Data Processing
Data processing would be the biggest problem when starting with spectroscopy.
Spectra reduction is devided in two parts:
Image reduction and spectra calibration
Image reduction contains similar to astrophotography:
- Bias correction
- Dark substraction
- Flat feld correction
- Sum or average of image
- The corrected sum spectrum has now to align parallel to the horizontal axis of the detector.
- Second the curved calibration lines to to be alligned vertical.
The image reduction could be done with standard image processing software e.q. AstroArt.
But for the spectral calibration could be done with special programs like BASS-Project
(Basic Astronomical Spectroscopy Software)
For Alpy600 Spectrograph the program ISIS from Christian Buil. and also the Demetria software from Shelyak Intruments (France)
For L-200 Spectrograph I use AstroArt for image reduction and BASS-Project for calibration.