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J.H. Buckley (Washington University), Whipple Collaboration
We report on recent observations of E>300 GeV \gamma-rays from Blazars made with the Whipple Observatory 10m \gamma-ray telescope. The Whipple telescope has now observed \gamma-ray emission at E>300~GeV from the BL Lac objects Mrk~421, Mrk~501 and 1ES2344+514. Here we give an update on the status of Whipple observations including measurements of rapid (sub hour-scale) \gamma-ray variability at very high energies; observations of correlated variability in \gamma-ray, X-ray, UV and optical wavebands; and measurements of the \gamma-ray spectra of AGNs. We also present upper limits on the VHE emission of other blazars. These results are used to derive constraints on the physical conditions in the blazar jets, the emission mechanism, and the level of the diffuse extragalactic IR radiation.
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