Mapping distortion of detectors in UVIT onboard AstroSat observatory |
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| Authors: | V Girish Shyam N Tandon S Sriram Amit Kumar Joe Postma |
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| Institution: | 1.Space Astronomy Group,ISRO Satellite Centre,Bangalore,India;2.Inter University Centre for Astronomy and Astrophysics,Pune,India;3.Indian Institute of Astrophysics,Bangalore,India;4.University of Calgary,Calgary,Canada |
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| Abstract: | Ultraviolet Imaging Telescope (UVIT) is one of the payloads onboard AstroSat, India’s first multi-wavelength Astronomy mission. UVIT is primarily designed to make high resolution images in wide field, in three wavelength channels simultaneously: FUV (130–180 nm), NUV (200–300 nm) and VIS (320–550 nm). The intensified imagers used in UVIT suffer from distortions, and a correction is necessary for these to achieve good astrometry. In this article we describe the methodology and calculations used to estimate the distortions in ground calibrations. |
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