Search the Community
Showing results for tags 'solar activity'.
Found 3 results
I reside in the central great plains of the United States, and recently our west coast has been set on fire by rioters and arsonists due to civil unrest. The smoke from these residential homes and forests burning, is delivered high into the atmosphere where it hit the jetstream and has traveled well over 1000 miles to blanket my sky. While i can still take some images, it has greatly reduced my session quality at 393nm. Naturally the smoke properties absorbes or reflects much of this wavelength. The sun is very white in the sky in fact, white as a cotton ball in some areas. However, i am vigilant in my attempt to capture something out of the new active region. Please be patient while this data is processed. First we have a look here at the paris meudon bass2000 spectroheliograph , which records its daily calcium k3 core full disc. I have added an arrow to the tiny area that my scope is focused on at about 2400mm.. Full image disc citing goes to paris meudon observatory, with corresponding link to the wonderful and most vital French institution. http://bass2000.obspm.fr/home.php Next from my telescope, operting with an explore scientific Firstlight 127mm x 1200mm achromat. In the focuser is a Skybender tilt module with some calcium filters supplied by Apollo Lasky. I am using a Meade 2x telenegative barlow in the eyepiece of the skybender, and a basler aca1920-155um cmos camera for recording. Look at those calcium ribbon's! This is a rare capture, seldom seen since cycle 24, a decade ago.
After the break to the mountain which I have dedicated to elaborate a bit of the material filed in time, I can finally go back to photograph. 22th morning, the sky would be especially transparent and clean, thanks to the storm of the night and although the meteo told about terrible seeing I wanted to try anyway due to the presence of some beautiful formations on the Sun. To my surprise the turbulence was almost absent at the begining, and I could capture sequence of images tho assemble the mosaics, but these are enough to exhaust the lucky seeing, and when I was setting the camera for the timelapse I already saw the first signs of deterioration which are then fulfilled during the shooting sequence. I tried to continue anyway stopping after just over an hour, even after a couple of hours I didn't see any improvements so I decided to dismantle everything and see what I could pull out of the collected material. In fact, this time, since next to one of the brightest prominences were visible a few spots and filaments, I wanted to try a totally different settings that allowed me to capture both the prominence that the details on the disk, which is always tricky with narrow filters. If it will happen again I'll have to keep exposure times longer to have more data on the weak details; in post processing then I had to study a totally different approach and I have had to duplicate each frame in order to be treated differently the disk and prominence starting from the same shoot. A faster method would be to work on shadows and light but noticing a loss of some points on the histogram I have taken the long way and hardworking. Since then the highly variable seeing I had to change the stacking and the final processing to try to normalize the level of detail as much as possible, I must admit that it was a work particularly long, because I has precluded the use of certain macros that usually use. Although at the end of the capture there weren't any cataclysmic events the level of detail at full resolution is good and if you focus on portions of the video and not only to the overview, you can see micro movements and evolutions. In particular I'm curious about the migration of certain points of greatest intensity next the main spot group NOAA 1820 more visible in the negative version, I usually think about Ellerman bombs but this ones were moving from the umbra and follow the filament/spicules and makes me wonder if by chance it is not a case of those phenomena recently discovered by UCLan university and still under study, in which they occur condensations of energy along the magnetic field of the spicule / filaments which radiate from sunspots by traveling in their length. Unfortunately the compression of Youtube has mixed some of the details but I hope you will enjoy it anyway. Youtube Channel
The day after I received my new camera the Sun gave the show with this huge prominence, and although I eventually had several driver issues, I managed to follow its evolution for half an hour before the sky completely veiled. I hope you will enjoy. At the end uninstalling the 13.1.7 drivers and installing the 13.1.6 High Performance Driver seems to have solved the high instability of the camera, which freezed each time. There remains the problem of newton interference bands. I forgot, here you can instead see the mosaics that I made before the timelapse, during the tests. http://www.flickr.co...lvy/9332248461/ http://www.flickr.co...lvy/9332248765/ http://www.flickr.co...lvy/9335037034/ PS - last week I forgot to post the video of the most spectacular events, here it is.