The 3.6m Indo-Belgian Devasthal Optical Telescope: performance results on site

Ninane, Nathalie; Bastin, Christian; Flebus, Carlo; Kumar, Brijesh

doi:10.1117/12.2232775

Cited by 5 publications

(4 citation statements)

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“…Several publications highlight the design and technical details as well as the results of tests and characterization of the DOT (Flebus et al 2012;Ninane et al 2012aNinane et al , 2012bNinane et al 2016;Kumar et al 2016;Kumar et al 2018a), and the scientific importance of the DOT (Sagar 2000(Sagar , 2017Omar et al 2017). In this paper, we provide a summary of the most resent results obtained from the observations carried out using the DOT.…”

Section: Introductionmentioning

confidence: 88%

Global performance and capabilities of the instruments on the 3.6-m Devasthal Optical Telescope

Omar¹,

Reddy²,

Kumar³

et al. 2019

Preprint

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The recently commissioned 3.6-m Devasthal optical telescope has been used for various tests and science observations using three main instruments, namely, a charge-coupled device camera, a near-infrared camera, and an optical imager-cum-spectrograph. The published results from these instruments assert that the performance of the telescope at the Devasthal site is at par with the expectations. These back-end instruments open up vast opportunities for high-sensitivity observations of the celestial sky with the telescope. This paper provides a summary of the existing back-end instruments and attempts to highlight the importance of the Devasthal optical telescope in synergy with other telescopes operating at different wavelengths.

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Section: Introductionmentioning

confidence: 88%

Global performance and capabilities of the instruments on the 3.6-m Devasthal Optical Telescope

Omar¹,

Reddy²,

Kumar³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…Several publications highlight the design and technical details as well as the results of tests and characterization of the DOT (Flebus et al 2008;Ninane et al 2012aNinane et al , 2012bNinane et al 2016;Kumar et al 2016;Kumar et al 2018a), and the scientific importance of the DOT (Sagar 2000(Sagar , 2017Omar et al 2017). In this paper, we provide a summary of the most resent results obtained from the observations carried out using the DOT.…”

Section: Introductionmentioning

confidence: 90%

Global performance and capabilities of the instruments on the 3.6-m Devasthal Optical Telescope

Omar¹,

Reddy²,

Kumar³

et al. 2019

View full text Add to dashboard Cite

show abstract

“…45 for λ ≤ 1.5 µm) of the telescope is very sharp in comparison to seeing at the site, the wave front error (WFE) of the system is measured using wave front sensor (WFS) by averaging out seeing. Hence, a relationship between measured WFE and the E80 requirement was established by performing a Monte-Carlo analysis considering a large panel of WFE sources 25 . It is found that the specified optical image quality of E80 < 0.…”

Section: Characterization Of Devasthal Sitementioning

confidence: 99%

“…The test-WFS at the Cassegrain axial port is used to measure the image quality of the actively corrected telescope. A comprehensive set of data were collected, analyzed and the test procedures and results were put in form of a professional technical report 25 . The as-built specifications are listed in the Table 3.…”

Section: Installation and Sky Performance Of 36-m Dotmentioning

confidence: 99%

The 3.6 meter Devasthal Optical Telescope: From inception to realisation

Sagar,

Kumar,

Omar

2019

Preprint

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India's largest size 3.6 meter Devasthal optical telescope (DOT) was commissioned in the year 2016, though the idea of building it germinated way back in the year 1976. This article provides research accounts as well as glimpses of its nearly four decades of journey. After a decade of site surveys, location of Devasthal in central Himalyan region of Kumaon 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. After the technical activation of the telescope on March 30, 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 taken with the telescope are also presented. Furthermore, the routine observations find that for a good fraction of observing time the telescope provides sky images of sub-arc-second resolution at optical and near-infrared 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 1997-1999 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.

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The 3.6m Indo-Belgian Devasthal Optical Telescope: performance results on site

Cited by 5 publications

References 1 publication

Global performance and capabilities of the instruments on the 3.6-m Devasthal Optical Telescope

Global performance and capabilities of the instruments on the 3.6-m Devasthal Optical Telescope

Global performance and capabilities of the instruments on the 3.6-m Devasthal Optical Telescope

The 3.6 meter Devasthal Optical Telescope: From inception to realisation

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