Fig. 2
Example of the matched filtering process used by Saintonge (2007) for ALFALFA. Top: matched filtering template used. The template is modeled after the widest profile shown in Fig. 2 of Saintonge (2007). Bottom: simulated spectrum with a low frequency ripple with a wavelength of 500 channels. The result of the cross-correlation with the template shown above is shown as the red line.
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