Quote:
Originally Posted by Merlin66
Markus,
On the spectral graph the X axis is in wavelength Angstrom.
Sirius is a A type star with prominent H Balmer series absorption lines - that's what you see. The curve (intensity values) drop off towards the left partly due the spectrum of Sirius (Back body) but also the camera sensitivity.
The ability to record much below 3700A is compromised.
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Ah, interesting - thank you for explaining :-)
Markus