[vsnet-alert 3842] Spectroscopy of SN 1999gn

[AYANI Kazuya <ayani@bao.go.jp>]

Spectroscopy of SN 1999gn

Dear colleague,

We have posted the following report to CBAT

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SUPERNOVA 1999gn IN NGC 4303 = Messier 61    
     K. Ayani, Bisei Astronomical Observatory (BAO), and H. Yamaoka,
Kyushu University, report that a wide-band spectrum (range 400-800 nm,
resolution 0.6 nm) of SN 1999gn, obtained with the BAO 1.01-m
reflector on Dec. 20.8 UT, shows it to be a type-II supernova in an
early phase.  It exhibits a blue continuum with a broad P-Cyg H-alpha
profile and H-beta absorption.  The expansion velocity of the
supernova, derived from H-alpha absorption minimum with respect to the
narrow H-alpha emission (from superposed H II region), is 5 300 km/s.
-------------------------------------

Best regards,

Kazuya Ayani
Bisei Astronomical Observatory

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