Short-term X-ray variability of black hole candidates: Ginga results

Details Short-term X-ray variability of black hole candidates: Ginga results Short-term X-ray variability of black hole candidates: Ginga results

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..69..344n&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 69, Issue 1-3, p. 344-347.

Physics

Nuclear Physics

Scientific paper

The superposition technique is a new analysis method to obtain average properties of certain kinds of aperiodic time variations. Real average profiles of X-ray shots in Cyg X-1, GX 339-4, GS 2023+338 and GS 1124-68 in the hard state are obtained in detail by applying the technique to rapid time variations of these sources observed by Ginga. The shot profiles obtained are consistent with structures of power spectral densities and phase (time) lags below a few Hz. Soft energy spectra of the X-ray shots are thought to be the origin of soft excess components in time-averaged energy spectra. The shot profiles imply that the X-ray shots arise from aperiodic mass accretion in the advection dominated disk. These results are briefly described.

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