Ultra-Violet Imaging Telescope (UVIT)
Ultra-Violet Imaging Telescope (UVIT) is mounted on India’s first multi-wavelength astronomical observatory AstroSat. It has completed five years of astronomical photography in visible, near-ultraviolet, and far-ultraviolet spectrum.
AstroSat primarily consists of two telescopes. They are:
• The Ultra Violet Imaging Telescope (UVIT) performs imaging simultaneously in three channels: 130–180 nm, 180–300 nm, and 320–530 nm.
• In each of the three channels a spectral band can be selected through a set of filters mounted on a wheel; in addition, for the two ultraviolet channels a grating can be selected in the wheel to do slitless spectroscopy with a resolution of ~100. The primary mirror diameter of thetelescope is 40 cm.
• The Soft X-ray Imaging Telescope (SXT) employs focusing optics and a deep depletion CCD camera at the focal plane to perform X-ray imaging in the 0.3–8.0 keV band.
Weighing 230 kg, the UVIT consists of two separate telescopes.
o One of them works in the visible (320-550 nm) and the (near-ultraviolet) NUV (200-300 nm).
o The second works only in the (far-ultraviolet) FUV (130-180 nm).
It is one of the five payloads onboard India’s first multi-wavelength astronomical observatory AstroSat and completed five years of operation in the sky by imaging astronomical objects on 28 September 2020.
It has explored stars, star clusters, mapping of the large and small satellite galaxies nearby to our own Milky Way galaxy called the Magellanic Clouds, an energetic phenomenon in the Universe such as the ultra-violet counterparts to gamma-ray bursts, supernovae, active galactic nuclei, and so on.
AstroSat was launched by the Indian Space Research Organization (ISRO) and has proved to be an important satellite capable of carrying out simultaneous observations over a range of wavelengths from the far ultraviolet to the hard X-ray band.
The UVIT project was led by the Indian Institute of Astrophysics (IIA), an autonomous institute of the Department of Science & Technology, Government of India, in collaboration with the Inter University Centre for Astronomy and Astrophysics, Pune, the Tata Institute of Fundamental Research, Mumbai, several centers of ISRO and the Canadian Space Agency.