Limits on the Cosmological Abundance of Supermassive Compact Objects from a Millilensing Search in Gamma-Ray Burst Data Robert J. Nemiroff, Gabriela F.

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Presentation transcript:

Limits on the Cosmological Abundance of Supermassive Compact Objects from a Millilensing Search in Gamma-Ray Burst Data Robert J. Nemiroff, Gabriela F. Marani, (Michigan Tech) (NRC, NASA) Jay P. Norris, & Jerry T. Bonnell (NASA’s GSFC) (USRA, NASA)

GRBs Limit the Universe zOne of the few definitive things GRBs have ever told us about our universe zLargest millilensing search ever: cleanest 774 GRBs from all triggered BATSE. zNo millilensing: y  _compact < 0.1 for 10 5 < M/Mo < 10 9 y  _compact < 0.01 near 10 7 Mo zDark matter is not very large black holes.