Hello h-g, Good to see the old quickcam is still working and producing good spectra :-) I have used visual spec and wavelength calibrated your spectrum using H...
Maybe a Sally question but.. Planning to take spectra in Ha of epsilon Aurigae in winter and next year. Question: The Ha filter, where to put it before or...
In my humble experience, doesn't matter. When placed infront, the grating will still diffract the light as normal, but obviously there's only the Ha available....
Hi h-g, Why use a filter? Eps Aurigae is very bright so you should not have a problem with sky background even with a slitless setup. The resolution of a ...
Hi Daniela, Ha is Hydrogen Alpha. The first line in the Balmer series at 6563 Angstrom. Many stars (including the sun) show this as an absorption line. Other...
Let me jump in here a bit. I'm sure Robin will have some say too. One of the most interesting areas of the spectrum of epsilon Aurigae (and many other stars)...
You are right. There is not much advantage in using the Star Analyser just on Ha compared with doing photometry with say a 5nm bandpass Ha filter ( The SA will...
Hi Robin, I suggest in addition to Stencel's web site people check the offical Epsilon Aurigae Campaign Web Site at http://www.hposoft.com/Campaign09.html Jeff...
OK now i understand better - thanks everybody. Yes I meant a narrow band 5-6nm bandpass as a better choice, as opposed to the nebular filter of 13nm and the...
Hi Robin and others, Some additional thoughts. CCD photometry of epsilon Aurigae is difficult. While not impossible, almost all the advantages of CCD...
Hi Robin, there may be utility of using an Ha filter ahead of the SA to do more precise Ha work? We discussed the ability to improve S/N in past posts as one...
hello Pierre, Â i put the spc images in the files of the group i have not used the canon d350, and no slit i used the watec 120N video for the spc of altair...
More from Arne Henden of on AAVSO-DIS today about this one <SNIP> Finally, for you southern observers, IAUC 8990 (and Alert Notice 388) give the designation...
I have been following Robin's instructions re using the Staranalyser. I have produced 3 fits files (R,G,B) in K3CCD. How do I get IRIS to load all three files...
Hi and welcome to the group, Well there must be way of doing it in IRIS but I cannot think of it offhand. Strange as it might seem, one way would be to put the...
Robin, Thanks for your last post. I have tried getting some more images with SA but the spectral lines are not showing clearly at all. My equipment is: ...
Hi John, most stars don't show individual spectral lines, just a spectral continuum. See if you notice a telluric line in the near IR. Try a spectrum of a...
Hi John, Altair should be a good target for the Star Analyser. It is a bright A type star which should show clear Hydrogen Balmer lines. Looking at the...
Hello Robin and Richard, Thanks for your helpful feedback. I have up-loaded some more files to my folder 'JohnW'. For some reason my Vega result has turned out...
Hi John, I think your spectra look pretty good for a newbie. I assume that your SA grating is after the focal reducer? If you can get the grating ahead of the...
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