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   PR # 11004
    According to the standard scenario,the millisecond pulsars are formed
    in accreting X-ray binaries, and the globular clusters are supposed
    to offer the best birthplace for them.  To verify the scenario,
    knowledge of population and lifetime of both pulsars and accreting
    binaries are essential.  We propose an ASCA observation of M28, a
    medium density globular cluster which contains a millisecond pulsar
    1821-249. We investigate the problem in three aspects:(1) measurement
    the X-ray pulsation from PSR1821-249, which has by far the largest
    spin-down luminosity among the recycled pulsars (emission mechanism)
    (2) search for the unknown pulsars in the cluster (population of
    pulsars),(3) measurement of the steady X-ray emission (population of
   low-luminosity  X-ray binaries
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