X 1.9 Flare
Taken by Laurie Sibbald on January 9, 2023 @
Cypress County, Alberta
Click photo for larger image
| |
Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: Unavailable
|
|
| More images
Details:
Since we knew the sun has been "cranky" with several large active regions now visible, I thought it would be good to see what was going on yesterday. Typically we take 3000 to 5000 frame videos and stack 3 to 10 percent of them to process further. We started out with that intention yesterday but yesterday was not typical. After capturing two other regions, I slewed to AR 3184.
When the scope went to AR 3184, the X class flare was just starting, but the flare image was blown out (as evidenced by the imaging histogram and the large bright region on the camera I saw. At first I thought there was something wrong with the camera. I lowered the exposure from 10ms to 5 ms which brought the histogram in and could see that it was a flare and not an artifact or camera problem.
We can select a Region of Interest (ROI) to increase the frame rate and more isolate a target sunspot region. For this shot we achieved about 12 frames per second. It is part of a longer video but the portion shown was 10 percent of 220 frames or 22 frames - 19 or so seconds in duration. We chose that to get some flare definition since it was changing rapidly, but needed at least a few frames to stack. We have more data from later in the flare, but this is the shot closest to the flare peak.
We didn't know what we had but later we saw on-line that it was close to an historic X class flare and that it coincided with other flares around the sun.
Photographer's website:
https://sevenskiesastro.com
|
|
|
