Table 5: Times of minima for BFCen. O-C values are calculated from the ephemeris given in Eq. (2) adopting a circular orbit. References are: O28 = Oosterhoff (1928), O30 = Oosterhoff (1930), WR94 = Wolf & Ratzlaff (1994), OZ04 = Ogloza & Zakrzewski (2004).

HJD - 2400000		 rms Type O-C Ref.

19878.270		 0.01 P -0.009 O30
23974.257 0.01 P +0.072 O28
23985.231 0.01 P -0.034 O28
24262.292 0.01 P +0.027 O28
24288.200 0.01 P +0.082 O28
25381.313 0.01 P -0.032 O30
25418.272 0.01 P -0.006 O30
45055.7275 0.0003 P +0.0002 This study
45064.953 0.008 S -0.008 WR94
45087.100 0.009 S -0.020 WR94
45380.7405 0.0001 P -0.0001 This study
47628.128 0.005 S -0.005 WR94
47665.064 0.002 S -0.003 WR94
50556.9475 0.0031 S +0.0012 OZ04
50558.7950 0.0014 P +0.0021 OZ04
51238.3685 0.0010 P +0.0024 OZ04
51236.5238 0.0011 S +0.0044 OZ04
51531.9907 0.0065 S +0.0047 OZ04
51533.8332 0.0011 P +0.0005 OZ04

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