[vsnet-campaign-sn 407] SN Ia 2002cd and other SNe classifications

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

Dear SN watchers,

SN 2002cd:

In [vsnet-campaign-sn 405]:
># NGC 6916 = the host galaxy of SN 2002cd is somewhat nearby galaxy
># (v_r = 3101 km/s from NED), but affected notable Galactic reddening.
># The expected maximum for typical SN Ia is mag about 16.0 in R.

According to IAUC 7873,  The CfA team took a spectrum of SN 2002cd,
which revealed that it is a type Ia SN about 10 days before maximum.  
In addition to a Galactic extinction (A_R = 1.1 mag), the more dust
extiction in the host galaxy is mentioned.  Then, the expected maximum
is not so bright as 16.0R, which was derived with the neglection of the
reddening in the host galaxy.

Other SNe spectra can be seen at the CfA website:
http://cfa-www.harvard.edu/cfa/oir/Research/supernova/RecentSN.html ,
where some other SNe types are reported.

SN 2002bz:

In [vsnet-campaign-sn 400]:
># This is distant SN which expected maximum of typical SN Ia is mag
># about 17.0.

It is of type Ia near maximum on Apr. 5. 

SN 2002ca:

In [vsnet-campaign-sn 400]:
># The host galaxy of SN 2002ca is UGC 8521.  The expected maximum for
># typical SN Ia is mag about 15.0, but the reported magnitude does not
># changed for one day, which suggest that it would not be of type Ia
># in the early rising phase.

It is normal type II SN in the early phase on Apr. 5.  

SN 2002cb:

In [vsnet-campaign-sn 404]:
># The spectrum of SN 2002cb taken by the UCB team revealed that it is
># of type IIn.  The expected maximum for typical SN Ia is similar to
># the discovery magnitude, so it belongs the bright class of SN IIn.

A spectrum of this SN IIn can be seen on the CfA website.

SN 2002cc:

In [vsnet-campaign-sn 405]:
># The host galaxy of SN 2002cc is an anonymous galaxy near (about 2'
># NW of) UGC 4470.  It seems to belong the group WBL 184, but the
># distance is uncertain.

It is type Ia SN about a week after maximum on Apr. 10.  The recession
velocity of the host galaxy is estimated as about 20000 km/s.  It is a
distant SN.

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

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