AAS 198th Meeting, June 2001
Session 61. Optical Interferometry I - CHARA
Display, Wednesday, June 6, 2001, 10:00am-7:00pm, Exhibit Hall

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[61.06] Commissioning Observations for the CHARA Array

T.A. ten Brummelaar, H.A. McAlister, S.T. Ridgway, N.H. Turner, L. Sturmann, J. Sturmann, W.G. Bagnuolo, M. Hrynevych, M.A. Shure (CHARA - Georgia State Univserity)

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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