[vsnet-alert 6314] SN 2001dn in NGC 662

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

Dear SN watchers,

  Yesterday's IAUCs reported three discoveries of bright supernovae.
I will make comments indivisually.

  For the first, SN 2001dn was discovered by the U.K. amateur Tom
Boles on Aug. 14.069 UT at mag 15.5C.  The reported position is R.A. =
1h44m35s.32, Decl. = +37o41'49".7 (2000.0), and the offset from the
nucleus of NGC 662 is reported as 4" west and 3" north.  These two
seems to be inconsistent (the difference is about 3").  Consulting the
discovery image (http://vsnet.supernovae.net/sn2001/n662s1.gif, note
that north is down and east is right), the offset seems to be more
precise.  

  NGC 662 is classified as a peculiar spiral (S pec).  It has some
blobs, and bright northwestern component (interacting pair?).  The SN
lies between the brightest nucleus and this northwestern component.

  NGC 662 is a member of the Picsis-Perseus supercluster, which is
about 5 times further than the Virgo cluster.  Then, the expected
maximum of the typical SN Ia is around mag 15.7.  Further photometry
and type determination is encouraged.

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

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