Links
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- [hal.in2p3.fr] | PDF
- [hal.in2p3.fr] | PDF
- [hal.in2p3.fr] | PDF
- [arxiv.org] | PDF
- [www.researchgate.net] | PDF
- [arxiv.org] | PDF
- [arxiv.org] | PDF
- [citeseerx.ist.psu.edu] | PDF
- [hal.in2p3.fr] | PDF
Tools
The core-collapse rate from the Supernova Legacy Survey
,
P. Astier,
C. Balland,
S. Basa,
Rg G. Carlberg,
A. Conley,
D. Fouchez,
J. Guy,
D. Hardin,
Im M. Hook
and other authors.
Abstract
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 $i^\prime∼24$. 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 $4.5±0.8(stat.) ±0.6 (sys.)$. This corresponds to a core-collapse rate at $z=0.3$ of $[1.42± 0.3(stat.) ±0.3(sys.)]\times10^{-4}\yr^{-1}(h_{70}^{-1}\Mpc)^{-3}$. Comment: accepted Astronomy and Astrophysics