A search for a spinning white dwarf companion in the gCas-analog HD 161103

We ask for a new observation of the gamma Cassiopeiaelike Xray star HD 161103to check for the presence of the 3.2 ks modulation seen in the previousXMMNewton observation (in 2004). If the modulation is observed once again withthe same period, it would support the origin of the mysterious Xray emission ofthe whole class of gamma Caslike stars as being due to an accreting compactobject, presumably a white dwarf.