Very High Energy Gamma-Ray Observation of Southern AGNs with CANRAGOO-II Telescope

Details Very High Energy Gamma-Ray Observation of Southern AGNs with CANRAGOO-II Telescope Very High Energy Gamma-Ray Observation of Southern AGNs with CANRAGOO-II Telescope

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....7.2626n&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

4

Scientific paper

The high-energy peaked BL Lacs (HBLs) PKS 2005-489 and PKS 2155-304 have been observed using the CANGAROO-II imaging atmospheric Cherenkov telescope between July and October 2000. Our estimates of the threshold energy of the analysed data are ˜400 GeV for PKS 2155 -304 and ˜450 GeV for PKS 2005-489. These HBLs remained in a low state during our observations. No statistically significant excess of events from the direction of either HBL was found. The derived 2σ flux upper limits for gamma-ray emission are 1.2 × 10-11 cm-2 s-1 above 400 GeV for PKS2155-304 and 6.4 × 10-12 cm-2 s-1 above 450 GeV for PKS2005-489. Some parts of the observations were carried out during multiwavelength campaigns.

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