AAS 195th Meeting, January 2000
Session 88. Space Missions and Techniques
Display, Friday, January 14, 2000, 9:20am-6:30pm, Grand Hall

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[88.16] Workshop on the Strömvil Photometric System

A. G. Davis Philip (ISO & Union College), V. Straizys (ITPA, Lithuania), E. H{ø}g (Copenhagen University Observatory)

On October 6 - 8 a workshop on the Strömvil Photometric System was held in Vilnius and at the Moletai Observatory in Lithuania. Papers were given concerning the creation and use of the system, its special abilities to recognize stars of all spectral types and peculiarities even in the case of areas with high values of interstellar reddening. Reports were made on studies of synthetic photometry to investigate the classification properties of photometric systems. The photometric design of the planned GAIA orbiting observatory was outlined. Current observations being made in the system on the Vatican Advanced Technology Telescope were described and plans for future work at this site were discussed. The members of the workshop agreed on the following recommendations: A. All the groups cooperating in Strömvil measures should use common observing and reduction procedures. In reduction this means using IRAF and DAOPHOT. B. A database will be set up at ITPA which will contain information from each observatory concerning the CCD chip(s) being used, the observers and the details of observations made at that site. Data on standard stars and regions as well as areas used for scientific studies will be included. C. Error ellipses (from studies with synthetic photometry calibrated in temperature and log g) will be calculated for the various systems being proposed for GAIA, for stars of V = 16 and 18 magnitude. The choice of a photometric system for GAIA should be based on the classification abilities of the system. Since the satellite will observe stars in areas which are heavily reddened the system must be able to correct for reddening effects. D. The Workshop members recommended that a meeting be held in 2000 to discuss the properties of photometric systems proposed for GAIA and the methods by which a choice of the final system for GAIA should be made.

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