April 30 Spectroheliograms

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p_zetner
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April 30 Spectroheliograms

Post by p_zetner » Thu May 12, 2016 8:37 pm

Greetings Everyone.

Amidst finishing up my Mercury transit images, I thought I'd post these spectroheliograms from April 30.
I have some more processing to do and hope to add some more images in the next few days.

Cheers.
Peter.
Montage_113720_select_crop_03-4-5_flat-div_proc2_rot_fin_siz.png
Montage_115851_rot-crop_flat-div_fft-h_1-3-5_ARL5x5_final_siz.png
Montage_Diff_m14x85_siz_fft-h_01-4-7_proc0_ARL5x5_proc_siz.png

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grimble_cornet
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Re: April 30 Spectroheliograms

Post by grimble_cornet » Thu May 12, 2016 8:54 pm

Interesting to see such a wide range of wavelengths Peter.
Thanks for sharing the results of your experiments.
.

.



.


Mike Garbett

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Re: April 30 Spectroheliograms

Post by highfnum » Thu May 12, 2016 9:02 pm

oh HeD3 nice

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Re: April 30 Spectroheliograms

Post by Derek Klepp » Thu May 12, 2016 9:45 pm

Thanks Peter

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Re: April 30 Spectroheliograms

Post by marktownley » Fri May 13, 2016 6:09 am

These are excellent Peter, really illustrates well the difference when not 'on band' on these spectral lines.
Image
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!

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Montana
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Re: April 30 Spectroheliograms

Post by Montana » Fri May 13, 2016 9:10 am

This is an excellent series, well done, some lovely comparisons :bow :bow :hamster:

Alexandra

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Re: April 30 Spectroheliograms

Post by Merlin66 » Fri May 13, 2016 1:52 pm

Once again Peter, excellent results well presented.
Have you tried John's synthetic flat fielding process available in the latest BASS Project release?
"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

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Re: April 30 Spectroheliograms

Post by p_zetner » Sat May 14, 2016 4:15 am

Cheers and thanks for the comments, everyone.

Ken: I see you noticed that the spectroheliograms are a little lacking with regard to uniformity! I'd be interested in the flat-fielding process you're referring to. Can you direct me to a description of it?

Peter.

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Re: April 30 Spectroheliograms

Post by Merlin66 » Sat May 14, 2016 5:28 am

Peter,
The BASS Project software is available for download from the BASS Yahoo group (I can't seem to provide a link on the iPad) The latest instruction manual details John's synthetic flat fielding process.
Hope that helps.
Ps It's also fully explained with examples in the new book.
https://uk.groups.yahoo.com/neo/groups/ ... s/messages
"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

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