In-orbit Calibrations of the Ultra-Violet Imaging Telescope

Abstract

The Ultra-Violet Imaging Telescope (UVIT) is one of the payloads in ASTROSAT, the first Indian Space Observatory. The UVIT instrument has two 375mm telescopes: one for the far-ultraviolet (FUV) channel (1300--1800Ã ), and the other for the near-ultraviolet (NUV) channel (2000--3000Ã ) and the visible (VIS) channel (3200--5500Ã ). UVIT is primarily designed for simultaneous imaging in the two ultraviolet channels with spatial resolution better than 1.8 arcsec, along with provision for slit-less spectroscopy in the NUV and FUV channels.The results of in-orbit calibrations of UVIT are presented in this paper.

Accepted to appear in AJ