28May: Waving goodbye to AR12824/12826

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p_zetner
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28May: Waving goodbye to AR12824/12826

Post by p_zetner »

Hi Everyone.
Here are some H alpha images of the disappearing ARs taken with the C8 Edge / Daystar 0.6QPE system at about f/30. There are two on-band images taken with different camera gamma settings. A slightly less contrasty gamma was used to try and capture the two surges evident in the picture. In the more contrasty image (taken ~20 minutes afterwards), there was some interesting streaming between the two spots in AR12826 (at the limb). The off-band image was taken at a detuning of ~0.8 angstroms to the blue, showing a number of Ellerman bombs. Seeing was mediocre so detail is lacking but it was my only "kick at the can".
Cheers.
Peter
28May2021_H-alpha_AR12824-12826.png
28May2021_H-alpha_AR12824-12826.png (890.55 KiB) Viewed 385 times
28May2021_H-alpha_AR12824-12826_(2).png
28May2021_H-alpha_AR12824-12826_(2).png (998.55 KiB) Viewed 385 times
28May2021_H-alpha-blue_AR12824-12826.png
28May2021_H-alpha-blue_AR12824-12826.png (1.07 MiB) Viewed 385 times


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Re: 28May: Waving goodbye to AR12824/12826

Post by ffellah »

A beautiful set of images, Peter: the off band is very interesting also. Well done !

Franco


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Re: 28May: Waving goodbye to AR12824/12826

Post by DeepSolar64 »

The off band image really shows the spicules well!! I see a couple of Ellerman bombs in there too.


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Re: 28May: Waving goodbye to AR12824/12826

Post by JochenM »

Excellent captures and observation, Peter.


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Re: 28May: Waving goodbye to AR12824/12826

Post by Valery »

Excellent shots for such a seeing conditions. Contrast in the Ha core is my favorite. And the off-band image is very illustrative.

BTW. Have you ever think about adding about 0,7A Lunt LS50FHa etalon (not a mini red colored version)? Such a double stack helps a lot against mediocre seeing. I believe that in a visual mode it will be a killer combination.


Valery


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Re: 28May: Waving goodbye to AR12824/12826

Post by Astrophil »

The images are very good Peter, quite informative and helpful with the descriptions. Thanks.

Phil


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Re: 28May: Waving goodbye to AR12824/12826

Post by p_zetner »

Thanks everyone.
Valery: I have had lots of frustration trying to double stack the Lunt LS50FHa with the Daystar Quantum. I’ve tried numerous optical configurations (collimated beams, telecentric beams) and have always been plagued by banding from the Lunt. Almost ready to give up!
Cheers
Peter


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Re: 28May: Waving goodbye to AR12824/12826

Post by Valery »

p_zetner wrote: Sun May 30, 2021 7:37 pm
Valery: I have had lots of frustration trying to double stack the Lunt LS50FHa with the Daystar Quantum. I’ve tried numerous optical configurations (collimated beams, telecentric beams) and have always been plagued by banding from the Lunt. Almost ready to give up!
PM sent.


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Re: 28May: Waving goodbye to AR12824/12826

Post by MAURITS »

Excellent Peter.


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Re: 28May: Waving goodbye to AR12824/12826

Post by arnedanielsen »

Great work Peter! Thanks for sharing!

Best regards,
Arne


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Re: 28May: Waving goodbye to AR12824/12826

Post by H-Alpha »

Fantastic Peter!
And despite the seeing.
Best wishes,
Alexandros


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