GREGOR Solar Telescope
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GREGOR is a solar telescope, equipped with a 1.5-metre primary mirror,[1] located at 2,390 m altitude at the Teide Observatory on Tenerife in the Canary Islands. It replaces the older Gregory Coudé Telescope and was inaugurated on May 21, 2012.[2][3] First light, using a 1-metre test mirror, was on March 12, 2009.[4][5]
GREGOR is the third-largest solar telescope in the world, after the Big Bear Observatory and the McMath-Pierce solar telescope. It is aimed at observing the solar photosphere and chromosphere at visible and infrared wavelengths. GREGOR sports a high-order adaptive optics (AO) system with a 256-actuator deformable mirror and a 156-subaperture Shack-Hartmann wavefront sensor. Efforts are underway to implement multi-conjugate AO in 2014.[6][needs update]
2020 upgrade
[edit | edit source]Initial astigmatism was fixed during an upgrade with some corrective optics: two off-axis parabolic mirrors.[7]
See also
[edit | edit source]- Vacuum Tower Telescope – Solar telescope on Tenerife operated by KIS
- Swedish Solar Telescope – Telescope on La Plama, Canary Islands
- Dutch Open Telescope – Solar telescope in the Canary Islands
- Roque de los Muchachos Observatory – Astronomical observatory on La Palma, Canary Islands
- List of solar telescopes
References
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- ^ First light was obtained with a 1-meter test-mirror due to manufacturing issues with the main mirror
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- ^ Europe's largest Solar Telescope GREGOR unveils magnetic details of the Sun Sept 2020
Sources
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