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Session 54 - Ground and Instrumentation Techniques and Catalogs.
Display session, Wednesday, June 12
Tripp Commons,
Measurements on the local seeing have been carried out during two and a half yea rs (March 29, 1992 to October 7, 1994), over a total of 378 nights. The Site Tes ting Telescope (STT) from the Steward Observatory yields a median seeing of 0.61 arcsec and a first quartile of 0.50 arcsec. Additional measurements with the Carnegie Monitor (CM), many of them done simultaneously with the STT, yield almost identical results. The Micro--Thermal Array (MTA), also from Steward Observatory, show that the seeing size decreases about 0.1 arcsec at 15 meters above the ground. The seeing does not show any dependence on wind velocity or direction, at least for wind velocities smaller than 40 kilometers per hour. We will present the details of these results. The participation of several persons in this project is here acknowledge, especially that of R. Cromwell and N. Wolf, from Steward Observatory, and S.E. Persson and D.M. Carr, from The Observatories of the Carnegie Institution of Washington.
