Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.6312l&link_type=abstract
American Astronomical Society Meeting 204, #63.12; Bulletin of the American Astronomical Society, Vol. 36, p.778
Astronomy and Astrophysics
Astronomy
Scientific paper
The Nearby Supernova Factory (SNfactory) will obtain and study a uniform high-quality dataset of flux-calibrated optical spectra at 10-15 epochs, starting 5-15 days before maximum light, for each of approximately 300 nearby Type Ia supernovae (SNe Ia). When combined with current (SCP, HZSST, SNLS, ESSENCE) and future (SNAP, LSST) datasets of high-redshift SNe Ia, the SNfactory dataset will substantially improve the statistical measurements of the dark energy equation of state. This project will also improve our understanding of SNe Ia and their use as standardized candles.
The SNfactory targets SNe Ia in the redshift range of z approx. 0.03 to 0.08; near enough to allow spectral observations every few days of many SNe while still distant enough to be in the smooth Hubble flow and minimize relative luminosity errors due to peculiar velocities. The SNe are found in wide-field imaging data provided by the Palomar Consortium (Yale/JPL/Caltech) and by the Near Earth Asteroid Tracking (NEAT) project at JPL, making the search unbiased with respect to host galaxy type. The identification and followup spectra will typically start within 1-3 days of the discovery epoch, using the SuperNova Integral Field Spectrograph (SNIFS) instrument which is to be installed on the automated University of Hawaii 2.2m telescope in April of this year. Here we present the current project status in the first weeks after the installation of SNIFS.
Adam Gerhard
Aldering Greg
Antilogus Pierre
Astier Pierre
Bacon Roland
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