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Comparision of Light Variability and Water Maser Emission in T Ursae Majoris

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Tara C. Woods

Irene Little-Marenin

Priscilla J. Benson

Astronomy Department, Whitin Observatory, Wellesley College, Wellesley, MA 02181

Received 21 November 1988

Abstract

We have observed 22 GHz water maser emission for T UMa at Haystack Observatory about once a month since December 14, 1986. The data have been compiled and graphed as a function of time and compared to the visual data compiled by the AAVSO. The variablilty of the maser emission and the visual light is comparable, but the maser emission shows a phase lag of 0.35 phase with respect to the visible.