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.
- Pub Date:
- February 2017
- UV telescope and instrumentation;
- UV imaging;
- Distortion map;
- Astrophysics - Instrumentation and Methods for Astrophysics
- 16 pages, 12 figures, Accepted for publication in Experimental Astronomy