[vsnet-campaign-sn 473] Re: SN2002er recent (cont'd)

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

In [vsnet-campaign-sn 466] (Aug 27);

># The host galaxy of SN 2002er is UGC 10743 (offset is 12"W,5"N), a
># nearby spiral or lenticular (Sa?) galaxy somewhat afftected the
># Milky Way extionction.  The expected maximum for typical SN Ia is
># mag about 14.8.  It seems to be a young SN in a rising phase, so the
># followup observations are quite encouraged.

In [vsnet-campaign-sn 468] (Aug 29):
>  According to IAUC 7961, a spectroscopy of SN 2002er at the INT on
>La Palma revealed that it is of type Ia, about 10 days before maximum
>on Aug. 26.93.  The host-galaxy extinction also exist as well as the
>Milky Way one, so the expected maximum for typical SN Ia is mag about
>15.3.  

In [vsnet-recent-sn 2121]:

>SN2002er recent (cont'd)
>
>  YYYYMMDD(UT)   mag  observer
>  20020816.199  <190C  (KAIT (from IAUC))
>  20020823.199  175:C (KAIT (from IAUC))
>  20020824.199  169:C (KAIT (from IAUC))
>  20020902.907  147CR  (Jean-Beno de Vanssay)
>  20020906.869  139CR  (J. Nicolas)

Although J. Nicolas's report seems to be somewhat overestimated 
(the image can be seen at: 
http://vsnet.astrosurf.com/snweb/2002/02er/images/02erNI_C200209062052.htm
), it seems that estimated extinction would be larger than real value.
If there is no extinction both in the Milky Way and in the host
galaxy, the expected maximum for typical SN Ia is mag about 14.3.  

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

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