Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-23
Astron.J.133:1505-1518,2007
Astronomy and Astrophysics
Astrophysics
Accepted by AJ. 17 pages with figures
Scientific paper
10.1086/511068
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array--Low Frequency Demonstrator (MWA-LFD) to better understand the widefield, wideband properties of their design and to characterize the radio frequency interference (RFI) between 80 and 300 MHz at the site in Western Australia. Observations acquired during the six month deployment confirmed the predicted sensitivity of the antennas, sky-noise dominated system temperatures, and phase-coherent interferometric measurements. The radio spectrum is remarkably free of strong terrestrial signals, with the exception of two narrow frequency bands allocated to satellite downlinks and rare bursts due to ground-based transmissions being scattered from aircraft and meteor trails. Results indicate the potential of the MWA-LFD to make significant achievements in its three key science objectives: epoch of reionziation science, heliospheric science, and radio transient detection.
Barnes David G.
Bowman David J.
Briggs Frank H.
Cappallo Roger J.
Corey Brian E.
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