SHG shot caH caK for today
SHG shot caH caK for today
near end of day -- had to rush
but thay came out ok
caH
but thay came out ok
caH
- Merlin66
- Librarian
- Posts: 3231
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: St Leonards, Australia
- Contact:
Re: SHG shot caH caK for today
Well done, mate!
Looks like you're getting good results from the SHG.
Looks like you're getting good results from the SHG.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Montana
- Way More Fun to Share It!!
- Posts: 20033
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
Re: SHG shot caH caK for today
Very nice images
Alexandra



Alexandra
Re: SHG shot caH caK for today
thx guys/gals I notice subtle differences between caK and caH
what is your opinion on difference?
I reprocessed
I have learned that even selecting exact line position on spectrum can effect outcome of image
caH redo notice little prom on right
what is your opinion on difference?
I reprocessed
I have learned that even selecting exact line position on spectrum can effect outcome of image
caH redo notice little prom on right
Re: SHG shot caH caK for today
caK redo - Idont see little prom on right
Re: SHG shot caH caK for today
Merlin66 what is the spiel(NY slang) on caH vs caK?
- Merlin66
- Librarian
- Posts: 3231
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: St Leonards, Australia
- Contact:
Re: SHG shot caH caK for today
The calcium II lines form a pair of resonance lines, like the sodium doublet(D1 and D2).
According to Gray and Corbally "Stellar Spectral Classification" they "....grow with decreasing temperatures down to spectral type K5 (4500K)...." They, and the Sodium D1/D2, Magnesium I triplet, Halpha as well as the CaII triplet lines 8498/8542/8662A are used to determine chromosphere activity in stellar systems. Zirin and others seem to "prefer" observing in CaK but with no reasons given....
Summary- there's no real difference between K and H lines for data content.
According to Gray and Corbally "Stellar Spectral Classification" they "....grow with decreasing temperatures down to spectral type K5 (4500K)...." They, and the Sodium D1/D2, Magnesium I triplet, Halpha as well as the CaII triplet lines 8498/8542/8662A are used to determine chromosphere activity in stellar systems. Zirin and others seem to "prefer" observing in CaK but with no reasons given....
Summary- there's no real difference between K and H lines for data content.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- MapleRidge
- Way More Fun to Share It!!
- Posts: 5383
- Joined: Fri Jan 13, 2012 11:58 pm
- Location: Cambray, ON Canada
Re: SHG shot caH caK for today
Great images...well done!!!
Brian
Brian
Brian Colville
Maple Ridge Observatory
Cambray, ON Canada
Maple Ridge Observatory
Cambray, ON Canada
- marktownley
- Librarian
- Posts: 24842
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Contact:
Re: SHG shot caH caK for today
Good shots!

http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- Merlin66
- Librarian
- Posts: 3231
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: St Leonards, Australia
- Contact:
Re: SHG shot caH caK for today
J-P,
The possible interference between the CaH line (3968A) and the nearby Hepi line (3970A) seems to be at least part of the reason for the selection of the CaK for observers.
The possible interference between the CaH line (3968A) and the nearby Hepi line (3970A) seems to be at least part of the reason for the selection of the CaK for observers.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
Re: SHG shot caH caK for today
sept 20 caH very clear sky
prom and filaments
prom and filaments
- DSobserver
- Almost There...
- Posts: 545
- Joined: Sun Feb 19, 2012 2:36 pm
- Location: FRANCE
Re: SHG shot caH caK for today
good shot!
I think that improving slit focus, you would reach even better results...
I think that improving slit focus, you would reach even better results...
Re: SHG shot caH caK for today
im trying
200mm collminator lens = tricky to get just right
im thinking of increasing to 300mm
200mm collminator lens = tricky to get just right
im thinking of increasing to 300mm
Who is online
Users browsing this forum: No registered users and 1 guest