Upper limits on narrow annihilation lines in. gamma. -ray bursts

Conference · Fri Dec 31 23:00:00 EST 1982 · AIP Conf. Proc.; (United States)

OSTI ID:5969975

Nolan, P L; Share, G H; Forrest, D J; Chupp, E L; Matz, S; Rieger, E

The SMM ..gamma.. ray experiment has observed 60 ..gamma..-ray bursts from March 1980 to August 1982. Details of one burst are illustrated. There is weak evidence for a broadened spectral feature early in the burst which was also detected by the Konus experiment. The detailed search was limited to narrow lines (< 70 keV FWHM) near 500 keV; none were found in any of the bursts. This absence contrasts with the reported detection of several broader features. The implication are discussed for the physical conditions in the annihilation region. 11 references, 4 figures.

• Research Organization: Naval Research Lab., Washington, DC
• OSTI ID: 5969975
• Report Number(s): CONF-830136-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 101; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics &amp; Cosmology-- Quasi-Stellar
Radio
&amp; X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
COSMIC GAMMA BURSTS
COSMIC RADIATION
DOPPLER EFFECT
ELECTROMAGNETIC INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
EMISSION SPECTRA
FERMIONS
INTERACTIONS
IONIZING RADIATIONS
LEPTONS
LIMITING VALUES
LINE BROADENING
NEUTRON STARS
ORIGIN
POSITRONS
PRIMARY COSMIC RADIATION
RADIATIONS
RESOLUTION
SPECTRA
STARS
TIME RESOLUTION
TIMING PROPERTIES