Electronic Telegram No. 3866
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


SUPERNOVA 2014aw
     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; and S. M. Larson and E.
Christensen, Lunar and Planetary Laboratory, University of Arizona, report the
Catalina Real-time Transient Survey discovery of an apparent supernova in
unfiltered Catalina Sky Survey (CSS) images:

 SN       2014 UT        R.A. (2000.0) Decl.       Mag.
 2014aw   Apr. 25.46   16 10 23.61  +47 04 40.3    16.5

Additional CSS magnitudes for 2014aw:  Apr. 2.45, [20.8; May 4.43, 16.4.

     D. D. Balam, Dominion Astrophysical Observatory, National Research
Council of Canada; M. L. Graham, Las Cumbres Observatory Global Telescope,
University of California at Santa Barbara; and E. Y. Hsiao, Las Campanas
Observatory, report that a spectrogram (range 369-700 nm, resolution 0.3 nm)
of 2014aw, obtained on May 7.44 UT with the 1.82-m Plaskett Telescope of the
National Research Council of Canada, shows it to be a type-Ia supernova about
one week after maximum light.  Cross-correlation with a library of supernova
spectra using the "Supernova Identification" code (Blondin and Tonry 2007,
Ap.J. 666, 1024) indicates that 2014aw is most similar to the type-Ia
supernova 1993ac at seven days post-maximum light.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 May 8                       (CBET 3866)              Daniel W. E. Green