Saturdays C-Class Flare CaK Animation - 30th May
- marktownley
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Saturdays C-Class Flare CaK Animation - 30th May
Saturday morning dawned clear, but with lots, and lots! of contrails that all got super broad super quick, filling the sky in a milky haze. I wasn't optimistic at all if i'm being honest, but it was the best I was going to get over the bank holiday weekend with Sunday and Monday forecast cloud and rain.
I started off with the 100/800 APM scope stopped down to 80mm, as that was my finger in the wind in terms of seeing given the conditions. It turns out I was pretty spot on, and I think if i'd used 100mm aperture the frames wouldn't have turned out. Using the Airylab 2.7x telecentric to get the scope up to f27, and the ZWO290mm camera, I find if i've got the aperture right for the seeing then this is a combination with real synergy.
The haze was thick, and I had to increase exposure time to 10ms (much longer than I like) and had to crank the gain up to around 40% (which is also higher than I like!) to get a decent histogram. But. imagine my surprise when I scooted around the disk for a target and found a flare happening just off the limb. Seeing these things before I decided to run a timelapse, and ran off 19 frames between 07.31ut and 07.48ut. On reflection I should have probably ran off a few more, but I wasn't convinced with the haze it wouldn't be any good. Looks like I was wrong and the result turned out OK!
CaK-ani-wide-bw by Mark Townley, on Flickr
CaK-ani-wide-colour by Mark Townley, on Flickr
Has been ages since I bagged a flare, and a while since been able to do an animation!
Hope you like.
Mark
I started off with the 100/800 APM scope stopped down to 80mm, as that was my finger in the wind in terms of seeing given the conditions. It turns out I was pretty spot on, and I think if i'd used 100mm aperture the frames wouldn't have turned out. Using the Airylab 2.7x telecentric to get the scope up to f27, and the ZWO290mm camera, I find if i've got the aperture right for the seeing then this is a combination with real synergy.
The haze was thick, and I had to increase exposure time to 10ms (much longer than I like) and had to crank the gain up to around 40% (which is also higher than I like!) to get a decent histogram. But. imagine my surprise when I scooted around the disk for a target and found a flare happening just off the limb. Seeing these things before I decided to run a timelapse, and ran off 19 frames between 07.31ut and 07.48ut. On reflection I should have probably ran off a few more, but I wasn't convinced with the haze it wouldn't be any good. Looks like I was wrong and the result turned out OK!
CaK-ani-wide-bw by Mark Townley, on Flickr
CaK-ani-wide-colour by Mark Townley, on Flickr
Has been ages since I bagged a flare, and a while since been able to do an animation!
Hope you like.
Mark
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Superb, Mark. Simply awesome
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Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Excellent capture and, going by your story, a true lucky capture!
Call me Geoff.
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Doesn't mean I know what I'm doing, though!
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Doesn't mean I know what I'm doing, though!
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- marktownley
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Thanks everyone! I also got these closeups, same kit 80mm f27 290mm, not quite as dramatic as the flare though
ar13001-CaK-80mm-f27-290mm-bw by Mark Townley, on Flickr
ar13001-CaK-80mm-f27-290mm-colour by Mark Townley, on Flickr
AR12998-CAk-80mm-f27-290mm-bw by Mark Townley, on Flickr
AR12998-CAk-80mm-f27-290mm-colour by Mark Townley, on Flickr
I think I got it right in terms of the seeing to image at 80mm aperture; the penumbral fibrils are just about resolved, the images above are the best of the batch, and the discarded ones don't show the fibrils resolved. The APM100/800 is a good performer in CaK, and if you are interested how it compares to the much cheaper Tal, check out this thread viewtopic.php?f=10&t=35925
ar13001-CaK-80mm-f27-290mm-bw by Mark Townley, on Flickr
ar13001-CaK-80mm-f27-290mm-colour by Mark Townley, on Flickr
AR12998-CAk-80mm-f27-290mm-bw by Mark Townley, on Flickr
AR12998-CAk-80mm-f27-290mm-colour by Mark Townley, on Flickr
I think I got it right in terms of the seeing to image at 80mm aperture; the penumbral fibrils are just about resolved, the images above are the best of the batch, and the discarded ones don't show the fibrils resolved. The APM100/800 is a good performer in CaK, and if you are interested how it compares to the much cheaper Tal, check out this thread viewtopic.php?f=10&t=35925
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Fantastic flare animation and great write-up comparing the Tal to the APM..nice one mark
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Great animation Mark, it really did turn out well despite the conditions you described!
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Re: Saturdays C-Class Flare CaK Animation - 30th May
First CaK animation of a flare I see, very well done Mark ! The stills are great too. The 100mm f/27 stopped down is working well for you.
Franco
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- marktownley
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Thanks everyone! The only thing left from the session was the full disk
Cak-FD-60mm-f16-ICX814-bw by Mark Townley, on Flickr
Cak-FD-60mm-f16-ICX814-colour by Mark Townley, on Flickr
Cak-FD-60mm-f16-ICX814-bw by Mark Townley, on Flickr
Cak-FD-60mm-f16-ICX814-colour by Mark Townley, on Flickr
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Re: Saturdays C-Class Flare CaK Animation - 30th May
Excellent images and animation.
I hope to capture the sun flares or prominence some days.
I hope to capture the sun flares or prominence some days.