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TSEWANG DORJAI
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Volume 39 Issue 5 October 2018 Article ID 0060
Installation of solar chromospheric telescope at the Indian Astronomical Observatory, Merak
B. RAVINDRA PRABHU KESAVAN K. C. THULASIDHAREN M. RAJALINGAM K. SAGAYANATHAN P. U. KAMATH NAMGYAL DORJEY ANGCHUK DORJEE P. M. M. KEMKAR TSEWANG DORJAI RAVINDER K. BANYAL
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 Hα telescope at the Merak site is identical to the Kodaikanal 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 å passband isolates the Balmer line of the hydrogen spectra to make the observations of the solarchromosphere. The observations made in Hα 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$''$and covers 9.2$'$ 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 H$_{\alpha}$ telescope are also presented. This high altitude facility is a timely addition to regularly obtain H$_{\alpha}$ images around the globe.
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Volume 43 All articles Published: 31 May 2022 Article ID 0032 OBSERVATIONAL FACILITIES
A 10-m class national large optical-IR telescope
G. C. ANUPAMA G. MAHESWAR S. SRIRAM T. SIVARANI P. S. PARIHAR S. NAGABHUSHAN DORJE ANGCHUK S. BARWAY B. C. BHATT R. BANYAL ALIKHAN BASHEER PRASANNA DESHMUKH DEVIKA DIVAKAR TSEWANG DORJAI ARUNA GOSWAMI K. V. GOVINDA SONAM JORPHAIL U. S. KAMATH MADAN MOHAN KEMKAR TASHI TSERING MAHAY S. MUNEER C. MUTHUMARIAPPAN SHANTIKUMAR SINGH NINGOMBAM G. PANDEY B. E. REDDY D. K. SAHU D. S. SANDEEP RAMYA SETHURAM C. S. STALIN S. SUBRAMANIAN STANZIN TSEWANG A. SUBRAMANIAM
An observatory class national large optical-IR telescope (NLOT), is proposed to be built and located in the country. The telescope consists of a 10–12 m segmented primary. In order to cater to a diversity of observational programs, the telescope is designed with high throughput in both the optical and IRregions (0.3–5 $\mu$m). It should perform reasonably well up to 30 $\mu$m. The telescope and instruments should have remote operations capability, allowing for the queue as well as classical scheduling and high reliability and robustness. This article provides a brief description of the science cases that drive the telescope requirements, activities related to optics design and some thoughts on the instruments.
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Journal of Astrophysics and Astronomy
Volume 44, 2023
All articles
Continuous Article Publishing mode
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Journal of Astrophysics and Astronomy | News
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Continuous Article Publication
Posted on January 27, 2016Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.
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Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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