4th of February 2015 |
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ASKAP Highlights - Tucana field, now 3 epochs & 150 degr2 |
by Ian Heywood (CASS) and ASKAP team |
The above image was made as part of BETA
commissioning to test the rapid, wide area survey capabilities of the
telescope. It covers 150 square degrees to a (1-sigma) depth of below 1 mJy
in only 12 hours of observing time. This observation was repeated on three
different days, and the above three colour image has a one of the three
epochs in each of the red, green and blue image channels. Each epoch contains
approximately 2000 sources above 5-sigma. Fading sources would appear red in
this image, and anything that was brightening would appear blue. The fact
that everything looks white is reassuring from a system stability point of
view, if a little disappointing for the transient enthusiasts, who will
nonetheless hopefully be reassured by the demonstrably superb capabilities
of ASKAP in this domain. Credits for this image: observations by Keith Bannister (CASS), calibration and imaging by Ian Heywood (CASS), and the fact that this is at all possible: the ASKAP and ACES teams. Job opportunity: Postdoctoral Fellowship in Radio Interferometry Calibration and Imaging (apply before Feb 8) |