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Fig. 1.


Vertical scale in the upper line of figures on the dynamic spectrum shows the frequencies used in 32-channel observations. The horizontal scale of the lower line of drawings shows the recording time. The upper part of the figure shows the dynamic spectrum, and the lower part of the figure shows the pulse profile with height in arbitrary units (a.u.). The blue color shows the pulse obtained by adding up the channels represented in the dynamic spectra after taking the dispersion measure into consideration, and the red color shows the signal added up with the zero dispersion measure. The detected pulse has S/N = 18.3.

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