[IAUC] CBET 1676: 20090201 : SUPERNOVAE 2009R, 2009S, AND 2009T

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                                                  Electronic Telegram No. 1676
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVAE 2009R, 2009S, AND 2009T
     Further to CBET 1589, A. J. Drake, S. G. Djorgovski, R. Williams, A.
Mahabal, and M. J. Graham, California Institute of Technology; M. Catelan,
Pontificia Universidad Catolica; E. C. Beshore, S. M. Larson, and R. Hill,
Lunar and Planetary Laboratory, University of Arizona; and E. Christensen,
Gemini Observatory, report the CRTS discovery of three apparent supernovae
in unfiltered Catalina Sky Survey (CSS) images:

SN       2008 UT       R.A. (2000.0) Decl.       Mag.      Offset
2009R    Jan.  2.46   11 51 10.62 +24 40 22.5    19.2
2009S    Jan. 26.22   09 32 30.11 +17 41 19.8    17.7   17".5 W, 13".0 S
2009T    Jan. 30.51   13 51 21.72 +14 08 37.6    16.7            2" N

The Palomar 1.52-m reflector was used for follow-up photometry with Gunn g,
r, and i filters, as listed below when CSS images were not used for the
measured magnitudes.  Additional magnitudes for 2009R:  2008 June 24.21 UT,
[20.4 (CSS); Dec. 6.50, 19.1 (CSS); 2009 Jan. 4.51, g = 19.6, r = 19.73;
29.42, 19.7 (CSS).  Additional magnitudes for 2009S:  2008 Dec. 20.36, [20.0
(CSS); 2009 Jan. 29.17, g = 18.15.  Additional magnitudes for 2009T:  Jan.
31.34, g = 17.3, r = 16.8, i = 16.7.
     The apparent host galaxy of 2009R resides in a cluster of galaxies at
redshift fit z = 0.13 and has Gunn magnitudes u = 22.9, g = 21.6, r = 21.2,
i = 21.0, and z = 21.4.  The apparent host galaxy of 2009S, 2MASX
J09323134+1741326, has redshift z = 0.049 and Sloan Digital Sky Survey
(SDSS) Gunn magnitudes u = 17.9, g = 16.3, r = 15.7, i = 15.4, and z = 15.2.
SDSS images indicate that 2009T is associated with an extended host galaxy
(SDSS J135121.68+140835.2) with Gunn magnitudes u = 19.5, g = 18.8, r = 18.6,
i = 18.4, z = 18.4; additional CSS observations on eleven nights between 2007
Dec. 3 and 2008 Dec. 2 show the apparent host galaxy of 2009T as an
unresolved source of constant brightness (mag 18.3).  Finding charts, light
curves, etc., can be found at the following website URL:
http://nesssi.cacr.caltech.edu/catalina/AllSN.html.


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

                         (C) Copyright 2009 CBAT
2009 February 1                  (CBET 1676)              Daniel W. E. Green