## source for the margin of error of curvature

I have seen in a few places around the web that the margin of error for the flatness of the universe is about 2%, but haven't seen any citations. Could anyone refer me to a reputable paper that I could cite that mentions what this margin of error is?

Thanks!
 PhysOrg.com science news on PhysOrg.com >> New language discovery reveals linguistic insights>> US official: Solar plane to help ground energy use (Update)>> Four microphones, computer algorithm enough to produce 3-D model of simple, convex room
 Recognitions: Homework Help Science Advisor A quick arxiv search gave me this paper from Oct 2007: http://arxiv.org/abs/astro-ph/0703780
 Recognitions: Science Advisor You can get better constraints by adding baryon acoustic oscillation and supernova data to the WMAP result. They estimate the following parameters for w = constant: http://lambda.gsfc.nasa.gov/product/..._bao_snall.cfm The curvature parameter is: $$-0.0175 < \Omega_k < 0.0085$$ (95% confidence) ...which is a significantly tighter confidence interval than is given in the above paper.

## source for the margin of error of curvature

Great, thanks!

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