Stellar activity can produce large amounts of high-energy radiation , which is absorbed by the planetary atmosphere leading to irradiation-driven mass-loss .
We present the detection and an investigation of high-energy emission in a transiting super-Earth host system , GJ 1214 , based on an XMM-Newton observation .
We derive an X-ray luminosity L _ { X } =7.4 \times 10 ^ { 25 } erg s ^ { -1 } and a corresponding activity level of \log ( \frac { L _ { X } } { L _ { bol } } ) \sim -5.3 .
Further , we determine a coronal temperature of about \sim 3.5 MK , which is typical for coronal emission of moderately active low-mass stars .
We estimate that GJ 1214 b evaporates at a rate of 1.3 \times 10 ^ { 10 } g s ^ { -1 } and has lost a total of \approx 2-5.6 M _ { \oplus } .