Electronic Telegram No. 1753
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://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVAE 2009cc-2009cf
     D. Sand, Harvard-Smithsonian Center for Astrophysics and Las Cumbres
Observatory Global Telescope Network; M. L. Graham and C. Bildfell, University
of Victoria; D. W. Just, S. Herbert-Fort, and S. Sivanandam, Steward
Observatory; C. J. Pritchet and H. Hoekstra, Leiden University; and D.
Zaritsky, Steward Observatory, report that four more supernovae (cf. CBET
1727) were discovered on g'- and r'-band images obtained at the Canada-
France-Hawaii Telescope (+ Megacam).  Auxiliary imaging/photometry was
obtained with the Steward Observatory 2.3-m reflector (+ 90Prime imager).
All spectroscopy was obtained with Hectospec on the MMT at Mount Hopkins
(during "queue observations").  The publicly available Supernova
Identification code of Blondin and Tonry (2007, Ap.J. 666, 1024) was
utilized for determining spectroscopic types.

SN       2009 UT     R.A. (2000.0) Decl.       g'     r'    Offset
2009cc   Feb. 27    9 23 59.36  +14 09 51.3   20.6   20.3   0".43 E, 1".20 N
2009cd   Feb. 28   10 23 18.59  +49 05 16.5   21.3   21.4   0".1 E, 1".33 S
2009ce   Mar.  2   14 31 01.13  +25 46 57.9   19.8   19.4   0".83 E, 0".14 N
2009cf   Mar.  2   14 53 37.34  +18 21 08.3   20.7   20.1   0".12 W, 0".76 S

A spectrum of 2009cc obtained on Mar. 16 UT shows it to be a normal type-Ia
supernova (at z = 0.138), roughly 30 days after maximum; additional magnitudes
for 2009cc:  Jan. 26, g' = 22.8 +/- 0.3, r' = 21.8 +/- 0.3; Feb. 21, g' =
19.4 +/- 0.1, r' = 19.1 +/- 0.1.  The apparent host galaxy of 2009cc has
magnitudes g' = 18.79 +/- 0.03 and r' = 17.84 +/- 0.01.  A spectrum of 2009cd
obtained on Mar. 16 shows it to be a normal type-IIP supernova at z = 0.143;
additional magnitudes for 2009cd:  Feb. 20, g' = 21.6 +/- 0.1, r' = 21.9 +/-
0.1.  The apparent host galaxy of 2009cd has magnitudes g' = 21.21 +/- 0.03
and r' = 21.18 +/- 0.02.  A spectrum of 2009ce obtained on Mar. 17 shows it
to be a normal type-Ia supernova (at z = 0.095), roughly 25 days after
maximum; additional magnitudes for 2009ce:  Feb. 20, g' = 18.5 +/- 0.15, r'
= 18.3 +/- 0.15.  The apparent host galaxy of 2009ce has magnitudes g' =
19.29 +/- 0.03 and r' = 18.69 +/- 0.01.  A spectrum of 2009cf obtained on
Mar. 17 shows it to be similar to SN 1984L, a normal type-Ib supernova
roughly 30 days after maximum at z = 0.09; the apparent host galaxy of 2009cf
has magnitudes g' = 21.52 +/- 0.02 and r' = 21.21 +/- 0.02.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 April 4                     (CBET 1753)              Daniel W. E. Green