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Fig. A.1

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IT Nor, an Algol type eclipsing binary. When not indicated otherwise, we show in the different charts the OMC light curve folded with the period estimated in this work (bottom left), and the OMC light curve folded with the period given by the VSX catalogue (bottom right panel). In this case the period derived from the OMC light curve improves significantly the value provided by the VSX and yields a satisfactory folding.

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