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   51010
   Although the globular cluster rotation-powered pulsars are believed to
   be the descendants of LMXBs, the number of bright LMXB in the globular
   clusters is smaller than what is expected from the number of the
   pulsars by an order of magnitude. ROSAT observations suggest the dim
   cluster sources are probably LMXBs in low-state, and contribute to the
   formation of the pulsars. In AO-4, we observed 5 dense globular
   clusters and found new dim sources from all of them, which implies
   potential existence of dim sources in most globular clusters. We
   propose to obseverve another 5 globular clusters for 20ksec for each in
   order to estimate the total number of dim sources over the galactic
   globular clusters.
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