AR12741 at it's full opening in H-a and CaK high resolution with C11 and C8 scopes.
Posted: Fri May 17, 2019 2:04 am
Hi all,
Early morning May 11 was a nice calm and warm with a light wind from the east. I knew, in a warm season this means - very probably the seeing will cooperate. And it does!
Here is the AR12741 in Ha in it's full glory, at full opening near the center of the sun disk.
Telescope used is C11 280mm F/10 SCT equipped with the ARIES 295mm full size dielectric energy rejection filter, H-a etalon - QUARK Chromosphere, 0,5x GSO reducer with shortened working distance and the ACA Basler 1920-155 camera. This imaging rig worked nicely for me.
4000 frames were recorded with Firecapture 2.62 and then 3000 of them were staked and processed with AS!2, AstarImage 3.0 Pro and PS CS6.
The seeing deteriorated in minutes and for imaging in UV in CaK line I were need to use a smaller aperture telescope - my old C8 203mm F/10 SCT. It was equipped with the ARIES 214mm DERF which transmits CaK too, a CaK filter and barlow lens. Camera was the same - Basler 1920-155.
Here is an image of the AR12741 in CaK. It seems that CaK worked somewhat off-band.
Right click on the images and choose to open them in a separate window - to them in a full resolution.
Thanks for looking and comments.
Valery.
Early morning May 11 was a nice calm and warm with a light wind from the east. I knew, in a warm season this means - very probably the seeing will cooperate. And it does!
Here is the AR12741 in Ha in it's full glory, at full opening near the center of the sun disk.
Telescope used is C11 280mm F/10 SCT equipped with the ARIES 295mm full size dielectric energy rejection filter, H-a etalon - QUARK Chromosphere, 0,5x GSO reducer with shortened working distance and the ACA Basler 1920-155 camera. This imaging rig worked nicely for me.
4000 frames were recorded with Firecapture 2.62 and then 3000 of them were staked and processed with AS!2, AstarImage 3.0 Pro and PS CS6.
The seeing deteriorated in minutes and for imaging in UV in CaK line I were need to use a smaller aperture telescope - my old C8 203mm F/10 SCT. It was equipped with the ARIES 214mm DERF which transmits CaK too, a CaK filter and barlow lens. Camera was the same - Basler 1920-155.
Here is an image of the AR12741 in CaK. It seems that CaK worked somewhat off-band.
Right click on the images and choose to open them in a separate window - to them in a full resolution.
Thanks for looking and comments.
Valery.
