Table 3: Barycentric timings of the spin maxima (spin phase zero), the eclipse center, and the zero crossing of the absorption lines from the secondary star (orbital phase zero). The O-C values are given relative to the ephemerides of Hellier & Sproats (1992) (see text).

Band	HJD+2400000	Error	O-C
	(d)	(d)	(d)
(a) Spin maxima
Blue light	53027.7670	0.0014	0.0113
	53027.8109	0.0014	0.0087
	53030.8381	0.0014	0.0104
H flux	53027.7640	0.0014	0.0083
	53027.8109	0.0014	0.0087
	53030.8360	0.0014	0.0083
(b) Eclipse timing
Blue light, H flux	53030.7909	0.0014	-0.0004
(c) Absorption line zero crossing
NaI doublet	53030.7893	0.0001	-0.0012