Sunday Sun March 24th '19

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Sunday Sun March 24th '19

Post by Carbon60 »

A frustrating morning with only relatively short gaps between the gathering cumulus clouds, but the air was clear and the seeing conditions were pretty good. I spent more time waiting than capturing images, but managed a few with my various scopes and cameras.

AR2736 is getting really close to the limb. I was just grateful that the Sun came out today at all before losing the active region altogether.

First off a CaK FD in Mono and Colour:

Image20190324_Ca_FD by Stuart Green, on Flickr

Image20190324_Ca_FD_Colour by Stuart Green, on Flickr

The bottom edge is a bit soft because of camera tilt. Completely unnecessary in CaK, but I had my home brew tilt adaptor fitted to the nose of the Basler. I must remember to remove this next time.

The active region looks superb, with lots of little bright points around the core.

Image20190324_2_Ca_AR2736 by Stuart Green, on Flickr

Here is the same region in colour but using my Basler acA1920-155um with IMX174 sensor. The closer apparent view and faster frame rate has captured some of the finer structures above the AR together with what appears to be a fine streamer/prom.

Image20190324_Ca_AR2736_Colour by Stuart Green, on Flickr

An inverted coloured view.

Image20190324_Ca_AR2736_Inverted_Colour by Stuart Green, on Flickr

Over to the red end and a close view of flaring AR2736 in hydrogen alpha. The extreme brightness of this region made it difficult to get a suitable level of exposure across the frame without burning out the AR too much.

Image20190324_Ha_AR2736 by Stuart Green, on Flickr

Finally an inverted view of the same region using HDR to enhance the proms above the active region. Not the best image as processing was a bit 'pants'.

Image20190324_2_Ha_AR2736 by Stuart Green, on Flickr

An alternative view.....

Image20190324_3_Ha_AR2736 by Stuart Green, on Flickr

I did try a full-disk Ha, but struggled to get any reasonable contrast.... again more waiting than imaging between the clouds. Nothing came out worth showing.

Thanks for looking.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sunday Sun March 24th '19

Post by ffellah »

Very exciting close-ups and images, Stu.

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Re: Sunday Sun March 24th '19

Post by Astrophil »

All excellent images, Stu. The inverted CaK is especially interesting to me.

Phil


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Re: Sunday Sun March 24th '19

Post by marktownley »

Excellent set of images Stu! Was lovely and blue today for me but the seeing wasn't up to much sadly. The new `127 looks to be a good performer in CaK.


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Re: Sunday Sun March 24th '19

Post by Montana »

Wow!!! your CaK are so sharp :bow :bow :bow I have never seen anything like this through my Lunt on any of my scopes :bow
Not envious honest :)

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Re: Sunday Sun March 24th '19

Post by MAURITS »

Very nice images and great closse-ups Stu.


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Re: Sunday Sun March 24th '19

Post by eroel »

Stu:
Superb images, clean and sharp, specially the CaK.but also spectacular Ha ones too.
Best regards,
Eric.


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Re: Sunday Sun March 24th '19

Post by Carbon60 »

Many thanks everyone.

I’m finally happy with my CaK setup using the Lunt B600, Baader K-line and Omega stack.
The biggest issue I have right now is getting good contrast though my Lunt60 for Ha FDs.

Cheers

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sunday Sun March 24th '19

Post by krakatoa1883 »

These are really fantastic images, Stu, the CaK is superb.


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