[vsnet-alert 3282] SNe 1999dg and 1999dh

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

cf. [vsnet-chart 185] Chart of SN1999dg
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00185.html
cf. [vsnet-chart 186] Chart of SN1999dh
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00186.html
cf. [vsnet-chat 2173] Host galaxy of SN1999dg
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chat/msg02173.html
cf. [vsnet-chat 2174] Host galaxy of SN1999dh
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chat/msg02174.html
cf. [vsnet-obs 21904] SN1999dg,SN1999dh early photometry from IAUC
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/obs21000/msg00904.html

Dear SN watchers,

  IAUC 7229 noticed that the LOSS KAIT team has discovered new two
supernovae.  The magnitudes at discoveries are around 15 -- 16, which
are easily catched by CCD camera.

  First, SN 1999dg is discovered and confirmed on July 23.2 (CCD mag
was about 16.7) and 24.2 (CCD mag about 16.5), respectingly, and was
not seen on July 15.2 (limiting mag was about 19.0).  It seems that
this SN is in the rising phase.  The location is: R.A. = 15h11m28s.41,
Decl. = +13o29'05".7 (2000.0), which is about 5" east and 5" north
from the core of the host lenticular galaxy UGC 9758.  It is well
inside of the central region of the host.  There are some confusing
field stars around the galaxy, which are rather far from the nucleus. 

  The morphology of the host galaxy indicates that this SN is likely
of type Ia.  The recession velocity of UGC 9758 is 6630 km/s (CfA
catalog), from which the expected maximum would be the first half of 
16th magnitude.  

  Second, SN 1999dh is discovered on July 23.5 (CCD mag about 15.4)
and confirmed on July 24.5 (mag 15.6).  The location of this new star
is: R.A. = 2h11m06s.07, Decl. = +3 51'06".9 (2000.0), which is about
29" west and 2" south from the core of the host Sc galaxy IC 211.
This location is on the western arm, and there are some confusing
foreground stars or the condensation on DSS2 image.  

  In the neighbour of IC 211, there is an S0 galaxy NGC 851 (about 2'
east and 5' south from IC 211).  These two seem to be making the
group of galaxies.

  The recession velocity of IC 211 is about 3000 km/s, from which the
expected maxima of typical SNIa would be around 15 mag.  

  Followup magnitude estimates and confirmational spectroscopies of these
two SNe are encouraged. 

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

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