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
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)–2.0 μm (150 THz)
First light	12 March 2009
Telescope style	Gregorian telescope optical 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)
Mounting	altazimuth mount
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

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2020 upgrade

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

See also

References

Sources

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

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[de] GREGOR

[ru] Телескоп Грегори