Rapid ASKAP Continuum Survey (RACS) DR1

The Rapid ASKAP Continuum Survey (RACS) is the first large sky survey using the Australian Square Kilometre Array Pathfinder (ASKAP), owned and operated by Australia's national science agency, CSIRO. It and will ultimately survey a contiguous region in the declination range -90 deg to +47 deg in three frequency bands (RACS-low: 887.5 MHz, RACS-mid: 1367.5 MHz and RACS-high: 1655.5 MHz). RACS Data Release 1 includes initial observations made for RACS-low (central frequency of 887.5 MHz) and is comprised of 903 tiles in the declination range -90 deg to +41 deg (the original observations and images are available through the CSIRO ASKAP Science Data Archive). A subset of 799 tiles in the declination range -80 deg to +30 deg were convolved to a common resolution of 25” to allow mosaicking of neighbouring tiles and to generate a catalogue with consistent resolution. The convolved and mosaicked tiles have a median one-sigma sensitivity of ~300 µJy/beam and are made available through this service.


Papers based on RACS observations should cite the relevant papers (1) for the RACS survey description; (2) for the convolved and combined RACS-low images from Data Release 1 and associated catalogue:

(1) McConnell, D., Hale, C., Lenc, E., Banfield, J., et al. (2020). The Rapid ASKAP Continuum Survey I: Design and first results. Publications of the Astronomical Society of Australia, 37, E048, doi:10.1017/pasa.2020.41


(2) Hale, C.L., McConnell, D., Thomson, A.J., Lenc, E. et al. (2021), "The Rapid ASKAP Continuum Survey II: First Stokes I Source Catalogue Data Release", PASA, doi:10.1017/pasa.2021.47


Publications that use data from ASKAP should include the text:

The ASKAP radio telescope is part of the Australia Telescope National Facility which is managed by Australia's national science agency, CSIRO. Operation of ASKAP is funded by the Australian Government with support from the National Collaborative Research Infrastructure Strategy. ASKAP uses the resources of the Pawsey Supercomputing Research Centre. Establishment of ASKAP, the Murchison Radio-astronomy Observatory and the Pawsey Supercomputing Research Centre are initiatives of the Australian Government, with support from the Government of Western Australia and the Science and Industry Endowment Fund. We acknowledge the Wajarri Yamatji people as the traditional owners of the Observatory site. This paper includes archived data obtained through the CSIRO ASKAP Science Data Archive, CASDA (https://data.csiro.au).

Data from CASDA is given under a Creative Commons Attribution 4.0 International Licence.

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