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Titolo:
A SEARCH FOR ULTRA-HIGH ENERGY COUNTERPARTS TO GAMMA-RAY BURSTS
Autore:
PLUNKETT SP; DELANEY M; MCBREEN B; HURLEY KJ; OSULLIVAN CT;
Indirizzi:
UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND NATL UNIV IRELAND UNIV COLL DUBLIN,DEPT PHYS DUBLIN 4 IRELAND UNIV COLL CORK,DEPT PHYS CORK IRELAND
Titolo Testata:
Astrophysics and space science
fascicolo: 1-2, volume: 231, anno: 1995,
pagine: 271 - 276
SICI:
0004-640X(1995)231:1-2<271:ASFUEC>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASTRONOMY;
Keywords:
GAMMA RAYS, BURSTS; GAMMA RAYS, HIGH ENERGY; AIR SHOWERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
S.P. Plunkett et al., "A SEARCH FOR ULTRA-HIGH ENERGY COUNTERPARTS TO GAMMA-RAY BURSTS", Astrophysics and space science, 231(1-2), 1995, pp. 271-276

Abstract

A small air shower array operating over many years has been used to search for ultra-high energy (UHE) gamma radiation (greater than or equal to 50 TeV) associated with gamma-ray bursts (GRBs) detected by the BATSE instrument on the Compton Gamma-Ray Observatory (CGRO). Upper limits for a one minute interval after each burst are presented for seven GRBs located with zenith angles theta < 20 degrees. A 4.3 sigma excess over background was observed between 10 and 20 minutes following the onset of a GRB on 11 May 1991. The confidence level that this is dueto a real effect and not a background fluctuation is 99.8%. If this effect is real then cosmological models are excluded for this burst because of absorption of UHE gamma rays by the intergalactic radiation fields.

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Documento generato il 20/09/20 alle ore 07:38:28