Why I do not believe you, and this is not personal
https://www.cfa.harvard.edu/supernova/home.html
Now for falsification of quinessence
http://supernova.lbl.gov/
http://www.slac.stanford.edu/econf/C990809/docs/perlmutter.pdf
review the last link, i.e. it kills a time varying cosmological constant
quote
I was asked to present the status of the cosmological parameters, and in particular
the status of the recent results concerning the accelerating universe--and
the possible cosmological constant or dark energy that is responsible for the
universe's acceleration. This result comes most directly from the recent type Ia
supernova work, so although I will mention a few of the approaches to the cosmological
parameters, I will emphasize the work with the type Ia supernovae. I
will try to give you a sense of exactly how we reached the current conclusions
and what the current level of confidence is in that conclusion.
end of quote
then see
To summarize, the current type Ia supernova data suggests that we live in an
accelerating universe, a universe with either a positive cosmological constant or
some other dark energy with strongly negative pressure. This statement can
be made with great confidence if you have reason to believe that we live in a
flat universe, either based on the cosmological microwave background data or
based on the predictions of the inflationary universe theory. The best fit in a
flat universe is approximately ΩM = 0.7 and ΩΛ = 0.3. Even if you are not
yet convinced by the current data (or inflationary theory) that we live in a flat
universe, and consider the possibility that the universe is open and low-mass, the
positive-Λ supernova results are still statistically quite strong and we have not
yet been able to identify any systematic uncertainty that could reconcile our data
with zero Λ. The loopholes that remain in this last statement will be addressed
with upcoming data from the new low-redshift supernova campaign and the new
very-high-redshift supernova work.