Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sval....5..340g&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Dec. 1979, p. 636-640.) Soviet Astronomy Letters, vol. 5, Nov.-Dec. 1979, p. 340-342
Astronomy and Astrophysics
Astronomy
25
Flare Stars, Gamma Ray Astronomy, Neutron Stars, Pulsars, X Ray Sources, Bursts, Energy Spectra, Luminous Intensity, Radiant Flux Density, Stellar Mass Accretion, Venera Satellites, X Ray Spectra
Scientific paper
Recurrent gamma-ray bursts from the source FXP 0520-66 registered by the Venera probes on March 6 and April 4 and 24, 1979 are examined. Time profiles and energy spectra of the three recurrent bursts are given together with such parameters as commencement time, burst intensity, mean energy flux density, total energy, and luminosity. It is suggested that the weaker recurrent bursts could be induced by accretion of lower intensity taking place against the background of damped perturbations generated by some strong initial process. A second possibility is that recurrent bursts, 300-1000 times weaker and having a softer spectrum, may be associated with thermally unstable thermonuclear burning of material falling onto the surface of a neutron star.
Golenetskij S. V.
Gur'yan Yu. A.
Ilinskij V. N.
Mazets E. P.
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