since 05 February 2011 :
View(s): 933 (8 ULiège)
Download(s): 0 (0 ULiège)
print        
Purvi Udhwani, Amitesh Omar & Krishna Reddy

Assembly and Testing of Ground Layer Adaptive Optics (GLAO) for ARIES Telescopes

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
Article
Open Access

Attached document(s)

original pdf file

Abstract

This project is focused on evaluating the slowly-varying ground layer seeing component at the optical telescopes of ARIES. To achieve this, we assembled the instrument, consisting of a filter wheel, a CCD camera, and a tip-tilt enabled transparent glass plate integrated within an off-the-shelf unit termed as the AO (Adaptive Optics) unit. The instrument developed by us was deployed on the 1.04-m f/13 Sampurnanand telescope at Manora Peak and the 1.3-m f/4 telescope at Devasthal. This instrument measures the average instantaneous slope (tip/tilt) of the incoming wavefront over the telescope aperture via a fast (within the atmospheric coherence time) sampled image and corrects it via a software-controlled oscillating (tipping/tilting) single thin glass plate. The night observations revealed that the slowly-varying seeing component is significant at both observatories and can be effectively controlled to enhance the sharpness of the celestial images at the two sites. The most significant improvement was measured from 5 arcsec of uncorrected FWHM of a star to 3.4 arcsec of corrected FWHM in the 1.04-m telescope in the evening hours.

Keywords : Turbulence, tip-tilt correction, GLAO

To cite this article

Purvi Udhwani, Amitesh Omar & Krishna Reddy, «Assembly and Testing of Ground Layer Adaptive Optics (GLAO) for ARIES Telescopes», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 89-95 URL : https://popups.ulg.ac.be/0037-9565/index.php?id=11608.

About: Purvi Udhwani

Aryabhatta Research Institute of Observational Sciences, Nainital, UK 263002, India. Corresponding author: udhwanip1@gmail.com

About: Amitesh Omar

Aryabhatta Research Institute of Observational Sciences, Nainital, UK 263002, India and Indian Institute of Technology, Kanpur, 208016, India

About: Krishna Reddy

Aryabhatta Research Institute of Observational Sciences, Nainital, UK 263002, India