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Period Change, Spot Migration and Orbital Solution for the Eclipsing Binary AR Lac

Munari, U.; Siviero, A.; Dallaporta, S.

We present a new large set of photoelectric photometric measurements (1806 in V and 1367 in B passbands) of the eclipsing RS CVn-type system AR Lac covering the period 2000 June 28 to 2005 October 13. 13 new epochs of minima have been derived that allows us to update the complex O--C pattern of this binary, now monitored for more than a hundred ye…