Installation of solar chromospheric telescope at the Indian Astronomical Observatory, Merak
Autor: | Tsewang Dorjai, Ravinder K. Banyal, P. U. Kamath, M. Rajalingam, K. Sagayanathan, Angchuk Dorjee, Prabhu Kesavan, K. C. Thulasidharen, P. M. M. Kemkar, Namgyal Dorjey, B. Ravindra |
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Rok vydání: | 2018 |
Předmět: |
Physics
Sunspot 010504 meteorology & atmospheric sciences Balmer series Astronomy and Astrophysics Astrophysics 01 natural sciences Solar telescope law.invention Telescope symbols.namesake Space and Planetary Science law Observatory 0103 physical sciences symbols 010303 astronomy & astrophysics Hydrogen spectral series Chromosphere 0105 earth and related environmental sciences Line (formation) |
Zdroj: | Journal of Astrophysics and Astronomy. 39 |
ISSN: | 0973-7758 0250-6335 |
Popis: | We report the observations of the solar chromosphere from a newly commissioned solar telescope at the incursion site near Pangong Tso lake in Merak (Leh/Ladakh). This new $$\hbox {H}_{\alpha }$$ telescope at the Merak site is identical to the Kodaikanal $$\hbox {H}_{\alpha }$$ telescope. The telescope was installed in the month of August 2017 at the Merak site. The telescope consists of a 20-cm doublet lens with additional re-imaging optics. A Lyot filter with 0.5 A passband isolates the Balmer line of the hydrogen spectra to make the observations of the solar chromosphere. The observations made in $$\hbox {H}_{\alpha }$$ wavelength delineates the magnetic field directions at the sunspot and the quiet regions. A CCD detector records the images of the chromosphere with a pixel resolution of 0.27 $$^{\prime \prime }$$ and covers 9.2 $$^{\prime }$$ field-of-view. This telescope has a good guiding system that keeps the FoV in the intended position. We report the development of control software for tuning the filter unit, control detector system, observations and calibration of the data to make it useful for the scientific community. Some preliminary results obtained from the Merak $$\hbox {H}_{\alpha }$$ telescope are also presented. This high altitude facility is a timely addition to regularly obtain $$\hbox {H}_{\alpha }$$ images around the globe. |
Databáze: | OpenAIRE |
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