[vsnet-alert 2812] SNe 1999bg and 1999bh

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

Dear SN watchers,

  Lick Observatory Supernova Search (LOSS) team has discovered two new
supernovae with KAIT, both of which can become bright.  Among them,
the host of SN 1999bg would be nearby one as Virgo cluster.
Remarkable!  

  According to IAUC 7135, SN 1999bg was discovered on Mar. 28.3 at
15.5 mag.  The location is R.A. = 12h04m07s.30, Decl. = +62o30'01".2
(2000.0), which is about 33" west and 20" south of the nucleus of SBcd
galaxy IC 758.  On Digitized Sky Survey 2 image, the spiral arm of
this galaxy seems somewhat dim, and at the position of the new star
there exists a diffuse condensation which would be an H II region or a
accompanied galaxy.  

  The recession velocity of IC 758 is about 1200 km s-1, which is the
same order of that of Virgo cluster.  Though the local dispersion from
Hubble flow would disorder the distance estimate, this can be very
nearby galaxy, say, 20 Mpc order.  Typical SNeIa on 20 Mpc would be 13
mag or brighter at its maximum.

  Another one, SN 1999bh, was discovered on Mar. 29.2 at 16.8 mag in
the Sb galaxy NGC 3435.  The location is R.A. = 10h54m46s.97, Decl. =
+61o17'20".0 (2000.0), which is about 10" west and 3" south from the
core of the host.  The position coincidents to the edge of the bright
bulge.  Note that there is a foreground star (U1500_05414356, USNO_R =
16.6 mag) at about 32" east and 12" south from the nucleus.  Typical
SNeIa on this distance would become 16 mag or so at their maximum.  

  The former can become the brightest one after SN 1998bu.  Followup
magnitude estimate and spectroscopy (the types has not determined for
eigher) are extremely encouraged.

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

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