
%0 Journal Article
%A Nishijima, Kyoshi 
%T Very High Energy Gamma-ray Observations of AGN with CANGAROO
%J Publications of the Astronomical Society of Australia
%D 2002/06/28
%V 19
%N 1
%P 26-28
%K BL Lacertae objects: individual (Mrk 421, PKS 2005&#8211;489, PKS 2155&#8211;304) &#8212; galaxies: active &#8212; gamma rays: observations
%R https://doi.org/10.1071/AS01089
%U https://www.publish.csiro.au/paper/AS01089 
%X We have observed eight AGN since 1993 in the energy region above several hundred GeV using the CANGAROO telescopes. We observed Mrk 421 for ten nights with the CANGAROO-II 10 m telescope during its active state in early 2001 using the very large zenith angle technique. Our preliminary result implies the detection of gamma-ray emission from Mrk 421 in the energy range above 9.3 TeV. The high energy peaked BL Lacs (HBLs) PKS 2005&#8211;489 and PKS 2155&#8211;304 have been also observed. No statistically significant signals are found for both HBLs and flux upper limits are obtained. A summary of results of observations of AGN is presented in this paper. 
