Ca-H full disc of Sept. 13th

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krakatoa1883
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Ca-H full disc of Sept. 13th

Post by krakatoa1883 » Thu Sep 13, 2018 10:21 am

Just a full disc today, there is little to see on the chromosphere and nothing on the photosphere apart some facular zones. I noticed some prominences in calcium light but sky is hazy today and images would be too noisy. I also add an image of AR12721 taken on Sept. 10th before the group lost all of its spots.

After some tests I decided not to use anymore of IMPPG for processing calcium images, I have the impression that it likely generates small scale artifacts, for the below image I used of IRIS instead.
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2018-09-10-1443-RB-CaH-AR12721.jpg
2018-09-10-1443-RB-CaH-AR12721.jpg (85.52 KiB) Viewed 562 times
2018-09-13-0830-RB-CaH-fulldisc.jpg
2018-09-13-0830-RB-CaH-fulldisc.jpg (99.65 KiB) Viewed 567 times
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Re: Ca-H full disc of Sept. 13th

Post by Montana » Thu Sep 13, 2018 11:15 am

I agree, I don't use IMPGG for CaK either. I have never really settled on what I like but AstraImage is what I usually turn to. I find IMPGG seems to create tiny dots which I am not sure is correct. I try to study the video as close as I can, then try and replicate what you see in processing, the eye never lies and is usually the best judge.

These are excellent photos :bow
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Re: Ca-H full disc of Sept. 13th

Post by ffellah » Thu Sep 13, 2018 11:20 am

Lovely images, Raf

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Re: Ca-H full disc of Sept. 13th

Post by p_zetner » Thu Sep 13, 2018 9:11 pm

Nice images, Raf.

I agree about ImPPG. I'm always worried it leaves small scale artifacts with CaK. I use ImagesPlus .. very slow but, I think, more reliable deconvolution.

Cheers.
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Re: Ca-H full disc of Sept. 13th

Post by krakatoa1883 » Fri Sep 14, 2018 5:34 pm

Thanks everyone.

I never used ImagesPlus, I'll try, thanks Peter for your suggestion.
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Re: Ca-H full disc of Sept. 13th

Post by eroel » Sat Sep 15, 2018 5:47 pm

Raf:
Beautiful images.
Regards,
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Re: Ca-H full disc of Sept. 13th

Post by marktownley » Sun Sep 16, 2018 7:55 pm

Good shots Raf!
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