Electronic Telegram No. 870

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html

SUPERNOVA 2007ai IN MCG -04-38-4

Further to IAUC 8813, W. Li reports the LOSS/KAIT discovery of an
apparent supernova (mag 18.0) on an unfiltered KAIT image taken on Mar.
6.53 UT.  The new object is located at R.A. = 16h12m53s.74, Decl. =
-21o37'48".7 (equinox 2000.0), which is 5".1 east and 24".5 south of
the center of MCG -04-38-4.  Nothing was visible at this location on a
KAIT image from 2006 Aug. 29.18 (limiting mag 19.0).  G. Folatelli, on
behalf of the Carnegie Supernova Project, confirmed 2007ai at magnitude
J = 17.3 on Y- and J-band images taken with the 1-m Swope telescope (+
RetroCam) at Las Campanas Observatory on Mar. 8.40, with measured
position end figures 53s.75, 48".5.

Host galaxy info: vel = 9492 km/s, 1.7 x 1.6, 15, Sc

SN type info: Ia

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