Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/71078
Type: Artigo de periódico
Title: RESULTS ON CANDIDATE UHE GAMMA-RAY SOURCES BY THE EAS-TOP ARRAY (1989-1993)
Author: AGLIETTA, M
ALESSANDRO, B
ANTONIOLI, P
ARNEODO, F
BERGAMASCO, L
FAUTH, AC
CASTAGNOLI, C
CASTELLINA, A
CHIAVASSA, A
CINI, G
PIAZZOLI, BD
DISCIASCIO, G
FULGIONE, W
GALEOTTI, P
GHIA, PL
IACOVACCI, M
MANNOCCHI, G
MORELLO, C
NAVARRA, G
RICCATI, L
SAAVEDRA, O
TRINCHERO, GC
VALLANIA, P
VERNETTO, S
Abstract: A search for UHE gamma-rays from 13 candidate point sources observable in the northern hemisphere (the Crab Nebula and Pulsar, Cygnus X-3, Hercules X-1, Geminga and others) has been performed by the EAS-TOP array during four years of operation since January 1989 to December 1993, at different energy thresholds (E(0) = 30-300 TeV). DC, periodic and sporadic emissions have been studied, and no evidence for significant excesses has been found from any of these searches. The derived 90% c.l. upper limits to the d.c. flux, for a source culminating at the zenith such as Cygnus X-3, are Phi(E > 230 TeV) < 2 x 10(-14) cm(-2) s(-1), Phi(E > 90 TeV) < 4.1 x 10(-14) cm(-2) s(-1) and Phi(E > 25 TeV) < 1.9 x 10(-13) cm(-2) s(-1). The excess from the Crab Nebula of February 23, 1989, as reported by the EAS-TOP, Baksan and KGF arrays, remains the only sporadic excess detected with statistically significant confidence level (probability of background imitation approximate to 10(-5)).
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/0927-6505(94)00026-Y
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOSA1995QM19700001.pdf1.14 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.