Query: What are the blazars observed in the discovery program ?
Source: 1001.0770.pdf
Relevant passages:
The blazars observed in the discovery program are  largely high-frequency-peaked BL Lac objects. How ever, the program also includes IBLs (intermediate peaked) and LBLs (low-peaked), as well as flat spec trum radio quasars (FSRQs), in an attempt to in crease the types of blazars known to emit VHE γ-rays.