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Table 1

Estimated system equivalent flux densities (SEFD) at 1.3 mm.

Facility acronym Facility name Antennas Diameter SEFD
(m) (Jy)

Hawaii 3 facilities are phased: Caltech Submillimeter Observatory (CSO),
James Clerk Maxwell Telescope (JCMT) and Submillimeter Array (SMA) 8 23 4900
CARMA Combined Array for Research in Millimeter Wave Astronomy 8 27 6500
SMTO Arizona Radio Observatory Submillimeter Telescope 1 10 11 900
LMT Large Millimeter Telescope 1 32 10 000a
APEX Atacama Pathfinder Experiment 1 12 6500
ALMA Atacama Large Millimeter Array (ALMA) 10 38 500
IRAM-PV 30-m Institut de Radioastronomie Millimétrique telescope on Pico Veleta 1 30 2900
IRAM-PdB Institut de Radioastronomie Millimétrique interferometer on Plateau de Bure 6 15 1600

Notes. The diameter is the effective aperture when the given number of antennas are phased together. The expected SEFD values for observations of Sgr A* include typical weather conditions and opacities.

(a)

Upgrades to the dish and receiver will lower the SEFD of the LMT by a factor of ~10.

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