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The MACHO Project collected photometry of many RR Lyrae stars from itsobservations of the Milky Way's bulge. We examined the lightcurves of 3256stars identified as RRab Lyr variables by \cite{Kund2008}, subtracting anempirical model of the pulsation lightcurve and searching for periodicvariation in the residuals. There are no systems which show the brief dips inlight characteristic of detached eclipsing binary systems. We discuss theresults for objects which show the largest residual periodic modulation, mostof which are probably due to aliases of the fundamental period.

A Search for Eclipsing Binary Lightcurve Variations among MACHO Project Lightcurves of 3256 Fundamental-Mode RR Lyrae Variables in the Galactic Bulge