[vsnet-campaign-sn 486] type of SNe

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

Dear SN watchers,

  IAUC 7999 informed the spectral types for two recent SNe, observed
with Las Campanas Baade 6.5-m telescope. 

SN 2002gy:

In [vsnet-obs 41955] (Oct. 20):
>SN2002gy  20021009.4  <190C  KAI
>SN2002gy  20021016.4   176C  KAI
>
># UGC 2701, a host galaxy of SN 2002gy (3:22:36.45, +9:28:22.0,
># J2000.0, 3"E, 3"S of the nucleus), is an edge-on spiral (Sc) galaxy,
># affected by the Galactic extinction.  The expected maximum for
># typical SN Ia is mag around 17.5. 

  Its spectrum taken on Oct. 25.21 resembles that of type Ib/c SN.  It
is heavily reddened also by the interstellar matter within the host
galaxy.

SN 2002ha: 

In [vsnet-campaign-sn 484] (Oct. 23):
>SN2002ha  20021019.2  <190C  KAI
>SN2002ha  20021021.2   173C  KAI
>SN2002ha  20021022.2   167C  KAI
>
># The host galaxy of SN 2002ha (20:47:18.58, +0:18:45.6, J2000.0,
># offset from nucleus = 7"W, 29"S) is NGC 6962, a spiral (SAB(r)ab)
># galaxy making a pair with NGC 6964 and making a group with several
># other galaxies.  The expected maximum for typical SN Ia is mag about
># 15.5.

  A spectrum taken on Oct 25.03 shows that it is type Ia SN about 3
days before maximum with interstellar extinction in the host galaxy.
Note that this SN was not detected 6 days before spectroscopy, which
is unusual for typical SN Ia. 

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

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp