[IAUC] CBET 1744: 20090329 : SUPERNOVA 2009bx

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                                                  Electronic Telegram No. 1744
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2009bx
     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 (cf. CBETs 1693, 1713, 1733) discovery of an apparent
supernova in unfiltered Catalina Sky Survey (CSS) images:

 SN       2009 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2009bx   Feb. 16.37   10 09 10.10  + 7 54 34.4   18.7    1".3 W, 0".5 N

Further magnitudes for 2009bx, in part from CCD images taken by the authors
with the Palomar 1.52-m reflector (+ Gunn filters) and in part by A.
Moskvitin (Special Astrophysical Observatory, presumably with the 1.02-m
Zeiss telescope):  Jan. 17.53 UT, [20.4 (CSS); Feb. 20.15, g = 18.8, r =
18.6; Feb. 27.84, B = 18.8 +/- 0.2, V = 18.9 +/- 0.1, R = 18.45 +/-
0.23 (Moskvitin); Mar. 17.25, 19.4 (CSS).  The faint host galaxy, SDSS
J100910.19+075433.9, has Gunn magnitudes > 21.


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                         (C) Copyright 2009 CBAT
2009 March 29                    (CBET 1744)              Daniel W. E. Green