A small active area in CaK on the 9th April

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robert
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A small active area in CaK on the 9th April

Post by robert » Mon Apr 09, 2018 7:15 pm

An unexpected clear spell with quite good seeing (1.5-2.0 SSM reading) so I had a look at the disc in CaK, ED80 with focal reducer. The tiny active area looked interesting so I added a x3 Barlow and did a sequence of images at 15 second cadence, 30 frames, 7.5 minutes. I wondered what was going on in white light as well so took the same sequence at the same magnification with ED80 and Lunt Herschel wedge and continuum filter. There is a small pore visible in the area.

I like the strange pulsing of the animated CaK image. Sorry, they are big files but will download if you wait.

Robert

Image0409 09_Apr_18_105332_lapl6_ap553 by robertarnold, on Flickr

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Image
Last edited by robert on Mon Apr 09, 2018 7:44 pm, edited 1 time in total.
images and animations http://tinyurl.com/h5bgoso
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
2017 images http://tinyurl.com/gvk9k3k
ED80. SW200. ES127. Celestron-150mm-PST mod
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Re: A small active area in CaK on the 9th April

Post by ffellah » Mon Apr 09, 2018 7:20 pm

Excellent images and animations, Robert. The granulation is awesome !

Franco

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Re: A small active area in CaK on the 9th April

Post by marktownley » Mon Apr 09, 2018 7:23 pm

These are excellent Robert! You've certainly been getting some clear skies lately - certainly more than me. I did have the Lunt50 set up earlier this morning and caught a few visuals of the emerging flux region where the clouds thinned momentarily. Lots of subtle movement going on in that calcium animation.
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Re: A small active area in CaK on the 9th April

Post by robert » Mon Apr 09, 2018 7:44 pm

Thanks Franco and Mark, lucky with the weather!
images and animations http://tinyurl.com/h5bgoso
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
2017 images http://tinyurl.com/gvk9k3k
ED80. SW200. ES127. Celestron-150mm-PST mod
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265

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Re: A small active area in CaK on the 9th April

Post by Valery » Tue Apr 10, 2018 3:32 am

Very nice animations! Thanks for sharing them with us.

BTW The pulsations, I am sure, are the mexture of the seeing and real changes on the sun.
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Re: A small active area in CaK on the 9th April

Post by Derek Klepp » Tue Apr 10, 2018 10:46 am

Well done Robert been having a quick visual in Ha here.

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Re: A small active area in CaK on the 9th April

Post by yltansg » Tue Apr 10, 2018 10:49 am

That was svery nice granulation animation.

Alfred

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Re: A small active area in CaK on the 9th April

Post by Montana » Tue Apr 10, 2018 4:02 pm

Wow! I love the calcium K animation, you can see the spicule bases waving around, that is beautiful! :bow :hamster: to get one image that clear in CaK would be a miracle for me ;)
Alexandra

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Re: A small active area in CaK on the 9th April

Post by eroel » Wed Apr 11, 2018 3:45 pm

Robert:
Beautiful shots, specially the last two.
Regards,
Eric.


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Re: A small active area in CaK on the 9th April

Post by MapleRidge » Wed Apr 11, 2018 5:13 pm

Excellent captures and animations Robert :bow

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Re: A small active area in CaK on the 9th April

Post by Carbon60 » Wed Apr 11, 2018 7:27 pm

Very nicely done, Robert.

I'd settle for just even seeing the Sun. More grey skies here.

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Re: A small active area in CaK on the 9th April

Post by Ronnie_Clayton » Wed Apr 11, 2018 11:59 pm

Incredible images Robert, the granulation is amazing!

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