| G. Bazin, N. Palanque-Delabrouille,J. Rich, V. Ruhlmann-Kleider,
E. Aubourg, L. Le Guillou,P. Astier, C. Balland,
S. Basa, R. G. Carlberg, A. Conley, D. Fouchez, J. Guy,
D. Hardin, I. M. Hook, D. A. Howell,
R. Pain, K. Perrett,C. J. Pritchet, N. Regnault,
M. Sullivan, P. Antilogus,V. Arsenijevic, S. Baumont,
S. Fabbro,J. Le Du, C. Lidman, M. Mouchet,
A. Mour~ao, E. S. Walker
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| We use three years of data from the Supernova Legacy Survey (SNLS)
to study the general properties of core-collapse and type Ia supernovae.
This is the first such study using the ``rolling search\'\' technique
which guarantees well-sampled SNLS light curves and good efficiency for
supernovae brighter than $i^\\prime\\sim24$.
Using host photometric redshifts,
we measure the supernova absolute magnitude distribution
down to luminosities $4.5\\,{\\rm mag}$ fainter than normal SNIa.
Using spectroscopy and light-curve fitting to
discriminate against SNIa,
we find a sample of 117 core-collapse supernova candidates with
redshifts $z<0.4$
(median redshift of 0.29)
and measure their rate to be larger than
the type Ia supernova rate by a factor $4.5\\pm0.8(stat.)\\, \\pm0.6 (sys.)$.
This corresponds to a core-collapse rate at $z=0.3$ of
$[1.42\\pm 0.3(stat.)\\,\\pm0.3(sys.)]\\times10^{-4}\\yr^{-1}(h_{70}^{-1}\\Mpc)^{-3}$.
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