First data release of ASKAP SWAG-X with multiwavelength coverage of the GAMA-09 equatorial sky region

The first data release for the Survey With ASKAP of GAMA-09 + X-ray (SWAG-X) is now available on the CSIRO ASKAP Science Data Archive (CASDA).

This data release comprises the first half of the full survey data, taken at 888 MHz and 1296 MHz with the ASKAP radio telescope, owned and operated by Australia’s national science agency, CSIRO.

SWAG-X was initiated as a complementary ASKAP survey to the eROSITA X-ray and the GAMA-09 spectroscopic observations at the Anglo-Australian Telescope (AAT) to contribute to studies of cosmology, galaxy formation and evolution.

Enabled by the collaboration agreement which was signed between eROSITA_DE and AAL on behalf of Australian astronomers, the SWAG-X survey has been devised to provide radio data covering the eROSITA performance verification field for the eROSITA Final Equatorial-Depth Survey (eFEDS). SWAG-X was designed in consultation with existing ASKAP Survey Science Teams to provide a useful resource of science data, in combination with the extensive multiwavelength database compiled by the GAMA team.

The full SWAG-X sensitivity will be achieved after 16 hr integration at 888 MHz and 1296 MHz at full spectral resolution, covering the same region as eFEDS (which is an extended area around the GAMA-09 field marked in the image). In this first release, there are 12 ASKAP fields available that include 6 tiles of 8 hr integration in each band. In each case, continuum and spectral data are available on CASDA.

Released data can be accessed via CASDA searching under the project code “AS112”. Additional data products including continuum mosaics of the SWAG-X regions and full field catalogues are being completed and will also be available via CASDA. The second-final release of the SWAG-X survey data is expected later this year.

Mosaic of ASKAP images of the SWAG-X field at 888 MHz, with the field coverage of eFEDS and GAMA-09 also marked. The small circles mark each individual ASKAP beam (colour-coded by beam number) and total field-of-view. Image credit: V. Moss/E.Lenc/CSIRO

For any questions about SWAG-X, please contact Vanessa Moss (lead, CSIRO Head of ASKAP Science Operations), Matt Whiting (CSIRO Head of ASKAP Data Operations), or Aidan Hotan (CSIRO ASKAP Project Scientist). A description paper of SWAG-X is in progress (Moss et al. in prep).

For more information about the eROSITA/AAL collaborative agreement please see AAL’s eROSITA page, or contact Duncan Galloway (Monash University) and Shona Madoc (AAL) for more information. For questions about the eROSITA consortium please contact Andrea Merloni (MPE) and Mara Salvato (MPE).

CSIRO acknowledges the Wajarri Yamatji as the traditional owners of the Murchison Radio-astronomy Observatory site where ASKAP is located. Continued development of CASDA is supported in part by a National Collaborative Research Infrastructure Strategy (NCRIS) grant administered by AAL. We acknowledge the efforts of the following people in making this first SWAG-X data release possible:

SWAG-X team: V. Moss, M. Whiting, A. Hotan, C. Hale, E. Lenc, E. Kerrison

ASKAP Survey Science Team contributors: B. For, K. Lee-Waddell, E. Mahony, T. Murphy, J. Rhee, H. Yoon

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