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Kumar, Brijesh
- Scientific Capabilities and Advantages of the 3.6 Meter Optical Telescope at Devasthal, Uttarakhand
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PDF Views:87
Authors
Affiliations
1 Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263 002, IN
1 Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263 002, IN
Source
Current Science, Vol 113, No 04 (2017), Pagination: 682-685Abstract
India's largest 3.6 m aperture optical telescope has been successfully installed in the central Himalayan region at Devasthal, Nainital district, Uttarakhand. The primary mirror of the telescope uses the active optics technology. The back-end instruments, enabling spectroscopic and photometric imaging of the celestial sky are designed and developed by ARIES along with other Indian institutes. The Devasthal optical telescope in synergy with two other highly sensitive telescopes in the country, namely GMRT operating in the radio wavebands and AstroSat operating in the high-energy X-ray, ultraviolet and visual wavebands, will enable Indian astronomers to carry out scientific studies in several challenging areas of astronomy and astrophysics.Keywords
Active Optics Technology, Celestial Sky, Instrumentation, Optical Astronomy.Full Text
References
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- Chung, H. et al., DOTIFS: a new multi-IFU optical spectrograph for the 3.6-m Devasthal optical telescope, Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91470V, 18 July 2014; doi:10.1117/12.2053051.
- Pteridological Researches in India
Abstract Views :267 |
PDF Views:88
Authors
Affiliations
1 Botanical Survey of India, NRC Dehradun - 248 195, IN
2 Botanical Survey of India, APRC Itanagar 791 111, IN
1 Botanical Survey of India, NRC Dehradun - 248 195, IN
2 Botanical Survey of India, APRC Itanagar 791 111, IN
Source
Current Science, Vol 115, No 2 (2018), Pagination: 200-201Abstract
The symposium on ‘Pteriodological research in India’ was inaugurated by Brig. (retired) B. D. Mishra, the Governor of Arunachal Pradesh. Mishra highlighted the urgent need to explore innovative ways of conservation of nature’s bounty for the welfare of the present and future generations, and called upon researchers to come up with effective and sustainable models of development to mitigate continuous pressure on plants and natural habitats.Full Text
- The 3.6 Metre Devasthal Optical Telescope:From Inception to Realization
Abstract Views :235 |
PDF Views:82
Authors
Affiliations
1 Indian Institute of Astrophysics, Sarajapur Road, Koramangala, Bengaluru 560 034, IN
2 Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263 001, IN
1 Indian Institute of Astrophysics, Sarajapur Road, Koramangala, Bengaluru 560 034, IN
2 Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263 001, IN
Source
Current Science, Vol 117, No 3 (2019), Pagination: 365-381Abstract
India’s largest 3.6 metre Devasthal Optical Telescope (DOT) was commissioned in 2016, though the idea of building it germinated way back in 1976. This article provides research accounts as well as glimpses of its nearly four decades of journey. After a decade of site surveys, Devasthal in the central Himalayan region of Kumaon, Uttarkhand was identified. Thereafter, a detailed site characterization was conducted and project approvals were obtained. The telescope is designed to be a technologically advanced optical astronomy instrument. It has been demonstrated to resolve a binary star having angular separation of 0.4 arc-sec. After technical activation of the telescope on 30 March 2016, it has been in regular use for testing various back-end instruments as well as for optical and near-infrared observations of celestial objects. Back-end instruments used for these observations are 4K × 4K CCD IMAGER, faint object imager-cum-spectrograph and TIFR nearinfrared camera-II. A few published science results based on the observations made with the telescope are also presented. Furthermore, routine observations show that for a good fraction of observing time the telescope provides sky images of sub-arc second resolution at optical and nearinfrared wavelengths. This indicates that the extreme care taken in the design and construction of the telescope dome building has been rewarding, since the as-built thermal mass contributes minimally so as not to degrade the natural atmospheric seeing measured at Devasthal about two decades ago during 1997–99 using differential image motion monitor. The overall on-site performance of the telescope is found to be excellent and at par with the performance of other similar telescopes located over the globe.Keywords
History, Optical Telescope, Optical Observatory, Site Characterization, Sky Performance.Full Text
References
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