30July2015 PZ SHG images.

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p_zetner
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30July2015 PZ SHG images.

Post by p_zetner » Tue Aug 04, 2015 6:05 am

Hello Everyone.

An opportunity for a relatively intensive SHG workout on July 30! I was able to image in CaII K (393.37 nm), CaI g (422.7 nm), H beta (486.13 nm), HeD3 (587.56 nm) and H alpha (656.28 nm) with a bandpass of about 0.2 Angstroms.

First, I present CaII K (393.37 nm), HeD3 (587.56 nm) and H alpha (656.28 nm) in comparison with images from the KIS ChroTel telescope (HeD3 is compared with the ChroTel He 1083 nm image):
CaK_ChroTel_montage_frame.png
HeD3_ChroTel_montage_frame.png
H-alpha_ChroTel_montage_frame.png
Next, a comparison of a blue-wing CaII K image with the CaI g-line image. The CaI line is quite narrow so there is a significant contribution to the image from the wings of this line, hence, more of a photospheric image, as you get in the wings of the CaII K line.
CaK_blue wing_Cag_montage_frame.png
Next, a comparison of H alpha with H beta. The proms, separately processed, have been added. There doesn't seem to be much of a similarity between H alpha and H beta but that changes if you image in the wings of the H alpha line. The NSO - SOLIS images in H alpha are generated in the line core and in the line wings. The "wings" image is very similar to H beta. Here's the link to these images:
http://solis.nso.edu/0/fdp/fdp_fulldisk.html
(I wasn't careful enough with my exposures to be able to image in the H alpha wings.)
H-alpha_H-beta_montage_frame.png
Finally, three "spectral series" showing images taken at slightly different wavelengths within an absorption line. The numbers in each frame are the wavelength displacements from the line centre (judged by eye and designated by the "0.00"). Positive (negative) numbers indicate a red (blue) shift.

First, a CaII K disk spectral series:
CaK_Montage_spec-series_ARL9x9_proc_siz.png
Next, a CaII K prominence spectral series:
(The prominence study is interesting. There is a substantial component of this CaII prominence which is receding from us (red shifted with respect to line centre).)
Montage_CaK_proms_spec-series_proc_frame.png
Finally, a HeD3 disk spectral series:
HeD3_Montage_spec-series_shrp_proc_siz_frame.png
Hope you enjoy!!
Peter.

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Re: 30July2015 PZ SHG images.

Post by marktownley » Tue Aug 04, 2015 7:02 am

A stunning and very comprehensive set of images there Peter, you really are wetting my appetite for all this now!
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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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Re: 30July2015 PZ SHG images.

Post by DSobserver » Tue Aug 04, 2015 11:35 am

Waouuuu!!!! Amazing job!

I'll be really thanksfull if youcan describe precisely how you manage HeD3 picture.... :bow

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Re: 30July2015 PZ SHG images.

Post by Montana » Tue Aug 04, 2015 11:50 am

:shock: :shock: :shock: WoW!!! what an amazing presentation! The science in this info is outstanding.
:bow :bow :bow

All can say is I was thrilled to look through these, the CaK prom is fascinating, the Hbeta I have always thought looks like offband Halpha :)

Alexandra

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Re: 30July2015 PZ SHG images.

Post by Merlin66 » Tue Aug 04, 2015 10:00 pm

Peter,
An excellent presentation!
Well done.
"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: 30July2015 PZ SHG images.

Post by p_zetner » Wed Aug 05, 2015 11:51 pm

Thanks for your interest and your comments, everyone!
Thought I'd upload a compilation picture of the above posts .... six faces of the Sun.
It emphasizes a major attraction of spectroheliography ... easy imaging at multiple wavelengths.

Cheers.
Peter.

(Vincent: Please see my previous answer to your question: http://solarchat.natca.net/viewtopic.php?f=8&t=12392)
six_sun_montage_sz_frm.png

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Re: 30July2015 PZ SHG images.

Post by Wah » Thu Aug 06, 2015 2:41 am

Excellent results! :bow :bow :bow

Allow me to remove the bands for you~
Attachments
HeD3.png
CaK.png
H-alpha.png

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Re: 30July2015 PZ SHG images.

Post by p_zetner » Thu Aug 06, 2015 3:41 am

Thanks, Wah!

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Re: 30July2015 PZ SHG images.

Post by Derek Klepp » Fri Aug 07, 2015 10:00 am

Very infomative Peter I enjoyed reading this.Your final collage sums it all up nicely.

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