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

TL;DR

This paper discusses the challenges of standardization in ultraviolet observations with Astrosat's UVIT instrument, highlighting data analysis issues affecting star cluster studies and their derived properties.

Contribution

It identifies specific standardization issues in UVIT data and their impact on star cluster analysis, offering insights into data processing challenges.

Findings

Standardization issues affect UVIT data quality.

Data analysis problems impact star cluster property estimation.

Challenges influence color-magnitude diagram accuracy.

Abstract

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 A), and the other for the near-ultraviolet (NUV) channel (2000-3000 A) and the visible (VIS) channel (3200-5500 A). 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.