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Preprint 20/02


Schuh, S.L. (1,2), Nagel, T. (1,2), Deetjen, J.L. (1,2), Dreizler, S. (1,2), Handler, G. (2), O'Brien, M.S. (2), Riddle, R. (2), Hürkal, Ö. (2), Pakstiene, E. (2), Klumpe, E. (2), Lawrence, T. (2), Vuckovic, M. (2), Zola, S. (2), Kawaler, S. (2), Kanaan, A. (2), Giovaninni, O. (2), Kepler, S.O. (2), Mukadam, A. (2), Provencal, J. (2), Nitta, A. (2), Shipman, H. (2), Mullally, F. (2), Grauer, A. (2), Wood, M.A. (2), Bradley, P.A. (2), Kilic, M. (2), Sekiguchi, K. (2), Crowe, R. (2), Sullivan, D. (2), Rosen, R. (2), Clemens, C. (2), Xiaojun, J. (2), Janulis, R. (2), O'Donoghue, D. (2), Ogloza, W. (2), Baran, A. (2), Silvotti, R. (2), Marinoni, S. (2), Vauclair, G. (2), Dolez, N. (2), Chevreton, M. (2), Gonzalez, J.M. (2), Solheim, J.-E. (2), Ulla, A. (2), Burleigh, M. (2), Good, S. (2), Metcalfe, T. (2), da Costa, A.F.M. (2), Costa, J.E.S. (2), Kim, S.-L. (2), Lee, H. (2), Sergeev, A. (2), Akan, C. (2), Cakirli, Ö. (2), Paparo, M. (2), Viraghalmy, G. (2)

(1) Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Sand 1, D-72076 Tübingen, Germany
(2) The Whole Earth Telescope collaboration

In: Proc. XIII Workshop on White Dwarfs, Kluwer Academics NATO Science Series, eds. D. de Martino, R. Silvotti, J.-E. Solheim and R. Kalytis, 105, 263(2003)

Abstract. The Whole Earth Telescope had been initiated as a collaboration of midsize telescopes, equipped with high-speed photometers, covering different ranges of longitudes as completely as possible (Nather et al., 1990). To resolve the frequency spectrum of a star rapidly pulsating in multiple modes, it is necessary to avoid the severe problem of aliasing (introduced at single sites by the day-night cycle in the frequency range of interest) by uninterrupted monitoring. Since CCD cameras as an alternative instrumentation have also started to contribute to these world-wide coordinated observing campaigns, the Calar Alto 1.2 m telescope has repeatedly been used to participate in WET runs. The WET Xcov22 campaign in May 2002 marked the last opportunity where this was possible since the telescope will in the future not be available to the German-Spanish astronomical community as a whole any more.

Key words: -

Paper (41k gzip'ed Postscript including figures)

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