Quasi-periodic oscillations in short type II bursts from the Rapid Burster

Details Quasi-periodic oscillations in short type II bursts from the Rapid Burster Quasi-periodic oscillations in short type II bursts from the Rapid Burster

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..300l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 15, 1991, p. 300-309.

Astronomy and Astrophysics

Astronomy

15

Stellar Oscillations, Stellar Radiation, Type 2 Bursts, X Ray Binaries, Exosat Satellite, Power Spectra, Stellar Luminosity

Scientific paper

In July 1984 and Sept. 1985, 784 type II bursts from the Rapid Burster were detected with Exosat, ranging in duration from under 2 s to 27 s. Quasi-periodic oscillations (QPOs with frequencies of 5-7 Hz were observed but only in bursts with durations of 9-19 s. It is concluded that QPOs have been detected in type II bursts of all durations in excess of 9 s. It is also found that the occurrence of QPOs does not depend on the burst peak flux; when QPOs are observed, they do not necessarily occur in all bursts; and the centroid frequency of the QPOs is dependent on the burst peak flux.

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