still doing my research on old time solar research
I found photo of sun taken at 6374 Fe nine times ionized
in Harvard books on astronomy telescope accesories 1945 page 213
has any one tried this line?
like one I tried - Al line that I found in old W Semerau article
question to SHG owners
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Re: question to SHG owners
JP,
If you re-read that section (p210-215) you'll see that they are referring to the Coronagraph developed by Lyot. I think the highly ionised Fe is only associated with the corona and not visible in the chromosphere.
If you re-read that section (p210-215) you'll see that they are referring to the Coronagraph developed by Lyot. I think the highly ionised Fe is only associated with the corona and not visible in the chromosphere.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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Re: question to SHG owners
Ok and correct
but I did notice a lot of proms in image
figured you may get prom and empty disk
similar to a shot Wah took a while back in helium D3
but I did notice a lot of proms in image
figured you may get prom and empty disk
similar to a shot Wah took a while back in helium D3