[vsnet-alert 6933] Re: SN 2001ig in NGC 7424

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear SN watchers,

I wrote in [vsnet-campaign-sn 295]:

>  The spectrum taken at Las Campanas Observatory shows it is in the
>very early phase; it shows very blue continuum with very broad and
>largely blueshifted absorption features.  The CfA team reports the
>provisional classification as type II/IIb, but further spectroscopy
>is needed to confirm.

  IAUC 7777 informed that the radio emission from this SN was
detected.  Type II/IIb SNe are sometimes a strong radio emitter,
because of the interaction of the SN shock with the circumstellar
matter which had outflowed from the progenitor during the supergiant
phase. 

  The recent magnitude estimates indicate that SN 2001ig is
continuously rising; it reached mag 13.0 on Dec. 19.5 UT.  See
[vsnet-alert 6931].

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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