Performance of the MACRO detector at Gran Sasso: Moon shadow and seasonal variations

Details Performance of the MACRO detector at Gran Sasso: Moon shadow and seasonal variations Performance of the MACRO detector at Gran Sasso: Moon shadow and seasonal variations

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nuphs..61..180g&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 61, Issue 3, p. 180-184.

Physics

Nuclear Physics

Scientific paper

The MACRO underground detector at Gran 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 3.7σ. The results obtained straighten the possibility that a ``muon astronomy'' using underground experiments is possible.

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