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31st of May 2019
The Rapid ASKAP Continuum Survey (RACS)
by Aidan Hotan
ASKAP’s rapid survey speed, enabled by the wide-field Phased Array Feeds, is being used to conduct the Rapid ASKAP Continuum Survey (RACS). The resulting catalogue will be used as the basis for a new sky model for the Southern hemisphere, providing a faster way of calibrating the array in the future. A tiling scheme that uses a 6x6 square arrangement of beams, is moved through strips of constant declination, dwelling on each field for 15 minutes. Observations have been made between 744 and 1032 MHz with 1 MHz frequency resolution. Roughly 900 fields were required to cover the sky South of +40 Dec and to date we have observed down to -70 Dec as shown in the image above. Each circle represents a field centre from the survey plan. Shaded circles have been observed. Coloured circles were observed in the most recent scheduling block. The Sun and Moon are also shown. More details are given in this month's ASKAP Commissioning Update.

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