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   PR # 41130
   We propose to observe the BL Lac object Mkn501. This object is the
   second TeV gamma ray emitter recently detected by Whipple Telescope
   after Mkn421. Our multiband observations of Mkn421 in AO2 and AO4
   have shown the simultaneous xray and TeV flare. It is hard to explain
   both X and GeV/TeV emission by the standard model(SSC). In order to
   understand the emission from ``TeV'' blazar, xray observation is
   crucial. Because of the high time variability, we propose to
   coordinated multiband observation from radio to EGRET(GeV) and
   Whipple telescope(TeV).
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