The core-collapse rate from the Supernova Legacy Survey

The core-collapse rate from the Supernova Legacy Survey

অন্যান্য সংস্করণ প্রদর্শন করুন (1)

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 supemovae br...

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প্রধান লেখক: Bazin, G, Palanque-Delabrouille, N, Rich, J, Ruhlmann-Kleider, V, Aubourg, E, Le Guillou, L, Astier, P, Balland, C, Basa, S, Carlberg, R, Conley, A, Fouchez, D, Guy, J, Hardin, D, Hook, I, Howell, D, Pain, R, Perrett, K, Pritchet, C, Regnault, N, Sullivan, M, Antilogus, P, Arsenijevic, V, Baurnont, S, Fabbro, S
বিন্যাস: Journal article
ভাষা:English
প্রকাশিত: 2009
বিবরন
সংক্ষিপ্ত: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 supemovae brighter than i' ∼ 24. Using host photometric redshifts, we measure the supernova absolute magnitude distribution down to luminosities 4.5 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.)]*10-4 yr-1 (h-170 Mpc)-3. © ESO 2009.

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