3.6 m Devasthal Optical Telescope
|Location(s)||Nainital district, Uttarakhand, India|
|Organization||Aryabhatta Research Institute of Observational Sciences|
|Altitude||2,540 m (8,330 ft)|
|Wavelength||350 nm (860 THz)-5,000 nm (60 THz)|
|Telescope style||Optical telescope|
|Diameter||3.6 m (11 ft 10 in)|
|Focal length||32.4 m (106 ft 4 in)|
The 3.6m Devesthal Optical Telescope is a clear aperture Ritchey-Chretien style telescope built by Aryabhatta Research Institute of Observational Sciences(ARIES) and is located at the Devasthal Observatory site near Nainital, India. ARIES operates another 1.3m telescope at the same location. The telescope was activated remotely on March 31, 2016 by Indian Prime Minister Narendra Modi and Belgian Prime Minister Charles Michel from Brussels. The telescope optics has been built in collaboration with the Belgian firm Advanced Mechanical & Optical System (AMOS).
The 3.6m DOT is currently the largest reflecting telescope in Asia. The telescope intends to fill a large longitudinal gap in the 4m class of telescopes in the Asia region. The telescope features an optical spectrograph, a CCD imager and a near-infrared spectrograph. The telescope is also the first of kind in India that features an active optics system, featuring a wavefront sensor and pneumatic actuators which compensates for small distortions in the shape of the 4.3 tonne mirror due to gravity or atmospheric aberrations.
- Aryabhatta Research Institute of Observational Sciences
- List of largest optical reflecting telescopes
- "'Remote Technical Activation' of the 3.6m Devasthal Optical Telescope at Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital". Press Information Bureau, Government of India.
- Sagar, Ram (2012). "New optical telescope projects at Devasthal Observatory". Ground-based and Airborne Telescopes IV. Proceedings of the SPIE. 8444. pp. 84441T. arXiv:1304.2474. Bibcode:2012SPIE.8444E..1TS. doi:10.1117/12.925634.
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