[vsnet-chat 1253] SN 1998dt in NGC 945

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

cf. vsnet-chat 1252
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chat/msg01252.html
cf. vsnet-chart 90
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00090.html

Dear SN watchers,

Lick team has discovered another neighbour supernova. IAUC 7006 tells
that the apparent supernova has been discovered in SBc galaxy NGC 945
at Sep. 1.4 UT.  The location is R.A. = 2h28m35s.72, Decl. =
-10o32'59".8 (2000.0), which is about 23" west and 40" south from the
center of the host galaxy.  It is on the southwestern outside arm. 

NGC 945 makes a pair with SBc galaxy NGC 948.  The brighter one on
southwest is the host galaxy.  

The new star was not seen in the image taken on Aug. 23.4, then
appeared as a hint in the prediscovery image taken on Aug 28.4.  On
the discovery image (Sept. 1.4) it was about 17.7 mag (unfiltered
CCD), and on Sept. 2.5 it has rised to about 17.3 mag.  It would be in
the rising phase still now.

The typical SNeIa at this distance is expected to reach 15.8 mag at
its maximam without absorption or so.  Although it would not become so
bright, continuous photometry is encouraged.

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

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