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We have searched for very high energy (VHE) gamma rays from four blazarsusing the CANGAROO-III imaging atmospheric Cherenkov telescope. We report theresults of the observations of H 2356-309, PKS 2155-304, PKS 0537-441, and 3C279, performed from 2005 to 2009, applying a new analysis to suppress theeffects of the position dependence of Cherenkov images in the field of view. Nosignificant VHE gamma ray emission was detected from any of the four blazars.The GeV gamma-ray spectra of these objects were obtained by analyzing Fermi/LATarchival data. Non-simultaneous wide range (radio to VHE gamma-ray bands)spectral energy distributions (SEDs) including CANGAROO-III upper limits, GeVgamma-ray spectra, and archival data are discussed using a one-zone synchrotronself-Compton (SSC) model in combination with a external Compton (EC) radiation.The HBLs (H 2356-309 and PKS 2155-304) can be explained by a simple SSC model,and PKS 0537-441 and 3C 279 are well modeled by a combination of SSC and ECmodel. We find a consistency with the blazar sequence in terms of strength ofmagnetic field and component size.

Searches for very high energy gamma rays from blazars with CANGAROO-III telescope in 2005-2009