Tuesday, July 31, 2007, 3:30 pm — Large Seminar Room, Bldg. 510
The field of VHE gamma-ray astronomy (E_gamma ~ 0.1-10 TeV) has grown tremendously in the last several years due to large increases in detector sensitivity and exposure. Higher photon statistics have allowed the study of rapid time variability of source emission and spectra, providing important insight into the production mechanisms and propagation effects of VHE gamma rays. In this talk I will describe the technique of ground-based VHE gamma ray astronomy, including the status of the VERITAS gamma ray observatory. I will also describe recent observations by VERITAS (and others) on pulsar wind nebulae, supernova remnants, Active Galactic Nuclei, and microquasars. Although emission and propagation effects are clearly observed in these measurements, the exact origin of the VHE emission remains uncertain. Finally, I will describe open questions in VHE gamma ray astronomy, including the recent detection of new, unidentified VHE gamma ray emitters.
Hosted by: Helio Takai
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