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28th of October 2016
GLEAM survey I: a low-frequency extragalactic catalog
by Natasha Hurley-Walker (ICRAR/Curtin University)
Published today in Monthly Notices of the Royal Astronomical Society, the first catalogue from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey comprises flux density and morphology measurements for over 300,000 radio galaxies across the low, wide frequency range of 72 -- 231 MHz, with a flux scale accurate to better than 8%.

The image shows a "radio colour" view of GLEAM above a "tile" of the MWA radio telescope, located in the Murchsion Radio Observatory, also home to ASKAP. Red indicates 72--103 MHz, green 103--134 MHz and blue 139--170MHz. The synchrotron emission of the Milky Way is visible as a band across the sky, Centaurus A is just setting, and the Large Magellanic Cloud is on the left. A video of this view, cross-faded with an optical time lapse, can be found here.

Credit: Radio image by Natasha Hurley-Walker (International Centre for Radio Astronomy Research / Curtin University) and the GLEAM Team. MWA tile and landscape by Dr John Goldsmith / Celestial Visions.

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