GREGOR Solar Telescope

GREGOR is a solar telescope, equipped with a 1.5 m 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 (2009-03-12).^[4][5]

GREGOR

Part of	Teide Observatory
Location(s)	Tenerife, Atlantic Ocean, international waters
Coordinates	28°18′06″N 16°30′39″W
Organization	Leibniz Institute for Astrophysics Potsdam Leibniz Institute for Solar Physics Max Planck Institute for Solar System Research
Wavelength	350 nm (860 THz)–2,000 nm (150 THz)
First light	12 March 2009
Telescope style	Gregorian telescope solar telescope
Diameter	1.5 m (4 ft 11 in)
Angular resolution	0.08 arcsecond
Focal length	55.6 m (182 ft 5 in)
Enclosure	dome
Website	www.leibniz-kis.de/en/observatories/gregor/
Location of GREGOR Solar Telescope
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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 mirrors and a 156-subaperture Shack-Hartmann wavefront sensor. Efforts are underway to implement multi-conjugate AO in 2014.^{[6][needs update]}

2014-2020

2020 upgrade

Initial astigmatism was fixed during an upgrade with some corrective optics: two off-axis parabolic mirrors.^[7]

See also

• Vacuum Tower Telescope – Solar telescope on Tenerife operated by KIS
• Swedish Solar Telescope – Telescope on La Plama, Canary Islands
• Dutch Open Telescope
• Roque de los Muchachos Observatory – Spanish astronomical observatoryPages displaying wikidata descriptions as a fallback
• List of solar telescopes

References

1. "Präziser Blick in die Sonne dank temperaturstabiler Glaskeramik". 2012-05-30. Archived from the original on 2019-03-29. Retrieved 2016-04-14.
2. "GREGOR Telescope". KIS website. Kiepenheuer-Institut für Sonnenphysik. Retrieved 11 January 2014.
3. "GREGOR". IAC website. Instituto de Astrofísica de Canarias. Retrieved 11 January 2014.
4. First light was obtained with a 1-meter test-mirror due to manufacturing issues with the main mirror
5. "GREGOR telescope: Zooming in on the sun". phys.org website. phys.org. May 10, 2012. Retrieved 11 January 2014.
6. "GREGOR Optical Design". KIS website. Kiepenheuer-Institut für Sonnenphysik. Retrieved 11 January 2014.
7. Europe's largest Solar Telescope GREGOR unveils magnetic details of the Sun Sept 2020

Sources

• "GREGOR - A New Telescope for Solar Physics". AIP website. Leibniz Institute for Astrophysics Potsdam. Retrieved 11 January 2014.