All Figures

	Figure 1: The left panel shows the light curves in B, V, and R bands for PKS 0736+017, as listed in Table 1. The right panel shows the reference stars included in our field: down triangles for star 9, squares for star 10, and up triangles for star 11. The December 2001 points are a mean value. corresponds to December 11, 1998.
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In the text

	Figure 2: (a)-c)). a) Light curves for the March 2000 season, and  b) for November 2000. Magnitudes for December 2001 shown in  c) are instrumental.
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In the text

	Figure 3: The shape of the optical broad band of PKS 0736+017 can be fitted by a power law.
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In the text

	Figure 4: a) Data for March 2000 shows a tendency in the sense that PKS 0736+017 is redder when it is brighter. b) This tendency was confirmed with data obtained in November 2000, which shows a clear correlation between colour and brightness.
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In the text

Figure 5: Relation between the spectral index  and the brightness in R. We have included our own data and the average maximum reported by Clements et al. (2003) for January 2002. Our analysis of the data reported by Clements et al., in their article online version, suggests two varying modes. This tendency is represented by the dashed and dotted lines. Our data agrees with these tendency. At low flux level, small changes in flux correspond to large changes in the spectral slope, while much less pronounced spectral changes correspond to high brightness state. In both cases, the object reddens when it brightens.

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In the text