Spectral evolution of a long X-ray burst

Details Spectral evolution of a long X-ray burst Spectral evolution of a long X-ray burst

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...212l..73s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 212, Mar. 1, 1977, p. L73-L76.

Astronomy and Astrophysics

Astronomy

120

Black Body Radiation, X Ray Astronomy, X Ray Spectroscopy, Black Holes (Astronomy), Bremsstrahlung, Bursts, Light Curve, Neutron Stars, Spaceborne Astronomy, Spectrum Analysis, X Ray Sources

Scientific paper

Results are reported for spectroscopic observations of an X-ray burstlike event that had a duration of 100 sec and a peak count range 1.5 times that of the Crab Nebula. The best position determined is 356.4 deg galactic longitude, 2.3 deg galactic latitude. It is shown that the spectrum of the source changed as the event evolved, being very soft during the 20-sec peak of the burst, quickly hardening during the decay, and again softening as the decay proceeded. The spectra are fit best by a blackbody model with kT of 0.87 to 2.33 keV, and it is noted that a weak flux was detected some time after the burst and was well fitted by a 10-keV thermal bremsstrahlung spectrum with an indication of iron line emission. A source size is obtained which suggests a neutron star or a black hole of stellar mass.

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