Summary: SF2A 2007
J. Bouvier, A. Chalabaev, C. Charbonnel (eds)
THE NEARBY SUPERNOVA FACTORY: TOWARD A HIGH-PRECISION
Y. Copin1, on behalf of the Nearby Supernova Factory, C. Buton1, E. Gangler1, G. Smadja1, E.
P“econtal2, G. Rigaudier2, P. Antilogus3, S. Bailey3, R. Pain3, R. Pereira3, C. Wu3, G. Aldering4, C.
Aragon4, S. Bongard4, M. Childress4, S. Loken4, P. Nugent4, S. Perlmutter4, K. Runge4, R. C.
Thomas4, B. A. Weaver4 , C. Baltay5, A. Bauer5, D. Rabinowitz5 and R. Scalzo5
Abstract. The Nearby Supernova Factory (SNfactory) is an international project to discover and study
a large sample of type Ia supernovae in the redshift range 0.03 < z < 0.08. Follow-up spectro-photometric
observations are performed using the dedicated Supernovae Integral-Field Spectrograph, mounted since 2004
on 2.2 m UH telescope. The goal is to acquire for each supernova and over its full life-time (more than 10
epochs) high spectro-photometric quality spectra over the extended optical range (3201000 nm).
I will present the current status of the SNfactory project, from search efficiency to first scientific results,
with an emphasis on the spectro-photometric calibration issues and achievements.
Due to their high intrinsic luminosity and their standardizable aspect, type Ia supernovę (SNe Ia) are among
the finest distance indicators for cosmology. High redshift observations played a major role in the discovery of
the "dark energy" component of the universe (e.g. Leibundgut 2001 and references therein).
As expressed by Linder (2006), nearby SNe Ia (typically z < 0.2) play two important roles for cosmological