Observations of ultra-high-energy photons from Cygnus X-3

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170085· OSTI ID:5589107

Muraki, Y; Shibata, S; Aoki, T; Mitsui, K; Okada, A ^[1]

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1. Nagoya University (Japan) Tokyo, University (Japan)

Extensive air showers coming from the Cygnus X-3 region are analyzed using the van der Klis and Bonnet-Bidaud ephemeris. A 4.7 sigma excess has been observed in the phase bin 0.25-0.3. The maximum excess is seen when a muon cut is applied to the showers, which indicates a slightly muon poor property. The flux is estimated to be (2.7 + or {minus} 0.5) {times} 10 to the -14th/sq cm s for the showers Ne greater than 200,000. DC excesses are observed at the time of the radio burst of Cygnus X-3 in June 1989. 21 refs.

• OSTI ID: 5589107
• Journal Information: Astrophysical Journal; (United States), Vol. 373; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EXTENSIVE AIR SHOWERS
ORIGIN
BINARY STARS
COSMIC GAMMA BURSTS
COSMIC X-RAY SOURCES
MASS
MUONS
RADIATION DETECTORS
RADIATION FLUX
RADIOWAVE RADIATION
COSMIC RADIATION
COSMIC RAY SOURCES
COSMIC SHOWERS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
IONIZING RADIATIONS
LEPTONS
MEASURING INSTRUMENTS
PRIMARY COSMIC RADIATION
RADIATIONS
SECONDARY COSMIC RADIATION
SHOWERS
STARS
640101* - Astrophysics & Cosmology- Cosmic Radiation