Observations of X-ray and gamma bursts

Details Observations of X-ray and gamma bursts Observations of X-ray and gamma bursts

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.262..471q&link_type=abstract

Nature, vol. 262, Aug. 5, 1976, p. 471-473.

Astronomy and Astrophysics

Astronomy

3

Ariel Satellites, Gamma Rays, Radiant Flux Density, Stellar Atmospheres, X Ray Astronomy, Bursts, Gravitational Effects, Neutron Stars, Periodic Variations, Proportional Counters, Scintillation Counters, Stellar Magnetospheres, Thermal Shock, Time Dependence

Scientific paper

Some bursts of hard X-rays witnessed in March 1976 by the Ariel-V scintillation telescope (ST) are discussed. Four bursts corresponding to times when the ST data should be free of all spurious events were selected for special analysis. The timescale (several seconds), correlation with low-energy events observed by a proportional counter on the same satellite, and photon energies upwards of 50 keV suggest connections in origin with other gamma-ray bursts and X-ray bursts reported. The data are analyzed for periodicities. Penetration of a stellar magnetosphere by a large mass of material via some convection process, followed by gravitational fall onto the neutron star atmosphere where the energy is thermalized by a shock, is conjectured. Mechanisms suggested in the literature for similar phenomena are compared. The satellite data are examined for related periodicities.

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