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Performance of the MACRO detector at gran sasso: Moon shadow and seasonal variations
Journal article   Open access

Performance of the MACRO detector at gran sasso: Moon shadow and seasonal variations

N. Giglietto, M. Ambrosio, R. Antolini, G. Auriemma, R. Baker, A. Baldini, G.C. Barbarino, B.C. Barish, G. Battistoni, R. Bellotti, …
Nuclear physics. Section B, Proceedings supplement, v 61(3), pp 180-184
1998
url
https://doi.org/10.1016/s0920-5632(97)00559-8View
Published, Version of Record (VoR)CC BY-NC-ND V4.0 Open
url
https://doi.org/10.1016/S0920-5632(97)00559-8View
Published, Version of Record (VoR) Open

Abstract

The MACRO underground detector at Grarl Sasso has recorded about 30 million muon events in the period 1989–1995. We have analyzed these data to look for time variations and to study the pointing capabilities of the apparatus in the search for astrophysical point sources. We have observed a 3% seasonal variation of the high energy muon rate, due to atmospheric temperature variations, in agreement with theoretical predictions. We report also the detection of the moon shadowing effect with a statistical significance of 3.7 σ. The results obtained straighten the possibility that a “muon astronomy” using underground experiments is possible.

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