May 27, 2021 AR12824, 12826 WL and Ha

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Astrophil
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May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Hi All,

Another decent day for imaging even through thin clouds and haze this morning. No proms, just ARs.

Phil
20210527_084947_AR12824_12826_WL.jpg
20210527_084947_AR12824_12826_WL.jpg (284.64 KiB) Viewed 484 times
20210527_085240_V_WL_l.jpg
20210527_085240_V_WL_l.jpg (252.71 KiB) Viewed 484 times
20210527_092120_AR12824_1282Hal.jpg
20210527_092120_AR12824_1282Hal.jpg (250.47 KiB) Viewed 484 times
20210527_093445_AR12824_12826_Ha.jpg
20210527_093445_AR12824_12826_Ha.jpg (355.47 KiB) Viewed 484 times
20210527_092355_AR12824_12826_inv.jpg
20210527_092355_AR12824_12826_inv.jpg (308.31 KiB) Viewed 484 times


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by EGRAY_OBSERVATORY »

Hi Phil,
So well done on your excellent captures showing so much detail of these two AR's before the dive over the edge.

Cheers
Terry


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Stardust5858 »

Lovely captures Phil, thanks for sharing.


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by ffellah »

Beautifully captured and processed, Phil.

Franco


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by arnedanielsen »

Great stuff Phil!

Best regards,
Arne


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Carbon60 »

Excellent, Phil. Beautiful images.

Stu.


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by p_zetner »

Spectacular images, Phil.
What continuum wavelength are you using for the white light images?
How far detuned is your H alpha image (2nd from the bottom)?
Cheers.
Peter


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Peter,

The continuum image was using the unheated etalon so I assume a wavelength of approximately 656nm.
Great observation. To my untrained eye I had not noticed the differences other than processing variations. Etalon temperature was not intentionally changed. During the 13 min. between shots, a focal reducer was added and I had to wait for gaps in the clouds. Maybe that had an effect.
What is your estimation of wavelength shift?

Phil


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by p_zetner »

Hi Phil.
I will try the unheated etalon on my next imaging session. It’s a great result.
The off-band H alpha looks like a ~0.5 angstrom detuning. If the etalon was cooling this would be to the blue.
Cheers.
Peter


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Thanks Peter. I will try setting the temp higher next session.

Phil


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by H-Alpha »

Just amazing Phil!!! :bow :bow :bow
You get so much definition despite the fact that the areas are close to the edge!
And there is also so much 3D impression on your two last Ha. How do you achieve this?
Is the focal reducer that makes the miracle? (apart your experience) What is your train for the last two photos?
best wishes,
Alexandros


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by dhkaiser »

Well bone Phil.


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Hi Alexandros, and thanks.

No secret ingredients, just focus well, stack, and I use Imppg for the main processing and usually a quick descreening in an image processing program.
Maybe some level or curve adjustments, crop out the edge artifacts, that’s about it. Good luck.

Phil


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by p_zetner »

Hi Phil.
Actually your detuning might be smaller. I was thinking in terms of my filter which has a 0.6 angstrom bandpass. I think your filter is narrower? So, it might be a shift on the order of your bandpass.
Cheers.


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Thanks Dan.


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Peter,
The filter is speced at 0.3A. I’m not sure exactly what I get from it but at about 1angstrom per 9°C, I’ll try a 3° change.

Phil


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by DeepSolar64 »

Very fine views of two departing active regions!


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Valery »

Very nice images, Phil. Thanks for sharing.

Valery


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Montana »

Wow!! amazing images :bow :hamster:

What model SolarSpectrum do you have?

Alexandra


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by MAURITS »

Lovely images Phil.


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by Astrophil »

Thanks again for the kind words.

Alexandra, the filter I'm using is a Solar Spectrum, Solar Observer SO-1.5 0.3ang. 25mm aperture. It's nice but still needs flats.

Phil


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Re: May 27, 2021 AR12824, 12826 WL and Ha

Post by MapleRidge »

These are superb images Phil...very impressive capture and processing :bow

Brian


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