GREGOR

GREGOR Solar Telescope

GREGOR Solar Telescope

Solar telescope in the Canary Islands

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]

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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

References

  1. [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. [2]
    "GREGOR Telescope". KIS website. Kiepenheuer-Institut für Sonnenphysik. Retrieved 11 January 2014.
  3. [3]
    "GREGOR". IAC website. Instituto de Astrofísica de Canarias. Retrieved 11 January 2014.
  4. [4]
    First light was obtained with a 1-meter test-mirror due to manufacturing issues with the main mirror
  5. [5]
    "GREGOR telescope: Zooming in on the sun". phys.org website. phys.org. May 10, 2012. Retrieved 11 January 2014.
  6. [6]
    "GREGOR Optical Design". KIS website. Kiepenheuer-Institut für Sonnenphysik. Retrieved 11 January 2014.
  7. [7]
    Europe's largest Solar Telescope GREGOR unveils magnetic details of the Sun Sept 2020

Sources


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