AzTEC: A New Millimeter-Wave Camera

Physics – Optics

Scientific paper

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Scientific paper

AzTEC is a large-format bolometer array camera developed at the University of Massachusetts, Amherst, and will serve as one of the first facility instruments of the Large Millimeter Telescope (LMT). AzTEC’s detector array is comprised of 144 silicon nitride micromesh bolometers with a bandpass defined through a series of changeable filters and coupling optics. AzTEC was recently commissioned at 1.1 millimeters on the James Clerk Maxwell Telescope (JCMT) and successfully completed its first science-grade observing run in the winter 2005/2006. We experienced excellent performance throughout the run, with a median raw per-pixel sensitivity to point-like sources of 14 mJy √s. We present the instrument design and achieved specifications, as well as the nature of AzTEC data and its format. We also discuss calibration and observing strategies for using the AzTEC instrument.

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