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Titolo:
A MEASUREMENT OF THE SOLAR AND SIDEREAL COSMIC-RAY ANISOTROPY AT E(0)SIMILAR-TO-10(14)EV
Autore:
AGLIETTA M; ALESSANDRO B; ANTONIOLI P; ARNEODO F; BERGAMASCO L; BERTAINA M; BOSIO A; CASTELLINA A; CASTAGNOLI C; CHIAVASSA A; CASTAGNOLI GC; PIAZZOLI BD; DISCIASCIO G; FULGIONE W; GALEOTTI P; GHIA PL; IACOVACCI M; MANNOCCHI G; MELAGRANA C; SILVA NM; MORELLO C; NAVARRA G; RICCATI L; SAAVEDRA O; TRINCHERO GC; VALLANIA P; VERNETTO S;
Indirizzi:
CNR,IST COSMOGEOFIS,CORSO FIUME 4 I-10133 TURIN ITALY IST NAZL FIS NUCL,SEZ TORINO I-10125 TURIN ITALY IST NAZL FIS NUCL,SEZ BOLOGNA I-40126 BOLOGNA ITALY UNIV AQUILA,DIPARTIMENTO FIS I-67010 COPPITO AQUILA ITALY IST NAZL FIS NUCL,LAB NAZL GRAN SASSO I-67010 ASSERGI AQUILA ITALY UNIV TURIN,DIPARTIMENTO FIS GEN I-10125 TURIN ITALY UNIV NAPLES,DIPARTIMENTO SCI FIS I-80125 NAPLES ITALY IST NAZL FIS NUCL I-80125 NAPLES ITALY UNIV ESTADUAL CAMPINAS,INST FIS BR-13081 CAMPINAS SP BRAZIL
Titolo Testata:
The Astrophysical journal
fascicolo: 1, volume: 470, anno: 1996,
parte:, 1
pagine: 501 - 505
SICI:
0004-637X(1996)470:1<501:AMOTSA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOP;
Keywords:
COSMIC RAYS; GALAXY, GENERAL; SOLAR SYSTEM, GENERAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
M. Aglietta et al., "A MEASUREMENT OF THE SOLAR AND SIDEREAL COSMIC-RAY ANISOTROPY AT E(0)SIMILAR-TO-10(14)EV", The Astrophysical journal, 470(1), 1996, pp. 501-505

Abstract

The results of the measurement of the cosmic-ray solar and sidereal anisotropies at primary energy E(0) approximate to 10(14) eV performed by the EAS-TOP Extensive Air Shower array (Campo Imperatore, National Gran Sasso Laboratories, 2005 m above sea level, latitude 42 degrees.5N are presented. The measurement includes 4 years of data taking (1990, 1992, 1993, 1994) for a total of 1.3 x 10(9) events and is performed at two different mean primary energies: (E) over bar(0)(v) approximate to 1.5 x 10(14) eV and (E) over bar(0)(i) approximate to 2.5 x 10(14) eV. The two results are compatible (within 2 sigma) and can therefore be combined. The obtained amplitude and phase of the first harmonicin sidereal time are (in the equatorial plane) A(sid,delta=0c)((E) over bar(0) approximate to 2 x 10(14) eV) = (3.73 +/- 0.57) x 10(-4) andphi(sid) = 1.82 +/- 0.49 hr local sidereal time, with significance 6.5 sigma. The amplitude of the anisotropy exhibits the expected cos delta dependence. A first harmonic in solar time compatible with the expected Compton-Getting effect due to the motion of revolution of the Earth around the Sun is observed with significance 7.3 sigma. The corresponding measured amplitude and phase (also in the equatorial plane) areA(sol,delta=0o)=(4.06 +/- 0.55) x 10(-4) and phi(sol) = 4.92 +/- 0.53hr, the expected values being 4.7 x 10(-4) and 6.0 hr. Different checks of stability of the detectors and consistency of the data are presented.

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Documento generato il 23/11/20 alle ore 21:31:30