Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21720309m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #203.09; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
The Expanded Very Large Array (EVLA, Perley et al. 2009, arXiv:0909.1585) is a program to significantly enhance the capabilities of the VLA through replacement of the receivers, electronics, signal paths, and correlator with cutting-edge technology. When completed in 2012, this upgrade will provide significantly increased continuum sensitivity and spectral survey speeds (by factors of 100 or more in select cases) from 1-50 GHz and in key bands below 1 GHz. Early science observations with EVLA started in March 2010, with increasing capabilities being made available to users over time.
The ATA and the EVLA respectively provide complementary capabilities for low-frequency surveys, and high-frequency coverage plus deep targeted follow-up observations. As a first stage of cooperation, ATA and EVLA will be used to develop key techniques needed to enable future joint RSSP observations, particularly in the area of linked time-domain surveys. In addition, the two instruments will be used in the near term to investigate technical issues related to the development of next-generation radio arrays such as the Square Kilometre Array (SKA).
As increased capabilities become available, a suite of more ambitious Joint RSSP (J-RSSP) observing programs can be undertaken. These projects address science goals central to illuminating the questions posed by Astro2010. A primary J-RSSP target area will be to explore the Dynamic Radio Sky through ATA surveys and prompt EVLA follow-up. The ATA and EVLA are also primary components in a world-wide pulsar timing array as part of the NANOGrav initiative to detect nano-Hertz gravitational waves. Furthermore, J-RSSP studies of the evolution of gas and galaxies and particles and fields through cosmic time will bridge the eras from cosmic dawn to the dawn of new worlds. These and other innovative studies will leverage the considerable capabilities of these two instruments for opening new astronomical horizons this decade and beyond.
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