Observation of the shadowing of cosmic rays by the Moon using a deep underground detector
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Using data collected by the MACRO experiment during the years 1989–1996, we show evidence for the shadow of the Moon in the underground cosmic ray flux with a significance of 3.6σ. This detection of the shadowing effect is the first by an underground detector. A maximum-likelihood analysis is used to determine that the angular resolution of the apparatus is [Formula Presented] These results demonstrate MACRO’s capabilities as a muon telescope by confirming its absolute pointing ability and quantifying its angular resolution. © 1998 The American Physical Society.
author list (cited authors)
Ambrosio, M., Antolini, R., Aramo, C., Auriemma, G., Baldini, A., Barbarino, G. C., ... Webb, R.