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Background-Limited Performance in the Submillimeter

Published online by Cambridge University Press:  12 April 2016

J. A. Davidson
Affiliation:
NASA/Ames Research Center, MS 245-6 Moffett Field, CA 94035-1000, USA
T. L. Roellig
Affiliation:
NASA/Ames Research Center, MS 245-6 Moffett Field, CA 94035-1000, USA
R. J. Pernic
Affiliation:
Yerkes Observatory Williams Bay, WI53191, USA

Extract

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We have been awarded NASA funds to construct a Submillimeter (SMM) Array Photometer for use at the Caltech SMM Observatory (CSO) on Mauna Kea. The array will consist of 5×5 composite bolometers illuminated through light cones. On the CSO, each cone will cover 25 arcsecs on the sky, implying a total field-of-view for the array of just over 2×2 arcmins. Our aim is to achieve background-limited performance in the 730 and 870 μm atmospheric windows, thus obtaining a Noise Equivalent Flux Density (NEFD) of approximately 0.1 Jy/√Hz at these wavelengths. This sensitivity level will enable 5-sigma measurements of 10 mJy sources (such as radio-quiet quasars) in about one hour. We also will have the capability to operate at 1.1 mm, but the photometer will not be optimized at this wavelength. This system is expected to be operational on the CSO in January 1994.

Type
3. Astronomical Results and Prospects
Copyright
Copyright © Astronomical Society of the Pacific 1994

References

Ruhl, J. and Dragovan, M., 1991. Low Temperature Detectors for Neutrinos and Dark Matter, ed. Booth, N.E., and Salmon, G.L., Conf. Proc. 4, 461.Google Scholar