More solar imaging

Blog the previous nights viewing. Link to images on the gallery or simply describe what you observed the night before. Leave the technical and howto in another forum.
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rwilkinson
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More solar imaging

Post by rwilkinson » Sun Sep 11, 2016 3:46 pm

This morning I spotted a large solar prominence through my Lunt solar-scope, so this afternoon I had a go at imaging it (with an old Philips mono webcam).
It was tricky to catch a long enough gap in the clouds to capture a pair of image-sequences (one at low gain, to get the detail on the disk and then one with a higher gain for the fainter prominence), but I did manage it twice within an hour and a half.
And it's interesting to see how much the view had changed over that interval:
sun_11sep_1315.jpg
The prominence at 2:15pm
sun_11sep_1315.jpg (131.07 KiB) Viewed 3421 times
sun_11sep_1430.jpg
Another view from 3:30pm
sun_11sep_1430.jpg (118.82 KiB) Viewed 3421 times

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rwilkinson
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Re: More solar imaging

Post by rwilkinson » Sun Jul 09, 2017 3:40 pm

On the few occasions this year that I've set up my Lunt solar telescope, the solar activity has been very sparse. :(

However this weekend I saw an active sunspot group plus a large prominence, so I plugged in an old Philips webcam to try some imaging.
I captured two sets of 400 frames (1/2500-sec for the disk detail and 1/500 for the fainter prominence), and stacked each using the AutoStakkert program.
Then for a change I used the ImageJ program, which can read the 32-bit FITS files directly and is much better for overlaying (rather than adding) a pair of images than IRIS.
sun_20170709_1447.png
Solar activity on 9-July-2017. From 800 frames using Philips (mono) TouCam on Lunt 35S.
sun_20170709_1447.png (307.58 KiB) Viewed 2512 times

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