************************************************************************* 72055 We request 50 ks of ASCA time to make X-ray observations of the field containing the newly discovered radio pulsar PSR J1118-61. This pulsar, found as part of the ongoing Parkes Multibeam Galactic plane search for radio pulsars, is remarkable as it has characteristic age only 1500 yr, a fourth addition to the three pulsars having characteristic ages under 2000 yr (Crab, PSRs B1509-58 and B0540-69). ASCA observations, in concert with the Australia Telescope Compact Array radio imaging observations we have been awarded, will search for a parent supernova remnant shell, plerionic emission, pulsed magnetospheric emission, and possibly thermal emission from this young, cooling neutron star. *************************************************************************