[vsnet-alert 7122] Re: SN 2002ap spectrum

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

Dear SN watchers,

I wrote in [vsnet-alert 7120]:
>  K. Kinugasa, H. Kawakita, Gunma Astronomical Observatory (GAO); K.
>Ayani, T. Kawabata, Bisei Astronomical Observatory (BAO); and H.
>Yamaoka, Kyushu University, write: "Low-resolution spectra of SN
>2002ap (IAUC 7810) are obtained on Jan 31.4 UT with GAO 0.65-m
>telescope (with GCS, range 380-750 nm) and on Jan 31.5 UT with BAO
>1.01-m telescope (range 470-700 nm).  Preliminary reduction reveals
>rather blue continuum with a steep decreace over 650-700 nm, and
>without any deep absorption or emission.  Very broad (FWZI ~ 30 - 50
>nm) and shallow depressions exist around 570 nm (deepest), 470 nm, and
>620 nm.  Overall feature resembles to that of a peculiar Ib/c SN (or 
>"hypernova") 1997ef, but SN 2002ap is much bluer.  The follow-up 
>observation in all wavelength is strongly recommended for this unusual
>and nearby exploding object.  The spectra can be seen at:
>http://vsnet.astron.pref.gunma.jp/images/gcs/SN2002ap.gif and
>http://vsnet.town.bisei.okayama.jp/bao/astro/sn/sn2002ap.gif .

This information was announced on IAUC 7811, as well as other two
spectrum (ESO and Wise Obs.), both of which reached the same
conclution, i.e., SN 2002ap is a HYPERNOVA !

The intensive followup observation of this unique and very nearby
hypernova is strongly encouraged.

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

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