Dark Energy Constraints From The Essence Supernova Survey: Five-year Results

Details Dark Energy Constraints From The Essence Supernova Survey: Five-year Results Dark Energy Constraints From The Essence Supernova Survey: Five-year Results

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.7702w&link_type=abstract

American Astronomical Society Meeting 210, #77.02; Bulletin of the American Astronomical Society, Vol. 39, p.184

Astronomy and Astrophysics

Astronomy

Scientific paper

The ESSENCE supernova survey is a six-year project on the CTIO 4-m telescope to discover and study 200 Type Ia supernovae to determine the properties of the dark energy currently accelerating the expansion of the Universe. We present here our five-year cosmology results which constrain a constant dark energy equation-of-state parameter to better than 10%. Our latest work features improved photometric calibration, more sophisticated treatment of systematic errors, and improved statistical constraints from a doubling of our previous sample of supernovae.

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