Fig. 2
Application of the GL method for a blind periodicity search to the complete data set obtained by RXTE PCA of giant flare of SGR 1806−20 2004 Dec. 27 revealed a strong coherent signal at the frequency of 0.13219244 Hz and higher harmonics up to 100 Hz. Bayesian posterior probability density vs. frequencies in the range of 12.0–160 Hz is shown. The inset panel shows a zoomed part of it around 16.88 Hz. Arrows indicate higher harmonics (from 125 to 132) of the fundamental frequency and the dash-dotted vertical line shows one of the detected QPO frequency in a short time interval (see text, for details).
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