Commissioning Observations for the CHARA Array

Details Commissioning Observations for the CHARA Array Commissioning Observations for the CHARA Array

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.6106t&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #61.06; Bulletin of the American Astronomical Society, Vol. 33, p.877

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Scientific paper

We present preliminary scientific results using the prototype IR beam combiner of the CHARA Array. These data are currently acquired using the smallest North/South baseline of 34m. The prototype detection system uses single pixel InSb devices which are noisy and fairly insensitive. A new IR camera will be installed this spring and should improve our magnitude limit substantially. The commissioning observations, still under way, are returning angular diameters consistent with those in the literature, and evidence in some cases for strong limb darkening. In the case of Mira stars, evidence for the extreme atmospheric extension is found in very broad, quasi-Gaussian visibility curves. These and other data will be presented in the poster. The CHARA Array, a six-telescope O/IR interferometric array operated by Georgia State University on Mt. Wilson, California, was funded by the National Science Foundation, the W.M. Keck Foundation, the David and Lucile Packard Foundation, and Georgia State University.

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