Muon astronomy with the MACRO detector

Details Muon astronomy with the MACRO detector Muon astronomy with the MACRO detector

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412..301a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 412, no. 1, p. 301-311.

Astronomy and Astrophysics

Astrophysics

18

Muons, Nuclear Astrophysics, Radiation Detectors, Relic Radiation, Frequency Distribution, Monte Carlo Method, Point Sources, Sky Surveys (Astronomy), X Ray Sources

Scientific paper

We have analyzed a sample of 1.8 x 10 exp 6 muons with E(mu) greater than about 1.3 TeV collected by the first and second supermodules of the MACRO detector at Gran Sasso during the period 1989 February to 1991 February. We have searched for an excess of muons of celestial origin over cosmic-ray background. Our search for steady sources in solid angle bins of 3.0 x 3.0 deg in the declination range -5 to 90 deg was negative; the upper limit with 95 percent C.L. to the muon flux at midlatitudes is less than about 2 x 10 exp -12/sq cm s. In addition, we have searched for muon excesses modulated by the orbital period of selected X-ray sources, including Cyg X-3, Cyg X-1, Her X-1, 4U 0115 + 63, and 4U 1907 + 09. We have no evidence of any bursting activity from Cyg X-3, during our search period, which includes the radio outburst of 1991 January.

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