We present new XMM - Newton X-ray observations of the z = 1.246 
narrow-line radioquasar RX J1011.2+5545 serendipitously discovered by ROSAT .
The flat X-ray spectrum previously measured by ROSAT and ASCA is shown to be the result of a steep \Gamma \sim 1.8 power law spectrum seen through a moderate intrinsic absorbing column ( N _ { H } \sim 4 \times 10 ^ { 21 } { cm } ^ { -2 } ) .
The position of the X-ray source is entirely coincident with the nucleus of the radio source that we have resolved in new sensitive VLA observations at 3.6 and 6 cm , implying that scattering in the radio lobes is not responsible for the bulk of X-ray emission .
In the EPIC pn image , a faint patch of X-ray emission is apparent 14 ” to the NE of the main X-ray source .
The former is positionally coincident with an apparently extended optical object with R \sim 21.9 , but there is no associated radio emission , thus ruling out the possibility that this represents a hotspot in a jet emanating from the primary X-ray source .
No reflection features are detected in the X-ray spectrum of the narrow-line radioquasar , although an Fe line with equivalent width of up to 600 eV can not be ruled out .