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Fig. 1

image

SDSS spectra of six of the CVs for which we provide the first precise orbital period measurement (CSS J1126 and CSS J1325 have not been observed spectroscopically by the SDSS). The flux levels have been smoothed with 10-pixel Savitsky-Golay filters for display purposes. The units of the abscissae are 10-21 W m-2 nm-1, which corresponds to 10-17 erg s-1 cm-2 Å-1.

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