The puzzling activity cycle of the planet host star iota Hor

The discovery of a coronal cycle in iota Hor represents the shortest observed todate, in good agreement with chromospheric observations. A longer term trendseems to modulate the outcome of the 1.6 yr cycle. The most recent data couldindicate that the minimum of a long term cycle has been reached and the activitycould be increasing in the next years. This might offer us the uniquepossibility to observe for the first time a double coronal cycle similar tothose observed in the chromosphere of other stars. The iota Hor cycle might bethe paradigm of the first activity cycles in the life of a solarlike star;besides, a jovian planet orbits the star at 0.9 a.u. We intend to extend thecoverage of the new coronal cycle, and to monitor the interplay with a possible longer term cycle. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]