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Astronomy and Astrophysics 423 (2004) 881-894
Type Ia supernova rate at a redshift of ~ 0.1
G. Blanc1, C. Afonso1, 2, C. Alard3, J.N. Albert4, G. Aldering, A. Amadon1, J. Andersen, R. Ansari4, E. Aubourg1, C. Balland5, 6, P. Bareyre1, 2, J.P. Beaulieu7, X. Charlot1, A. Conley, C. Coutures1, T. Dahlen, F. Derue5, X. Fan, R. Ferlet7, G. Folatelli, P. Fouque8, G. Garavini, J.F. Glicenstein1, B. Goldman1, 2, A. Goobar1, A. Gould1, D. Graff, M. Gros1, J. Haissinski4, C. Hamadache1, D. Hardin5, I.M. Hook, J. Dekat1, S. Kent, A. Kim, T. Lasserre1, L. LeGuillou1, E. Lesquoy1, 7, C. Loup7, C. Magneville1, J.B. Marquette7, E. Maurice, A. Maury, A. Milsztajn1, M. Moniez4, M. Mouchet9, H. Newberg, S. Nobili, N. Palanque-Delabrouille1, O. Perdereau4, L. prevot, Y.R. Rahal4, N. Regnault4, 10, J. Rich1, P. Ruiz-Lapuente, M. Spiro1, P. Tisserand1, A. Vidal-Madjar7, L. Vigroux1, N.A. Walton, S. Zylberajch1
For the EROS collaboration(s)
(2004)

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection efficiency, using a Monte Carlo simulation, provides the type Ia supernova explosion rate at a redshift ~ 0.13. The result is $0.125^{+0.044+0.028}_{-0.034-0.028} h_{70}^2$ SNu where 1 SNu = 1 SN / $10^{10} L_{sun}^B$ / century. This value is compatible with the previous EROS measurement (Hardin et al. 2000), done with a much smaller sample, at a similar redshift. Comparison with other values at different redshifts suggests an evolution of the type Ia supernova rate.
1:  DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
2:  PCC - Physique Corpusculaire et Cosmologie - Collège de France
3:  GEPI - Galaxies, Etoiles, Physique, Instrumentation
4:  LAL - Laboratoire de l'Accélérateur Linéaire
5:  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6:  IAS - Institut d'astrophysique spatiale
7:  IAP - Institut d'Astrophysique de Paris
8:  UMS 831 - UMS 831 unité mixte de service
9:  LUTH - Laboratoire Univers et Théories
10:  LLR - Laboratoire Leprince-Ringuet
Sciences of the Universe/Astrophysics

Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics
Fulltext link: 
http://fr.arXiv.org/abs/astro-ph/0405211