[IAUC] CBET 1791: 20090504 : SUPERNOVAE 2009du-2009dy
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Electronic Telegram No. 1791
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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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superseded by text appearing later in the printed IAU Circulars.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
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