Quote:
Originally Posted by Merlin66
Good analysis Terry!
An extraordinary outcome; 24.1 A/pixel is pretty low resolution even for a SA grating... the distance to the chip could be increased i.e. almost doubled. The severe drop off in the blue-UV is not unusual, but the deep absorption threw me- it just looked to much like a H beta point! Moral of the story? - the info's in the spectra - somewhere!
Looks like Terry's curve has at least been corrected for CCD response and fitted to the Planck curve. ( Tutorial #5)
I've got to ask... Jeff - what was the issue with your first betcar spectra?
Are you doing some pre-processing??
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My resolution depends on which camera I use. With my ST9E at f8 I get ~32A/pixel as the pixels are 20um square. If I use my Audine type camera with a KAF0401E CCD at 9um pixels I get ~12.4A/pixel.
I can't easily increase the distance with the ST9 as I run out of back focus and it is a hassle to change the cameras. I use the ST9 for photometry so leave it in place usually on the scope.
It is a trade off I suppose.