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Standardization in the UV with Astrosat and its issues related to star cluster studies

Published online by Cambridge University Press:  03 March 2020

Priya Shah
Priya Shah*
Affiliation:
Department of Physics, Maulana Azad National Urdu University, Gachibowli, Hyderabad500 032, India email: priya.hasan@gmail.com
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Abstract

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The Ultra-Violet Imaging Telescope (UVIT) is one of the payloads in Astrosat, the first Indian Space Observatory. The UVIT instrument has two 375 mm telescopes: one for the far-ultraviolet (FUV) channel (1300-1800 Å), and the other for the near-ultraviolet (NUV) channel (2000-3000 Å) and the visible (VIS) channel (3200-5500 Å). We shall discuss the issues with standardization in the UV with reference to Astrosat Observations (Cycle A04). I shall discuss the problems faced in data-analysis and how these in turn lead to serious issues dealing with the color-magnitude diagarms, membership and age of the young embedded clusters studied.

Keywords

Galaxy:) haloopen clusters and associations: individual (C438, C439)ultraviolet: stars

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