Abstract
A shadow of the Moon, with a statistical significance of has been observed in the underground muon flux at a depth of 2090 mwe using the Soudan 2 detector. The angular resolution of the detector is well described by a Gaussian with a sigma The position of the shadow confirms that the alignment of the detector is known to better than and has remained stable during ten years of data taking.
- Received 19 May 1999
DOI:https://doi.org/10.1103/PhysRevD.61.092002
©2000 American Physical Society