Electronic Telegram No. 1791
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 2009du-2009dy
     Further to CBET 1780, A. J. Drake, S. G. Djorgovski, A. Mahabal, R.
Williams and M. J. Graham, California Institute of Technology; A. S. Moskvitin,
T. A. Fatkhullin, V. V. Sokolov, O. I. Spiridonova, and A. F. Valeev, Special
Astrophysical Observatory (SAO), Russian Academy of Sciences; E. Sonbas,
Cukurova University; S. B. Pandey, B. Kumar, and R. Roy, Aryabhatta Research
Institute of Observational Sciences, Nainital; D. Y. Tsvetkov, Sternberg
Astronomical Institute, Moscow State University; M. Catelan, Pontificia
Universidad Catolica de Chile; E. C. Beshore and S. M. Larson, Lunar and
Planetary Laboratory, University of Arizona; and E. Christensen, Gemini
Observatory, report the CRTS discovery of five additional supernovae in
unfiltered Catalina Sky Survey images:

 SN       2009 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2009du   Apr. 17.31   13 39 46.36  -21 27 19.1   19.4       --
 2009dv   Apr. 18.41   13 24 40.15  +16 34 05.5   19.3    14".4 E, 13".1 N
 2009dw   Apr. 21.28   13 36 09.45  +34 03 19.0   19.2    1".5 W, 0".8 S
 2009dx   Apr. 21.41   16 49 25.67  + 5 52 48.1   18.8    0".5 W, 3".5 S
 2009dy   Apr. 22.39   15 01 04.03  +43 13 13.9   18.4    0".7 E, 0".3 S

Confirming spectrograms (range 370-730 nm) of 2009dy and 2009dw were taken
with the BTA 6-m telescope on Apr. 23 UT; with the aid of the Supernova
Identification code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), 2009dy
is found to be a type-Ia supernova at z = 0.089 and is most similar to SN
1994ae at six days after maximum, while 2009dw is a type-IIP supernova at
z = 0.042 and is most similar to SN 2004et at 15 days after maximum.
Confirming spectrograms (range 380-680 nm) of 2009dx, 2009dv, and 2009du
were taken with the Palomar 5-m telescope (+ DBSP) on Apr. 29.  SN 2009dx is
a type-Ia supernova at z = 0.042 and is most similar to SN 2003du at one day
before maximum.  SN 2009dv is a type-IIP supernova at z = 0.029 and is most
similar to SN 2004et at ten days after maximum.  SN 2009du is a subluminous
type-Ia supernova at z = 0.062 and is similar to SN 1997cn at four days
after maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 May 4                       (CBET 1791)              Daniel W. E. Green