  CVSO 30 is a young, active, weak-line T Tauri star; it possibly hosts the
only known planetary system with both a transiting hot-Jupiter and a
cold-Jupiter candidate (CVSO 30 b and c). We analyzed archival ROSAT, Chandra,
and XMM-Newton data to study the coronal emission in the system. According to
our modeling, CVSO 30 shows a quiescent X-ray luminosity of about 8e29 erg/s.
The X-ray absorbing column is consistent with interstellar absorption.
XMM-Newton observed a flare, during which a transit of the candidate CVSO 30 b
was expected, but no significant transit-induced variation in the X-ray flux is
detectable. While the hot-Jupiter candidate CVSO 30 b has continuously been
undergoing mass loss powered by the high-energy irradiation, we conclude that
its evaporation lifetime is considerably longer than the estimated stellar age
of 2.6 Myr.
