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   61057
   We propose the observation of 152sec pulsar, AX J1820.5-1434 discovered
   with ASCA Galactic Plane survey. On the spectrum analysis of the survey
   data, we can find an absorption structure around 3.5 keV during a low
   intensity phase. But, due to less statistics using only survey data,
   this structure has a low significance and could not determine models.
   Because the source is X-ray pulsar, most possible interpretation is
   cyclotron absorption line. Therefore, we observe it and confirm
   cyclotron abosorption line with the lowest energy.
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