The new VLA low-band system

H. T. Intema1*, F. N. Owen1, N. E. Kassim2, T. E. Clarke2, S. Coffey1, W. D. Cotton3, S. J. Durand1, E. W. Greisen1, P. Harden1, B. Hicks2, C. Kutz1, M. Y. Mao1, D. Mertely1, S. G. Neff4, A. M. M. Scaife5, R. A. Perley1, E. Polisensky2, M. Pospieszalski6 K. Sowinski1, R. Subrahmanyan1,7, K. W. Weiler2 and T. L. Wilson2
1National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USA
2Naval Research Laboratory, Remote Sensing Division, 4555 Overlook Ave SW, Washington, DC 20375 USA
3National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA
4NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA
5Department of Physics & Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, UK
6National Radio Astronomy Observatory, 180 Boxwood Estate Road, Charlottesville, VA 22903, USA
7Raman Research Institute, CV Raman Avenue, Sadashivanagar, Bangalore 560080, India

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We present an overview of the new (50–500 MHz) Low-Band system on the Very Large Array. Initially using the legacy 4- and P-band feeds, this joint development e ort of the Naval Research Laboratory and the National Radio Astronomy Observatory provides an order of magnitude improvement in available bandwidth (approx. 55–85 MHz and 230– 470 MHz, at 4- and P-band respectively) over the legacy narrow-band receivers. The new P-band system has been made available to the community for observing since the fall of 2013. The new 4-band system is being commissioned.

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Keywords : instrumentation: detectors, interferometers