Electronic Telegram No. 2971
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVAE 2011ju, 2011jv, 2011jw
     A. J. Drake, S. G. Djorgovski, M. J. Graham, A. Mahabal, and R. Williams,
California Institute of Technology; J. L. Prieto, Princeton 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 discovery of three apparent
supernovae in unfiltered Catalina Sky Survey (CSS) images:

 SN       2011 UT        R.A. (2000.0) Decl.       Mag.      Offset
 2011ju   Dec. 25.35    8 10 43.55  +40 25 29.6    19.2       2" S
 2011jv   Dec. 27.27    4 48 02.55  - 4 08 22.6    18.8       1" N
 2011jw   Dec. 27.50   10 47 41.70  + 2 18 15.4    19.3

Additional CSS magnitudes for 2011ju:  2011 Dec. 16.53 UT, [20.1; 30.41,
19.2.  Additional CSS magnitudes for 2011jv:  2011 Nov. 28.38, [20.3; 2012
Jan. 2.23, 18.6.  Additional CSS magnitudes for 2011jw:  2011 June 6.18,
[20.2; 2012 Jan. 2.43, 19.5.

     J. L. Prieto, Princeton University, reports that optical spectra (range
350-960 nm; resolution 0.7 nm) of SN 2011ju, 2011jv, and 2011jw were
obtained with the APO 3.5-m telescope (+ DIS) on Jan. 2 UT, showing all to be
type-Ia supernovae.  After cross-correlation with a library of supernova
spectra using SNID (Blondin and Tonry 2007, Ap.J. 666, 1024), the following
redshifts and approximate phases (in days after maximum light) were obtained:
2011ju, 0.103, -2 days; 2011jv, 0.082, +2 days; 2011jw, 0.049, +26 days.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 January 8                   (CBET 2971)              Daniel W. E. Green