Table 2: Times of extrema in the light curve of QW Ser in February 2003.

Maxima			Minima
E	HJD	O-C	E	HJD	O-C
0	694.617	0.021	0	694.580	-0.037
12	695.536	0.003	1	694.661	0.011
13	695.612	-0.019	12	695.513	0.039
14	695.685	-0.062	13	695.593	0.074
26	696.610	-0.008	14	695.663	-0.020
39	697.613	0.062	26	696.589	-0.034
			27	696665	-0.051
			39	697.598	0.019
			40	697.671	-0.030