Multiwavelength Observations of Intermediate-Frequency-Peaked BL Lac Objects Detected. by VERITAS

摘要

We report on the discovery of very high energy (VHE) emission . (E > 200 GeV) from the intermediate-frequency-peaked BL Lac (IBL) objects PKS 1424+240, W Comae and 3C 66A by VERITAS. These IBL objects bridge the gap between low-energy-peaked and high-energy-peaked BL Lacs and are the first of their kind to be detected in this energy band. We present results on the energy spectra measured by VERITAS for W Comae and 3C 66A. Observation of these objects in flaring states prompted quasi-simultaneous observations in other wavebands. These MWL data, allow the fitting of models to the double-peaked SED, in order to test how well the models describe the data and determine characteristics of the particle populations emitting these VHE photons. We alsoi, present the first detection of PKS 1424+240 in VHE gamma rays.