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Session 103 - Cool Stars.
Display session, Thursday, January 18
North Banquet Hall, Convention Center

[103.17] Past Dust Events and Current Light Curve for the RCB Star Z Ursa Minoris

E. Rosolowsky (Swarthmore C.), P. Benson (Wellesley C.)

The history of dust events for the newly discovered RCB star, Z Ursa Minoris, has been investigated by examining 833 photographic plates taken of the star by the Harvard Observatory Patrol. Fourteen individual dust events spaced randomly throughout the examined time period from 1928 to 1989 were found. We will also show a current light curve of Z Ursa Minoris from April 1992 to the present.

We thank Martha Hazen and Harvard University for the use of the plate stacks. We thank the W. M. Keck Foundation for ER's summer internship and the support of astronomy at Swarthmore and Wellesley through the Keck Northeast Astronomy Consortium. PJB thanks the Center for Astrophysics and the Bunting Institute for hospitality and support during much of the work of this paper.

Program listing for Thursday