# A southern-sky total intensity source catalogue at 2.3 GHz from S-band Polarisation All-Sky Survey data

## TL;DR

This paper presents a comprehensive total intensity source catalogue at 2.3 GHz from the S-PASS survey, covering the southern sky with detailed source positions and flux densities, useful for extragalactic studies.

## Contribution

The paper introduces a new, large-scale extragalactic source catalogue at 2.3 GHz derived from re-processed S-PASS data, with improved source detection and positional accuracy.

## Key findings

- Contains 23,389 sources over 16,600 deg²
- Achieves over 95% completeness at 225 mJy
- 94% of sources brighter than 500 mJy have lower frequency counterparts

## Abstract

The S-band Polarisation All-Sky Survey (S-PASS) has observed the entire southern sky using the 64-metre Parkes radio telescope at 2.3GHz with an effective bandwidth of 184MHz. The surveyed sky area covers all declinations $\delta\leq 0^\circ$. To analyse compact sources the survey data have been re-processed to produce a set of 107 Stokes $I$ maps with 10.75arcmin resolution and the large scale emission contribution filtered out. In this paper we use these Stokes $I$ images to create a total intensity southern-sky extragalactic source catalogue at 2.3GHz. The source catalogue contains 23,389 sources and covers a sky area of 16,600deg$^2$, excluding the Galactic plane for latitudes $|b|<10^\circ$. Approximately 8% of catalogued sources are resolved. S-PASS source positions are typically accurate to within 35arcsec. At a flux density of 225mJy the S-PASS source catalogue is more than 95% complete, and $\sim$94% of S-PASS sources brighter than 500mJy beam$^{-1}$ have a counterpart at lower frequencies.