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Fig. A.1

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SDSS postage stamp images (1 arcmin square) and Hi-line profiles of the detections included in this second data release, ordered by increasing GASS number (indicated in each spectrum). The Hi spectra are calibrated, smoothed and baseline-subtracted. A dotted line and two dashes indicate the heliocentric velocity corresponding to the SDSS redshift and the two peaks used for width measurement, respectively.

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