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This paper describes a pilot study into the spectral energy distribution(SED) fitting and the derivation of physical parameters for 19 galaxiesobserved as part of the Great Observatories All-sky LIRG Survey (GOALS) surveyas observed with the \emph{Spitzer Space Telescope}. For this we have used thepan-spectral fitting tools developed in a series of papers by Dopita and hisco-workers. We show that the standard Lee and Draine `astronomical silicate'model cannot provide a good fit to the silicate absorption features as observedin the heavily dust-extinguished ($A_{\rm V} \sim 50$mag.) starbursts. We havederived an empirical fit to the `starburst silicate' absorption in theseobjects. This absorption curve is consistent with the silicate grains beingsystematically larger in starburst environments than in the local Galacticinterstellar medium. We demonstrate the sensitivity of the SED fitting to eachof the fitted parameters, and derive these parameters for those galaxies whichdo not have an embedded AGN. This technique is simple and provides reasonablyrobust and uniform parameters for the starburst, especially as far as the starformation rate, population of old stars, compactness of the starburst regionand total foreground extinction are concerned. However, the chemical abundancesand the optical extinction cannot be reliably determined by this analysis, andoptical SEDs will also be required to provide a complete characterization ofthe starburst region and of the surrounding galaxy.

Modeling IR Spectral Energy Distributions: A Pilot Study of Starburst Parameters and Silicate Absorption Curves for Some GOALS Galaxies