PSR B1929+10 - the most serious challenge for electron acceleration in a PWN

XMMNewton has confirmed the existence of the diffuse Xray emission with atrail morphology lying in a direction opposite to the transverse motion of themillion year old pulsar PSR B1929+10. A possible interpretation of the emissionis that it is a synchrotron wake from particles left behind by the pulsar as itmoves through the ISM. We propose deep spectroimaging observations of thepulsar.s Xray trail with XMMNewton in order to explore the emission processesat work and to measure its length/width and spectral evolution as a function ofdistance from the pulsar. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]