A Progress Report on the Long Wavelength Array (LWA)

Details A Progress Report on the Long Wavelength Array (LWA) A Progress Report on the Long Wavelength Array (LWA)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21544206t&link_type=abstract

American Astronomical Society, AAS Meeting #215, #442.06; Bulletin of the American Astronomical Society, Vol. 42, p.407

Astronomy and Astrophysics

Astronomy

Scientific paper

The Long Wavelength Array (LWA), a SKA Pathfinder, will consist of 53 phased-array "stations,” each consisting of 256 pairs of crossed-dipole antennas, operating with Galactic noise-limited sensitivity over the frequency range 20-80 MHz. The stations will be distributed over the state of New Mexico, which has a relatively benign RFI environment, with maximum baselines (distances between stations) of up to 400 km, and nominally 16 stations in a `core’ within the central 10 km. The LWA will form four independent (in both frequency and pointing) beams on the sky, with instantaneous bandwidths of 8 MHz per beam, spectral resolutions down to 100 Hz, and temporal resolutions to 0.1 ms. It will image wide fields of view with sufficient diversity of baselines to study both compact and complex sources in interferometric mode. The planned sensitivity in each beam will be a few mJy in 8 hours with a resolution of 8" to 2" (20 to 80 MHz).
The first LWA station is under construction, and should be operating with a partial digital system by February 2010, and in full operation by November 2010. In addition to verifying the technical design elements, LWA-1 will provide critical engineering studies that must be done before proceeding to the next stations. It will also host a number of scientific programs addressing pulsars, general transient searches, radio recombination lines, solar and Jupiter bursts, and ionospheric phenomena.
Construction of the LWA has been supported by the Office of Naval Research under Contract N00014-07-C-0147. For more about the LWA see http://lwa.unm.edu

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