RACS-low DR1

RACS-low DR1 products

The first data release (DR1) of RACS-low consists of a curated and combined subset of 799 tiles observed in the lowest band (888 MHz) and is recommended for general science use. The tile images in this release have been convolved to a common resolution of 25 arcsec and combined with neighbouring tile images to improve the uniformity of sensitivity. The subset of fields covers the entire sky region between declination -80 deg and +30 deg (declinations outside of this region could not be convolved to a resolution of 25 arcsec and so were excluded in this release but are still available as part of the RACS-low DR1 raw data products, see RACS-low DR1 raw data, though the use of that data requires expert domain knowledge).

The following data products are available for RACS-low DR1:

  • Tile images (convolved to a common resolution of 25 arcsec) mosaicked with neighbouring tiles . These can be obtained via the CASDA Observation Search page (https://data.csiro.au/domain/casdaObservation) by selecting the project “AS110 – The Rapid ASKAP Continuum Survey” and setting the filename filter to “DR1*A.fits” for the tile images (other search criteria can also be provided to narrow the search). The following shows the search criteria to return all tile images:

  • An associated rms image for each tile. These can be obtained via the CASDA Observation Search page (see above) by selecting the project “AS110 – The Rapid ASKAP Continuum Survey” and setting the filename filter to “DR1*RMS.fits”. Other search criteria can also be provided to find a specific tile.
  • An all-sky source and component catalogue (catalogues have been divided into regions excluding the Galactic Plane and those within the Galactic Plane). The full catalogues are available through CASDA via https://data.csiro.au/collection/csiro:52217v4
  • An all-sky HiPS image. The following URL provides access to the HiPS image and can be accessed via Aladin (using the menu item “Load direct URL…”): https://www.atnf.csiro.au/research/RACS/CRACSlow1_I2

The CASDA webpage provides additional examples of how to access the catalogues and images from this release via a web interface and also via Python scripts see: https://research.csiro.au/casda/the-rapid-askap-continuum-survey-stokes-i-source-catalogue-data-release-1/