calculate the wavelength for any pixel value in the spectrum. Very useful, especially for planetary nebulae where there is an image rather than a line.
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