CANGAROO-III Search for Gamma Rays from Centaurus A and the $ω$ Centauri Region

Details CANGAROO-III Search for Gamma Rays from Centaurus A and the $ω$ Centauri Region CANGAROO-III Search for Gamma Rays from Centaurus A and the $ω$ Centauri Region

2007-06-04

arxiv.org/abs/0706.0367v1

ApJ, 668 (2007) 968-973

Astronomy and Astrophysics

Astrophysics

7 pages, 6 figures, to appear in ApJ, emulateapj.cls

Scientific paper

10.1086/520767

We have observed the giant radio galaxy Centaurus A and the globular cluster $\omega$ Centauri in the TeV energy region using the CANGAROO-III stereoscopic system. The system has been in operation since 2004 withan array of four Imaging Atmospheric Cherenkov Telescopes (IACT) with $\sim$100-m spacings. The observations were carried out in March and April 2004. In total, approximately 10 hours data were obtained for each target.No statistically significant gamma-ray signal has been found above 420 GeV over a wide angular region (a one-degree radius from thepointing center) and we derive flux upper limits using all of the field of view.Implications for the total energy of cosmic rays and the density of the cold dark matter are considered.

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