Yesterday morning the seeing seemed to be good. The Sun revealed a great number of details in the PST. There where filaments, prominences, plage's, and active regions visible. I also had a chance to use a wide array of eyepieces ranging from 20mm to 5mm (all Vixen Lanthanums. The different views were fascinating. I also shot some images with the Nikon Coolpix 4500, which I include in this observing report. I also fiddled around with adjusting the images in different colour channels. It produced some interesting results that form a base for future improvements.
This sketch should give you a general idea where the different features where situated on the solar disk.
1. Three large QRF’s (Quiet Region Filaments)
2. Active region 791 with a sunspot and two plage’s (white areas around Sunspot)
3. Active region 792 appearing at the limb of the Sun with bright plage
4. Big prominence, probably an active Class II eruptive (from Zirin classification)
5. Large hook shaped prominence.
The first two images where shot with a 10mm eyepiece and 2x optical zoom, 1/4s, f 10.3, ISO 100. The first image is the original image, slightly altered with some level adjustment and unsharp masking. Two filaments and the big prominence (4 on the sketch) are visible as well as the brighter area of Active Region 792 on the limb of the Sun (about 1 o’ clock). The second image shows only the green channel from the first image. The prominence disappears but the surface features are much better visible.
The next image shows a large part of the Sun, again only in the green channel. The original image was shot with a 12mm eyepiece, no optical zoom, 1/30s, f 6.6, ISO 100. Again some unsharp masking and level adjustments have been applied. On this image you can see the three filaments and at the bottom centre active region 791, a sunspot with some bright plage’s above and to the right.
The last image shows the big prominence. This image is an RGB one, but I split the colour channels, did some level adjusting, unsharp masking and curves adjustment only in the red channel, before merging the three channels together again. This produced a more or less realistic image of the big prominence, but a lot of testing and training has to be done. However, this being the first images shot through the Coronado PST, I am very satisfied. If you want to comment on the images or have some more tips for me, please feel free to do so! You just have to register once and you can always log into the comment fields.
Clear skies to all of you!
UPDATE friday 29 July 2005 at 14.00 hrs UT !!!!!
At the moment there is a big prominence visible as well as the active region AR 792. Here are some images from some two hours ago (click to enlarge!)
Enjoy the images for now. Details on the images will follow within the next few days. I will keep you updated.
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Posted by
Math on 07/29 at 03:50 AM |
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