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SN in M51



Dear Taichi,

We estimated rough magnitude of SN in M51 in the V-band 
using "imexamine" of IRAF.
The local standard star is "135" star of "The SUPERNOVA 
SEARCH CHARTS". The V magnitude of SN at 15:21 UT is 14.0.

Cheers,

M. Okyudo & T. Ono