AAS 206th Meeting, 29 May - 2 June 2005
Session 45 Supernovae Observations and Theory
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

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[45.11] Preliminary Results from the ESSENCE Project

G. Miknaitis (University of Washington), C. Aguilera (CTIO/NOAO), B. Barris (IfA/UH), A. C. Becker (UW), S. Blondin (ESO), P. Challis (CfA), R. Chornock (UCB), A. Clocchiatti (PUC), R. Covarrubias (UW), A. V. Filippenko (UCB), P. Garnavich (NDU), M. Hicken (CfA/Harvard), S. Jha (UCB), R. P. Kirshner (CfA/Harvard), K. Krisciunas (NDU), B. Leibundgut (ESO), W. D. Li (UCB), T. Matheson (NOAO), A. Miceli (UW), J. L. Prieto (OSU), A. Rest (CTIO/NOAO), A. G. Riess (STScI), M. E. Salvo, B. P. Schmidt (ANU), R. C. Smith (CTIO/NOAO), J. Sollerman (Stockholm Obs.), J. Spyromilio (ESO), C. Stubbs (CfA/Harvard), N. B. Suntzeff (CTIO/NOAO), J. L. Tonry (IfA/UH), W. M. Wood-Vasey (CfA/Harvard)

We present preliminary results from the first three years of the ESSENCE project, a supernova survey aimed at better constraining the equation of state parameter of the dark energy. We present initial photometry from the MOSAIC II imager at the CTIO 4m for ~80 supernovae at redshifts of 0.2 < z < 0.8. We discuss characteristics of the sample of objects found, and assess the impact of various sources of systematic error on the determination of cosmological distances using these data.

This work is partially supported by grant AST-0206329 from the US National Science Foundation.

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© 2005. The American Astronomical Soceity.