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   51015
   The nature of unidentified Galactic gamma-ray sources remains a central
   puzzle in high energy astrophysics. One important source class is
   Geminga-like rotation powered pulsars not visible in the radio. We
   propose here exposures of two EGRET error boxes highly likely to host
   such pulsars -- we have improved the source localization and found soft
   X-ray counterparts for these fields. ASCA's spectral sensitivity and
   modest spatial resolution provides the key observations that can select
   any pulsar source responsible for the GeV photon emission. We also will
   search for plerionic emission in these fields. These data will greatly
   advance the quest to identify another object like Geminga and
   characterize the galactic plane sources as a class.
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