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

Abstract

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.

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

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Cited by in corpus (21)

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• Observation of Very High Energy Gamma Rays from HESS J1804-216 with CANGAROO-III Telescopes
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• Recent Topics on Very High Energy Gamma-ray Astronomy
• Centaurus A at Ultra-High Energies
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• Very high energy neutrino expectation from Fanaroff-Riley I sources