Astrometrically corrected catalogues of the Rapid ASKAP Continuum Survey - Low epochs

These source lists provide corrected astrometry for the RACS-Low3 epoch of the Rapid ASKAP Continuum Survey, based on the methodology described in the paper "Enhanced Astrometry of the Rapid ASKAP Continuum Survey for Precise Localisation of Fast Radio Bursts (Jaini et al. 2025)". The corrections are applied to the raw, unmosaicked source lists available via the https://research.csiro.au/racs/racs-low3-dr1-raw-data/. The structure and metadata follow the original per-beam source lists, with the addition of columns containing the corrected astrometric information.

'col_ra_deg_fin', 'col_dec_deg_fin': Corrected Right Ascension and Declination values
'col_ra_deg_cont', 'col_dec_deg_cont': Original, uncorrected RA and Dec. values
'col_ra_err_fin', 'col_dec_err_fin': Corrected errors in RA and Dec.
'col_ra_err', 'col_dec_err': Original positional uncertainties

Note: These unmosaicked per-beam source lists are intended for expert users familiar with RACS data processing. For details on source list format, header definitions, and usage, refer to the RACS Bitbucket repository (https://bitbucket.csiro.au/projects/ASKAP_SURVEYS/repos/racs/browse), specifically under epoch_9 for RACS-Low3.

These catalogues can be accessed by querying the Data Central TAP service at https://datacentral.org.au/vo/tap. Documentation for this service can be found at https://docs.datacentral.org.au/reference/services/tap-service/.