Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240l..27h&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 240, Aug. 15, 1980, p. L27-L31. Research supported by Zonta Internat
Astronomy and Astrophysics
Astronomy
56
Compton Effect, Light Curve, Satellite Observation, X Ray Sources, Astronomical Models, Black Body Radiation, Bursts, Galactic Nuclei, Sas-3, Spaceborne Astronomy, X Ray Astronomy
Scientific paper
A distinct, identifiable, multiple-peaked structure has been observed in Type I X-ray bursts from three sources. At energies below 6 keV, the light curves look like typical Type I bursts. At higher energies, the burst is double-peaked, with both the depth of the dip and the separation between the peaks increasing with energy. A light curve of the energy-integrated intensity shows no distinct double peak, suggesting that only a single energy release occurs. Blackbody fits to the evolving burst spectra yield changing radii and temperatures, inversely correlated, during the early part of the burst. The physical interpretation of these changes is uncertain. Burst decay spectra yield relatively constant radii with decreasing temperatures. It is proposed that Compton scattering may be responsible for the dips in the higher-energy light curves by shifting photons to lower energies.
Cominsky Lynn
Hoffman Anthony J.
Lewin Walter H. G.
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