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We present the analysis on our new limits of the dark matter (DM) haloconsisting of primordial black holes (PBHs) or massive compact halo objects(MACHOs). We present a search of the first two years of publicly availableKepler mission data for potential signatures of gravitational microlensingcaused by these objects, as well as an extensive analysis of the astrophysicalsources of background error. These include variable stars, flare events, andcomets or asteroids which are moving through the Kepler field. We discuss thepotential of detecting comets using the Kepler lightcurves, presentingmeasurements of two known comets and one unidentified object, most likely anasteroid or comet. After removing the background events with statistical cuts,we find no microlensing candidates. We therefore present our Monte Carloefficiency calculation in order to constrain the PBH DM with masses in therange of 2 x 10^-9 solar masses to 10^-7 solar masses. We find that PBHs inthis mass range cannot make up the entirety of the DM, thus closing a fullorder of magnitude in the allowed mass range for PBH DM.

Experimental Limits on Primordial Black Hole Dark Matter from the First Two Years of Kepler Data