  We present new Chandra X-ray observations of TAP 26, a ~17 Myr old
magnetically-active weak-lined T Tauri star that has been reported to host a
massive planet in a 10.8 day orbit. At a separation of a = 0.097 AU the planet
will be exposed to intense X-ray and UV radiation from the star. The first
observation caught the star in a state of elevated X-ray emission with
variability on a timescale of a few hours and an X-ray temperature kTx ~ 2 - 4
keV. Two subsequent observations 5-10 days later showed slow variability and a
lower X-ray flux and temperature (kTx ~ 1 keV). We characterize the X-ray
emission and estimate the X-ray ionization and heating rates that will need to
be incorporated into realistic models of the planet's atmosphere.
