Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..632w&link_type=abstract
Astrophysical Journal, Part 1, vol. 247, July 15, 1981, p. 632-638.
Astronomy and Astrophysics
Astronomy
18
Binary Stars, Flare Stars, Gamma Ray Astronomy, Heao 1, Neutron Stars, Fast Fourier Transformations, Light Curve, Sky Surveys (Astronomy), Stellar Evolution, Stellar Luminosity, Stellar Models
Scientific paper
A burst profile of high statistical precision is presented for the gamma-ray burst of October 29, 1977, detected by the HEAO 1 Large Area Sky Survey Experiment. Data from all modules active at the time are summed together in the profile. Several local maxima, separated by intervals of about 4s, are plainly visible, and local minima fall approximately halfway between adjacent maxima. Two methods are used to analyze the profile: (1) by fitting a function that includes a damped sinusoid directly to the total profile, and (2) by fitting again without any periodic component, subtracting this fit from the data, and examining the power spectrum of the residuals. The limitations of fitting periods to bursts of short duration are described, and implications of period detections for neutron star models of gamma bursts are developed. It is shown that gamma bursters could be neutron stars in binary systems.
Byram Edward T.
Chubb Talbot. A.
Friedman Harvey
Meekins John F.
Share Gerald H.
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