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   PR # 11055
    The association of neutron stars with supernova remnants is a corner-
    stone of stellar astrophysics. From this viewpoint,it is important to
    obtain a complete census of pulsar powered SNRs. Each new association
    has shed light on the formation of neutron stars,initial spin periods
    and magnetic field strengths.  X-ray observations can be used to
    confirm models of plerion or pulsar powered synchrotron nebulae.ASCA
    with its contiguous observation of a given source is particularly
    well suited to pulsar searches. With the goal of pulsar detection and
    the study of plerion evolution in mind, we propose ASCA observations
    of three plerionic SNRs: G11.2-0.3,a plerion associated with SNe 386;
    G54.1+0.3, a distant filled center SNR and G322.5-0.1, a newly
   discovered combination remnant
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