Type Ia Supernova Rate as a Function of Redshift From The First 3 Years of The SuperNova Legacy Survey

Details Type Ia Supernova Rate as a Function of Redshift From The First 3 Years of The SuperNova Legacy Survey Type Ia Supernova Rate as a Function of Redshift From The First 3 Years of The SuperNova Legacy Survey

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110511r&link_type=abstract

American Astronomical Society, AAS Meeting #211, #105.11; Bulletin of the American Astronomical Society, Vol. 39, p.930

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a measurement of the Type Ia supernova (SN Ia) rate as a function of redshift, based on the first 3 years of the SuperNova Legacy Survey (SNLS).
Supernova candidates were detected and light-curves derived on images obtained for the deep survey of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS), covering four 1 square degree fields, while spectroscopy of SNe Ia candidates was obtained at VLT, Gemini and Keck telescopes.
A complete re-processing of the imaging survey was performed with an automated procedure, producing an unbiased sample of about 400 SN Ia candidates. About 200 of these candidates had been spectroscopically followed and identified during the "real-time" operations.
A detailed "on image" SN Ia simulation was performed to derive precise detection and identification efficiencies.
Using both photometric and spectroscopic redshift (when available), we have derived a SN Ia explosion rate in redshift bins of 0.1 between z=0.2 and z=1.2 and compared this measurement with predictions based on cosmic star formation history models.

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