Stereoscopic Observations With The Cangaroo-Iii Telescopes At The Large Zenith Angles

CANGAROO-III is a stereoscopic observation system with four telescopes, which started full operation in March 2004. We have observed the Crab nebula in 2003 at zenith angles > 55 degrees because our telescopes are located in the southern hemisphere. The observations were made with an independent trigger mode using two telescopes. In the case of larger distances between showers and telescopes, events have a lower accuracy on the determination of intersection points, which degrades the theta-squared distributions. We are, therefore, trying to improve analysis methods. We report the current results of these observations and the performance of our system compared with Monte Carlo simulations.