The 706nm TiO filter has been working overtime, with it's ability to produce top notch images in the worst of seeing conditions it promises to deliver the goods over and over again in this new solar maximum!
Images of the Sun, our local star, at a range of wavelengths with specialist solar telescopes. Imaging tutorials, solar bits and pieces for sale, talks and outreach with the Charlie Bates Solar Astronomy Project CBSAP.
Sunday, 17 April 2011
Ha Full Disk 16th April
I got what I consider to be one of my best ever Ha full disks yesterday. This is a 4 pane mosaic stitched together in IMerge. Apart from a slight uneveness in brightness it's pretty much near perfect. The image was taken with my DS40 @ f16 with DMK31 camera. Click on the image to open up in full size!
CaK Full Disk 16th April
I recently purchased a Baader K-Line CaK filter for ultra violet images of the sun. I'm in the process of making a hybrid filter using elements from a CaK PST to narrow the bandpass of the standard filter. I'm currently using ND3.8 film as the primary filter, though shortly are hoping to use this filter in conjunction with a bespoke Herschel wedge. Fingers crossed this is currently being assembled for me by an engineer in Italy. The plan will be to use this wedge to image solely at CaK wavelengths and should afford faster shutter speeds than i'm currently getting with this setup.
There is currently nowhere near the contrast achieved by the CaK PST, however by using the Baader K-Line and optical elements from the CaK PST should improve things considerably. I will then be able to use this setup with my 70mm and 127mm refractors and afford considerable improvement in resolution, without the 100mm CaK aperture limit imposed if I were to use a Lunt CaK wedge. As always, stay tuned for updates!
TiO full disk 16th April
The problem with a blog like this is that there can only ever be one picture at the top of the page! Now I have images coming in quicker than I can blog them as the weather gets better! This is a 4 frame mosaic taken with the 70mm frac at f9 using the 706nm TiO filter. At the moment we have a spotty sun and this shows it well.
Thursday, 7 April 2011
Full Disk Mosaic 706nm TiO
I decided to have a go at putting a 'proper' mosaic together for the first time using IMerge - I've done this in CS4 before, but this is a time consuming process and the results in my mind never warranted effort in.
This was constructed using the 70mm refractor @ f9, 706nm Tio filter and DMK31. 6 panes were taken and joined in IMerge.
I'm really pleased with the results - lovely and sharp! The transparency was variable, and as a result the image is maybe not as sharp as I know it could be across the disk as a whole, but for a first attempt i'm impressed!
This is one to click and view at maximum resolution, plenty to see!
Active Region 1184 @ 706nm TiO
This image was taken with a low altitude sun ~ 10 degrees through so high cloud, and given these conditions i'm really pleased with the results. There's plenty of detail visible in the umbra and penumbra, and the granulation is reasonably prominent too. I'm fairly confident that with a higher altitude sun, good transparency and seeing that the results will be considerably better. Taken with 127mm f17 706nm DMK31.
Active Region 1185
Close up here of AR1185 using the 127mm refractor at f17, 706nm TiO filter. Given the low altitude of the sun at the time the results are pleasing!
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