Development of image motion compensation system for 1.3 m telescope at Vainu Bappu Observatory

作     者：Sreekanth Reddy Vallapureddy Ravinder Kumar Banyal Sridharan Rengaswamy P Umesh Kamath Aishwarya Selvaraj Sreekanth Reddy Vallapureddy;Ravinder Kumar Banyal;Sridharan Rengaswamy;P Umesh Kamath;Aishwarya Selvaraj

作者机构：Indian Institute of Astrophysics 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2020年第20卷第1期

页      面：93-106页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：We would like to thank Prof.B Raghavendra Prasad for allowing us to use the lab facilities at CREST.We also gratefully acknowledge the help received from Mr.Suresh Venkata Narra during the initial testing and from Mr.Hari Mohan Varsey for preparing the mechanical design of the instrument.We thank Mr 

主　　题：adaptive optics atmospheric effects high angular resolution 

摘      要：We developed a tip-tilt system to compensate the turbulence induced image motion for the 1.3 m telescope at Vainu Bappu Observatory,at *** instrument is designed to operate at the visible wavelength band(480-700 nm)with a field of view of 1′×1′.The tilt corrected images have demonstrated up to ≈57% improvement in image resolution and a corresponding peak intensity increase by a factor of ≈2.8.A closed-loop correction bandwidth of ≈26 Hz has been achieved with on-sky tests and the root mean square motion of the star image has been reduced by a factor of ~*** results are consistent with theoretical and numerical predictions of wave-front aberrations caused by atmospheric turbulence and image quality improvement expected from a real-time control *** this paper,we present details of the instrument design,laboratory calibration studies and quantify its performance on the telescope.