ATNF Daily Astronomy Picture

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22nd of March 2015
Observing at the Australia Telescope Compact Array
by Bärbel Koribalski (CASS)
Five antennas of CSIRO's Australia Telescope Compact Array (ATCA) can be moved to different stations along the east-west track (seen in this picture) and, occasionally, the short northern spur. CA06 stays fixed and provides the longest (up to 6 km) ATCA baselines. Together, all six 22-m antennas form a powerful radio interferometer with receivers from 1 to 105 GHz. It is the combination of all baselines - N antennas give N*(N-1)/2 baselines - that matters in imaging, eg extended hydrogen emission from galaxies or compact radio continuum sources.

The resident kangaroos are just one of the many reasons to visit the site. The ATCA is located just outside the town of Narrabri in New South Wales (NSW), Australia.

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