I like this image – Calcium H filter – I used Astra Image software to do a little processing. This is a single image – my attempts at stacking went wrong……
What I really like is the white areas around the sunspot that are shown with a calcium filter are visible here.
I followed the advice of the team at the RAG mid-monthly meeting last night and came out reasonably early whilst sky still had reasonable seeing – image taken at 09:46.
See also the later post below also about today’s images – the analysis in the post below demonstrates that what I initially thought were dust bunnies on the image were in fact real!
Sunspot – Calcium H filter – from Lichfield – colourised and further processing – 13/4/2019
Above with PIPP and Astro Photo – below with GIMP2 – demonstrates that the image is also showing the central bar that is forming in the sunspot and which can be seen on the hydrogen alpha images on spaceweather such as http://spaceweathergallery.com/indiv_upload.php?upload_id=153017
Few prominences this morning so as conditions were good, concentrated on AR2738 with various barlows.
Click on the second image to get the animation.
plenty surface action, the small spots have become more obvious, Nick.
Very surprised to getting even more solar action. A huge arc of plasma floated free way above the limb, this together with proms gave plenty to observe. The whole disc showed surface activity.
Using a green and polarising filter with the Herschel wedge at x65, the spot gave a really spiked edge. This came and went with the seeing , but settled, never noticed these spikes before. Again , a lovely day to set up and return , under clear skies ! Nick.
Good show still from AR2738 and some prominences.
Just out of interest, I did an approximate foreshortening correction on AR 2738 to see if it added any insight. Looks like it is still growing a bit.A good opportunity for anyone with Ca-K filters or whatever?
What a wonderful day to set up and watch the developments,
Here’s hoping for more ! Nick.
Good show from AR2738 and some prominences.
Only got a chance for a white light image today due to all the cloud. Still,some plages are visible as well as a nice penumbra.