Experimental Astronomy

, Volume 43, Issue 1, pp 59–74 | Cite as

Mapping distortion of detectors in UVIT onboard AstroSat observatory

  • V Girish
  • Shyam N. Tandon
  • S. Sriram
  • Amit Kumar
  • Joe Postma
Original Article

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.

Keywords

Distortions UV telescope and instrumentation UV imaging Distortion map 

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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • V Girish
    • 1
  • Shyam N. Tandon
    • 2
    • 3
  • S. Sriram
    • 3
  • Amit Kumar
    • 3
  • Joe Postma
    • 4
  1. 1.Space Astronomy GroupISRO Satellite CentreBangaloreIndia
  2. 2.Inter University Centre for Astronomy and AstrophysicsPuneIndia
  3. 3.Indian Institute of AstrophysicsBangaloreIndia
  4. 4.University of CalgaryCalgaryCanada

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