March Solar Challenge

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March Solar Challenge

Post by Montana »

Let's look for Calcium K / H prominences this month, and if possible take an image of the same proms in Hydrogen alpha too. It would be nice to have a collection of comparison images to see what differences we can see between the two lights.

Also include any tips on imaging the CaK/H proms to help others too :)

Alexandra


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Re: March Solar Challenge

Post by DeepSolar64 »

Phooey....I can't do CaK :-( . Maybe I can find sources online. KSO's CaK images doesn't show proms. :-I


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Re: March Solar Challenge

Post by marktownley »

Gimme some sun and i'll have a go!

By that I mean I need the clouds to go away! :lol:


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Re: March Solar Challenge

Post by eroel »

Hi:
Got some FD´s on the 6th of March of this year, so I am loading a CaK FD, taken with the 102mm f/9 Meade refractor, fitted with a CaK modification made from my old CaK PST, and also an Ha FD taken with the Solarmax 90-DS-BF30.
I recorded with the same camera SKYnyx 2-2 and each FD was made with a prominence one and a "surface" one, later composed in one set with PS.
Then used the AS!3 to align and stack 25% of 600 frames on each recording, and then used Registax6 for wavelets and to get a semifinal frame to compose with the other one.
Hope it helps.
Regards,
Eric.
Sol del 6 de marzo del 2022-Meade- CaK-PSTmod-1az-pos.jpg
Sol del 6 de marzo del 2022-Meade- CaK-PSTmod-1az-pos.jpg (781.85 KiB) Viewed 1413 times
Sol del 6 de marzo del 2022-Solarmax 90-DS-BF30-1az-posi.jpg
Sol del 6 de marzo del 2022-Solarmax 90-DS-BF30-1az-posi.jpg (639.07 KiB) Viewed 1413 times


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Re: March Solar Challenge

Post by Montana »

Thanks Eric, there are significant differences in shape between the two lights with all of the prominences. About how far apart in time were these taken? If very close, it would be interesting to overlay these two images with a different colour and compare.

Alexandra


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Re: March Solar Challenge

Post by TareqPhoto »

I really wish :(


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Re: March Solar Challenge

Post by DeepSolar64 »

TareqPhoto wrote: Tue Mar 08, 2022 12:50 pm I really wish :(

Yeah. It takes a really good ultra narrowband CaK filter or SHG to show them. DayStar’s CaH Quark will show them too.

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Re: March Solar Challenge

Post by TareqPhoto »

DeepSolar64 wrote: Tue Mar 08, 2022 3:03 pm
TareqPhoto wrote: Tue Mar 08, 2022 12:50 pm I really wish :(

Yeah. It takes a really good ultra narrowband CaK filter or SHG to show them. DayStar’s CaH Quark will show them too.

James
I am very new to this all solar imaging anyway, so i will leave all challenges for future if i am still alive and at it.


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Re: March Solar Challenge

Post by DeepSolar64 »

TareqPhoto wrote: Tue Mar 08, 2022 3:44 pm
DeepSolar64 wrote: Tue Mar 08, 2022 3:03 pm
TareqPhoto wrote: Tue Mar 08, 2022 12:50 pm I really wish :(

Yeah. It takes a really good ultra narrowband CaK filter or SHG to show them. DayStar’s CaH Quark will show them too.

James
I am very new to this all solar imaging anyway, so i will leave all challenges for future if i am still alive and at it.

Agreed. Me too!!


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Re: March Solar Challenge

Post by eroel »

Alexandra:
There is a 3 hour difference in the Ha image and the CaK image, because I first record with the Solarmax in Ha, then I just change the camera as it is to the 102mm f28 Ha HR recording and lastly I do the Cak recording with the 102mm f/9 Meade refractor, because I have to change the extenders and filters of the camera to do it.
What I will try, is to take the CaK recordings just after the Solarmax Ha ones and lastly the HR setup.
I don´t know how to make the overlay you mention. :oops:
Best regards,
Eric.


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Re: March Solar Challenge

Post by eroel »

Terry and James:
I do not remember the optical tests I made, so to check all my small refractors correction to the CaK frequency, but remember that the Meade won, so I used it with the PST CaK modification I made.
Good day.
Eric.


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Re: March Solar Challenge

Post by rigel123 »

Here is a mediocre go at combining Eric's images with the blue showing CaK and red showing where some HA was but no CaK. If the prom is blue then HA and CaK overlapped. This might be interesting with closeups done close together. I simply layered the HA over the CaK after colorizing them and removing the HA disk and then combined as difference.
Erics-CaK-HA.jpg
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Re: March Solar Challenge

Post by DeepSolar64 »

WoW!! Color really adds to Eric’s monochrome image!!


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Re: March Solar Challenge

Post by Montana »

Well done Warren!! that's exactly the kind of thing I was meaning :hamster:

Alexandra


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Re: March Solar Challenge

Post by Carbon60 »

Great comparison. Teamwork…… ;)

Stu.


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Re: March Solar Challenge

Post by DeepSolar64 »

Carbon60 wrote: Wed Mar 09, 2022 2:52 pm Great comparison. Teamwork…… ;)

Stu.

Yes, we all benefit from each others data in our efforts on learning about our Sun and enjoying our hobby.


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Re: March Solar Challenge

Post by marktownley »

Here's my contribution from the 20th...

Imagedeaprting-active-region-CaK-50mm-f26-290mm-bw by Mark Townley, on Flickr

ImageDeparting-AR-DS90-290mm-bw by Mark Townley, on Flickr


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Re: March Solar Challenge

Post by marktownley »



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Re: March Solar Challenge

Post by Montana »

These are really great Mark!! do know the time difference between the two pairs?

Like Eric, I found that the time difference is very long before I could swap out the filters. I have also found that my Lunt wedge vertical flips the image so I imaged some proms at the top of the Sun in CaK and the bottom on the H-alpha (small scream).

Alexandra


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Re: March Solar Challenge

Post by marktownley »

Montana wrote: Wed Mar 23, 2022 7:14 am These are really great Mark!! do know the time difference between the two pairs?
The Ha were shot maybe 45mins - 60mins after the CaK (ish?)


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Re: March Solar Challenge

Post by Montana »

Calcium K - Lunt CaK wedge (100mm)
Hydrogen alpha - Solarscope DSF100
2x Barlow / ASI174

Image2022-03-26 prom comp south combo colour by Alexandra Hart, on Flickr

Image2022-03-26 prom comp North east combo by Alexandra Hart, on Flickr

Image2022-03-26 prom comp east combo colour by Alexandra Hart, on Flickr

Image2022-03-26 prom comp south east colour combo by Alexandra Hart, on Flickr


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Re: March Solar Challenge

Post by rigel123 »

Those are great Alexandra!


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Re: March Solar Challenge

Post by DeepSolar64 »

WoW!! Awesome!! 👏


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Calcium Proms!

Post by Carbon60 »

Finally, some calcium proms. These are the first I've managed to capture for months and months....and on the last day of the challenge too :)

Image20220331_CaK_Prom1_Colour by Stuart Green, on Flickr

Image20220331_CaK_Prom2_Colour by Stuart Green, on Flickr

It took quite some tweaking to capture these without blowing out the background.

Thanks for looking.

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Re: March Solar Challenge

Post by DeepSolar64 »

Nice work Stuart. They look like this a lot in the GONG images too. The big one reminds me of a suspension bridge.


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Re: March Solar Challenge

Post by Ibbo »

I know they are from April -just

Image


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Re: March Solar Challenge

Post by DeepSolar64 »

April 1st, Steve?


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Re: March Solar Challenge

Post by Montana »

Wow!! that is a fabulous presentation Steve :bow :hamster:

Alexandra


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