[vsnet-alert 7085] SN 2002an in NGC 2575

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

Dear SN watchers,

  As IAUC 7805 reported, a Japanese amateur Yasuo Sano discovered his
second supernova (first was "hypernova" SN 1997ef) in the nearby
galaxy.  It can reach mag 15.4.  

  SN 2002an was discovered on Jan. 22.52 UT, when its unfiltered red
magnitude was 16.04 (private communication).  It was quickly confirmed
by Reiki Kushida on Jan 22.64 UT, but the announcement delayed until
Jan. 24.94 UT.  The position of this new object is: R.A. = 
8h22m47s.76, Decl. = +24o17'41".7 (2000.0), which is about 38" east
and 7" south of the nucleus of a face-on open spiral (SA(rs)cd) galaxy
NGC 2575.  It locates at the outermost of the disk.

  There are several foreground stars superimposed and around the
galaxy.  A mag 15 star exists 33" due south of the nucleus of NGC
2575.  Also, a mag 15 star at 20" WNW and 67" WNW of the nucleus, the
opposite side than SN.  

  NGC 2575 is somewhat nearby galaxy.  The expected maximum for
typical SN Ia in this galaxy is mag about 15.4, taking account of the
Galactic extinction.  Kushida notes that it become slightly (0.1 mag)
brighter on Jan. 24.729, and nothing was visible on Jan. 6 (limiting
mag 18.5).  If it is of type Ia, it would be some days before maximum
light.  Followup photometry and the earlier spectral classification is
urged. 

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

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