AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

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MalVeauX
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AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by MalVeauX »

Hi all,

I had a small window this morning (0800am Eastern Time) here in Florida before clouds & rain rolled in. It's now thunder storming of course. But in that brief period I had a chance to get some decent data on AR2767. The spot has evolved a bit and the plage has decayed to something smaller with less major filaments coming from the area. Being close to the center of the face of the disc in its transit, some features are more obvious now (like cells, and the structures in the penumbra and sometimes the inner structure of the umbra itself). The plage is less dramatic and mottling less dramatic straight on compared to at an angle where more contrast is on the spicules. But straight on like this, the convection cells and k-grains are a bit more obvious with better contrast I think compared to at an angle. I noticed the beginnings of what might be a light bridge were different in the various wavelengths, in HA it appeared to have a nearly complete light bridge in two sections of the umbra, but I didn't see that same structure in Gband, but the structure's root to the umbra was visible, however in CaK it was a little less visible. Kind off as I have not noticed that before (with a completed light bridge I typically note it in all wavelengths). So perhaps it was not a light bridge. I'm not sure, so I'm interested in everyone's thoughts on this phenomena!

B&W:

Image

Image

Image

Image


Colored:

Image

Image

Image

Image


Seeing Conditions (not great, but supported the image scales of 0.2" to 0.4" per pixel with sub-arc-second-seeing):
SeeingConditions_07272020.jpg
SeeingConditions_07272020.jpg (122.1 KiB) Viewed 1276 times

Equipment:

150mm F8 Refractor
+ 2" Baader Red CCD-IR Block Filter (Sub-aperture internal D-ERF) + Baader GPC 1.25x (F10) + PST 1A HA Etalon + 10mm BF + ASI290MM
+ 2" Baader Blue CCD-IR Block Filter (Sub-aperture internal D-ERF) + 2.5x Telenegative Amplifier (F20) + EdmundOptics 430nm Filter + Baader 3.0 ND + ASI290MM
+ (aperture masked to 120mm F10) + 2" Baader Blue CCD-IR Block Filter (Sub-aperture internal D-ERF) + 2.5x Telenegative Amplifier (F25) + Lunt CaK B1200 + ASI290MM
Solarsetup_07272020.jpg
Solarsetup_07272020.jpg (39.95 KiB) Viewed 1276 times

Very best,


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by dhkaiser »

Awesome images Marty. I leave comments on the light bridge to the more knowledgeable.


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by rsfoto »

Hi Marty,

Very good and here it is raining due to " Hanna "


regards Rainer

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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by p_zetner »

Excellent images, Marty.
Awesome H-alpha and the WL and CaK shots are very crisp and detailed.
Cheers.
Peter


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by DeepSolar64 »

WoW Marty! The Ha ones are good but the Gband and CaK ones are absolutely stunning. Incredible job my friend!


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by eroel »

Marty, agree with James, the G band and the CaK are super.
Best regards,
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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by marktownley »

A very good set of images Marty, glad you got something before the weather came in.


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by EGRAY_OBSERVATORY »

Hi Marty, excellent images - thanks vm

Terry


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by MalVeauX »

Thanks all,

Here's an animation (forgive me its a little large, 3.5MB, may take a minute to load) of the three wavelengths aligned to see how the structures change through the layers of the chromosphere and photosphere.

(If anyone knows a way to make these files more efficient for gif animation, that would be a great help, I can't seem to ever get them to be 500kb or anything like that, always several MB despite the files being only a few Kb each)


Animation of HA, CaK & Gband of the Sunspot and surrounding structures
Animation of HA, CaK & Gband of the Sunspot and surrounding structures
AR2767_HACaKGband_Animated_07272020.gif (3.47 MiB) Viewed 1235 times

Very best,


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by christian viladrich »

Hi Marty,
The 3-band animation is very interesting !


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by arnedanielsen »

Excellent collection of images in different wavelengths and the animation is just super cool!

Best regards,
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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by Montana »

Fabulous images Marty and that animation just tops it off :bow :hamster:

Alexandra


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by MalVeauX »

Thanks all,

Looks like something truly energetic is coming around the bend as of right now, it has a leading pore but the main spot is still masked behind the limb. It's magnetic region is significantly larger than AR2767's so this could potentially be a "great spot." Hope so! If it's truly "great" it may last the 10~12 day transit and make a 2nd appearance like the last great spot did? Would be nice!

Very best,


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Re: AR2767 in High Res II | HA, CaK, Gband Trifecta | July 27th 2020

Post by ffellah »

Top shots Marty !

Franco :bow


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