  We present the first observation of planet-induced stellar X-ray activity,
identified for the HD 179949 system, using Chandra / ACIS-S. The HD 179949
system consists of a close-in giant planet orbiting an F9V star. Previous
ground-based observations already showed enhancements in Ca II K in phase with
the planetary orbit. We find an ~30% increase in the X-ray flux over quiescent
levels coincident with the phase of the Ca II enhancements. There is also a
trend for the emission to be hotter at increased fluxes, confirmed by modeling,
showing the enhancement at ~1 keV compared to ~0.4 keV for the background star.
