TeV Gamma Ray Astronomy and GLAST

The Large Area Telescope (LAT) on the Gamma-ray Large Area Space Telescope (GLAST) will have sensitivity to gamma rays beyond 100 GeV, for the first time providing a data set overlapping with the energy range of ground based gamma ray instruments. The next generation of Imaging Atmospheric Cherenkov Telescopes (IACTs), including MAGIC, HESS, and VERITAS, will therefore be complemented by the GLAST survey dataset. The GLAST large field of view will provide a survey of the high energy sky, providing the IACTs with a large number of potential sources to observe. In addition, GLAST observations can be used to cross-calibrate the IACT energy scale and flux measurements, potentially reducing their systematic uncertainty. Together GLAST and IACTs will be able to probe gamma ray spectra from 20 MeV to the multi - TeV regime.