CaK filaments/ filaprom from 20th Nov 2021

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CaK filaments/ filaprom from 20th Nov 2021

Post by Merlin66 »

My usual DIY CaK filter has a bandwidth of 1A just to the blue side of the CaK CWL.
The images today are as usual - reasonable seeing, spots visible etc.
100401.jpg
100401.jpg (283.35 KiB) Viewed 606 times
A MiniSHG CaK image has a bandwidth around 0.2A ( :shock: ) and can be placed exactly on the CaK CWL.
94322.jpg
94322.jpg (443.8 KiB) Viewed 606 times
The MiniSHG shows the extensive wispy filaments (around 7 o'clock) and a filaprom (around 1 o'clock)
On this occasion the MiniSHG came out best!!! :band
A couple of close up CaK DIY filter images:
100232.jpg
100232.jpg (378.61 KiB) Viewed 606 times
100619.jpg
100619.jpg (301.16 KiB) Viewed 606 times
I'd be interested to see some other CaK images from the Lunt filter for comparison.


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by DeepSolar64 »

WoW, that SHG does really well. I have seen prominences before in Calcium II K images but I don't ever recall seeing filaments. Nice work!!

James


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by EGRAY_OBSERVATORY »

These are really excellent images Ken and of course you are at the best-end of the Solar-viewing year, but superb images showing so much detail.

I would lend you my Lunt CaK filter, but you are a tad too far away and up here the Sun is slipping lower and closer to the horizon for me to get a decent comparison to you via S.C. (which would be much cheaper than air-travel etc.).

Thanks for sharing
Terry


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by DeepSolar64 »

I just wish I had a CaK filter to begin with. I would certainly image with it from time to time but I would use it visually with a monitor, of course.

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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by AndiesHandyHandies »

Hi

Great image with the miniSHG.

Eds Sills is giing one away in the UK, as I recall being told if anyone is interested, big project.

Cheers. Andrew.


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by torsinadoc »

That is really impressive image with the miniSHG.


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by Martin_S »

Ken, here is a Cak image taken with my Lunt module on the 19th. there was a lot of filament activity on that day that I captured in Ha, they were not visible in Cak.
Your mini SHG is getting amazing results ,well done

Martin.
Cak 19-11-21.jpg
Cak 19-11-21.jpg (290.18 KiB) Viewed 575 times
H-alpha_083619_lapl4_ap28417.jpg
H-alpha_083619_lapl4_ap28417.jpg (160.38 KiB) Viewed 575 times


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by marktownley »

Very nice images Ken, but particularly with the mini SHG.


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by John »

Great to see your miniSHG is showing filaments in CaK.

John


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by Carbon60 »

Superb SHG results, Ken. It just shows what we're missing with regular CaK filters.

Stu.


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Re: CaK filaments/ filaprom from 20th Nov 2021

Post by Montana »

Wow!! wow and wow!!! these are the best Ken :bow :bow :hamster:

Alexandra


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