A sky survey of ultraviolet sources observed through AstroSat's UVIT: A point source catalog

TL;DR

This paper presents a comprehensive ultraviolet point source catalog from AstroSat's UVIT, covering 63 square degrees with over 102,000 sources, providing valuable data for astronomical research.

Contribution

It offers the first extensive UV point source catalog from AstroSat's UVIT, including detailed astrometry and photometry across multiple filters.

Findings

Catalog contains 102,773 sources.

Limiting magnitudes are ~21.3 (FUV) and ~23 (NUV).

Data covers 63 square degrees with high spatial resolution.

Abstract

The Ultra Violet Imaging Telescope (UVIT) onboard India's first dedicated multiwavelength satellite \textit{AstroSat} observed a significant fraction of the sky in the ultraviolet with a spatial resolution of 1.4\arcsec. We present a catalog of the point sources observed by UVIT in the far ultraviolet (FUV; 1300-1800 \AA) and near ultraviolet (NUV; 2000-3000 \AA). We carried out astrometry and photometry of 428 field pointings in the FUV and 54 field pointings in the NUV band, observed in 5 filter bands in each channel respectively, covering an area of about 63 square degrees. The final catalog contains about 102,773 sources. The limiting magnitude(AB) of the F148W band filter, that has the largest number of detections is $\sim21.3$. For the NUV channel, we find the limiting magnitude at around $\sim23$. We describe the final catalog and present the results of the statistical analysis.