Fig. 2
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Fourier coefficient R21 as a function of period of pulsation. RR Lyrae candidates are plotted with black open circles. Filled black circles correspond to stars classified as RRc. For a reference, we plotted RRab and RRc stars observed by the OGLE project toward the Galactic bulge with light blue and orange points (Soszyński et al. 2014).
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