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Fig. 3

image

Phase diagrams of the uvby photometric measurements of HD 18078 for the rotation period Prot = 1358 d derived from analysis of the magnetic variations and phase origin HJD0 = 2 449 930.0. Different symbols are used to distinguish the observing seasons: open circles: 1995–96; filled squares: 1997–98; filled triangles: 1998–99; open squares: 2001–02; full dots: 2003–04.

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