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The file needed is the 2 DIMENSIONS RAW spectrum, just what your camera gave, without any processing. It may weight 2 or 3 Mo.
Of course it is a FITS file that your camera produced.
Benji

Hi Pete,
Can you join the *** raw 2D spectrum *** of your Relco calibration lamp in bin 2x2 in order to be able to help you?
The file needed has to be unprocessed!
Benji

Hi Ernst,

I hope you're going fine.
Why are you talking about a ring?
In such system without any intense magnetic field it would be a disk rather than a ring.

Cheers,

Benji

Thanks Thibault.
Benji

Bonjour Emmanuel,
Un paquet pour Ubuntu 18.04 est disponible sur : http://spcaudace.free.fr/audela/
Bonne spectro,
Benjamin

Hi Stu, If you are looking for a spectral processing and analysis software to manage our spectra on Linux, there is Spcaudace: http://spcaudace.free.fr . It a plugin of Audela free software in English and French language that can be ran on Linux/Win/MacOS systems. There is an ubuntu package availabl...

Hi David, The method you described to compute RP (resolution power) will not describe LISA caracterictics, ie non linear dispersion and focus along wavelength band width covered. RP depends on wavelength as you said, as RP=Lambda/Delta_lambda where Delta_lambda=FWHM(of line at Lambda), it is needed ...

Hi,
Could you join a FITS file of the 2D spectrum of your calibration lamp in bin 2x2?
Be aware not to over expose the red lines.
Is your calibartion lamp a Relco?

Benji

Nice graphic.
But temperature's unit has to be corrected to K (neither °K nor °C).
Could you share your Python script?
Cheers,
Benji