Confining the Edges of the GW Vir Instability Strip

K. Werner1, T.Rauch1, S.Dreizler2, U.Heber2

1Institut für Astronomie und Astrophysik der Universität, D-24098 Kiel, Germany
2Dr. Remeis Sternwarte, Universität Erlangen-Nürnberg, 96049-Bamberg, Germany

Ground based optical spectroscopy as well as EUVE and HST observations are used for model atmosphere analyses of PG 1159 stars in order to confine the GW Vir instability strip.

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