CANGAROO‐III Observations of the 2006 Outburst of PKS 2155−304
Citations Over TimeTop 10% of 2008 papers
Abstract
We have used the CANGAROO-III imaging atmospheric Cerenkov telescopes to observe the high-frequency-peaked BL Lacertae (HBL) object PKS 2155-304 between 2006 July 28 (MJD 53,944) and August 2, triggered by the H.E.S.S. report that the source was in a high state of TeV gamma-ray emission. A signal was detected at the 4.8 σ level in an effective live time of 25.1 hr during the outburst period. The flux of very high energy gamma rays from the CANGAROO-III observations shows variability on the timescale of less than a few hours. The averaged integral flux above 660 GeV is (1.6 ± 0.3stat ± 0.5syst) × 10-11 cm-2 s -1, which corresponds to ∼45% of the flux observed from the Crab Nebula. Follow-up observations between August 17 (MJD 53,964) and 25 indicate that the source activity had decreased.
Related Papers
- → VERITAS OBSERVATIONS OF THE BL LAC OBJECT 1ES 1218+304(2009)69 cited
- MAGIC discovers VHE gamma-ray emission from the blazar 1ES 1727+502(2012)
- → BL Lac object 1ES 0647+250, a decade of MWL observations(2021)1 cited
- → On the Crab Nebula VHE gamma-ray flux(1995)6 cited