Quote:
Originally Posted by malclocke
I'd probably agree with Robin that the SA100 might not show this. The emission is only 20% stronger than the continuum.
Attached is an SA100 spectrum I took of Achernar last year with a very far from optimal set-up comprising a dob and an 8 bit guide camera. The spectrum is almost featureless, but it would be interesting to see results from more competent SA100 users.
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Given it is such a bright target, the best bet with the Star Analyser would probably be to record it with the grating in front of a camera lens. That would potentially give the best resolution because the beam is collimated through the grating. 10-15A resolution is possible with this kind of setup which should be enough to isolate the emission from the broad absorption
Cheers
Robin