That's fantastic!!!
Where did you get that?
hydrogen alpha - 0.0 angstroms
Re: hydrogen alpha - 0.0 angstroms
They definitely had to work at it:
https://dubshen.astro.su.se/wiki/index.php/CRISP
https://dubshen.astro.su.se/wiki/index.php/CRISP
- Montana
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Re: hydrogen alpha - 0.0 angstroms
They have amazing seeing conditions, I need to move there
Alexandra
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Re: hydrogen alpha - 0.0 angstroms
This telescope vacuum tube and adaptive optics which uses real time wave front analyzer with closed loop. Therefore after the seeing reaches a certain level (say, 1,5") then the AO makes the image literally diffraction limited for such an aperture.
Without an AO you still need a lucky imaging technique (LIT). In general, if a local seeing is OK, then LIT can deliver the same level of detalization as an AO. LIT is a like "post-factum AO". If an AO corrects wave front defomations, the LIT just rejects too distorted image fragments.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.