[IAUC] CBET 1766: 20090415 : SUPERNOVAE 2008iw, 2008ix, 2009bx, AND 2009de-2009dk

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                                                  Electronic Telegram No. 1766
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)
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SUPERNOVAE 2008iw, 2008ix, 2009bx, AND 2009de-2009dk
     A. J. Drake, S. G. Djorgovski, A. Mahabal, R. Williams, and M. J. Graham,
California Institute of Technology; 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 discovery via the Catalina Real-time Transient Survey (cf. CBETs
1523, 1760) of numerous additional supernovae in unfiltered Catalina Sky
Survey images.  Spectroscopic follow-up was carried out with the 5.1-m
Palomar Hale telescope (+ DBSP) on 2008 Oct. 1, 2009 Feb. 25, and Apr. 1 UT.
Spectroscopic classification was done with the aid of the Supernova
Identification code of Blondin and Tonry (2007, Ap.J. 666, 1024).  The
confirmed supernovae below are all type-Ia events except for 2009de
(possibly type Ic), 2009dh (type IIp), and 2009di (type Ic).

SN       2008 UT        R.A. (2000.0) Decl.      Mag.    Offset      z
2008iw   Sep. 21.35   23 06 20.03  + 9 40 37.6   19.3     --        0.11
2008ix   Oct.  1.32    0 37 04.77  - 6 09 39.2   19.0     --        0.09

SN       2009 UT        R.A. (2000.0) Decl.      Mag.    Offset           z
2009de   Jan.  2.52   13 00 37.49  +17 50 57.0   18.8     --             0.14
2009df   Mar.  1.51   16 05 52.67  +17 24 45.5   18.6   0".3 W, 0."4 N   0.12
2009dg   Mar.  3.32   11 33 44.93  +14 34 47.9   19.5     --             0.09
2009dh   Mar.  3.43   13 58 19.38  +20 10 51.1   18.8   0".4 W, 0".6 N   0.06
2009di   Mar. 21.26   11 36 57.86  +45 00 50.7   18.6   0".4 E, 0".5 N   0.13
2009dj   Mar. 24.34   13 58 34.75  +31 12 52.3   19.1   0".9 E, 0".1 N   0.12
2009dk   Apr.  1.29   11 30 23.64  + 2 14 35.2   19.5     --             0.08

SN 2009de was initially designated as PSN K0901-1 on CBET 1682.  No clear
host galaxy is seen in past images from various surveys covering the fields
of 2008iw, 2009de, 2009dg, and 2009dk.  In addition, 2009bx (cf. CBET 1744)
was found to be a type-Ia supernova at redshift z = 0.07 in Palomar 5.1-m
telescope observations.


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                         (C) Copyright 2009 CBAT
2009 April 15                    (CBET 1766)              Daniel W. E. Green