[vsnet-alert 6927] SN 2001ig in NGC 7424

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

Dear SN watchers,

  R. Evans discovered a bright SN in the southern hemisphere (11.5
degrees south of Fomalhaut).  It is quite young SN.

  He discovered it visually on Dec. 10.43, and confirmed by C.
Bembrick with CCD on Dec. 10.55.  The position of SN 2001ig is: R.A. =
22h57m30s.69, Decl. = -41o02'25".9 (2000.0), which is about 139" east
and 109" north of the big face-on open-spiral (SAB(rs)cd) galaxy NGC
7424.  It locates on the end of the eastern spiral arm.  

  Because of the the neighbourhood (and apparent size) of the galaxy,
many, many star clusters or H II regions in NGC 7424 (or foreground
stars) can be seen on DSS 2 image.  But the mag 14.2 object (V mag of
SN, on Dec. 13.0) would be clearly identified.

  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.  Note that the representative SN IIb 1993J in M 81
shows the "double peak" light curve.  The intense followup photometry
is defenitely urged.  Below is the reported magnitudes up to now.

SN2001ig  20011210.43  145:   Evans
SN2001ig  20011210.55  151C   Bembrick
SN2001ig  20011211.5   14.85C Bembrick
SN2001ig  20011212.1   14.26V CTIO
SN2001ig  20011212.1   14.21B CTIO
SN2001ig  20011213.0   14.24V CTIO

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

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