A Search for X-ray Emission from the 7000-Year-Old Pulsar J1357-6429

PSR J13576429 is a very young (7 kyr) and nearby (virgul2.5 kpc) energetic radiopulsar apparently associated with the supernova remnant candidate G309.82.6.The only existing Xray observations of this system were obtained in the ROSATAllSky Survey that apparently show a bright extended source positionallycoincident with the pulsar and with a candidate supernova remnant detected atradio wavelengths. We here propose a short XMM observation in order to establishthe basic properties of this system. If, as expected, this is a bright Xraysource, the requested 10 ksec observation should begin to reveal spectroscopicand morphological details of the pulsar wind nebula/pulsar and form the basisfor future more detailed studies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]