Search for Very High Energy Gamma Rays from an X-ray

In recent years, blazar surveys at radio and X-ray energies have greatly increased our understanding of this type of active galaxy. The combination of multi-wavelength data has shown that blazars follow a well defined sequence in terms of their broad band spectral properties. Together with increasingly detailed emission models, this information has provided not only tools with which to identify potential sources of TeV emission but also predictions of their gamma-ray flux. A list of such candidates has been used in this work to investigate the best targets for TeV observations. Observations reported here have resulted in upper limits which do not conflict with the latest model predictions.