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Photometric data of galaxies covering the rest-frame wavelength range fromfar-UV to far-IR make it possible to derive galaxy properties with a highreliability by fitting the attenuated stellar emission and the related dustemission at the same time. For this purpose we wrote the code CIGALE (CodeInvestigating GALaxy Emission) that uses model spectra composed of the Maraston(or PEGASE) stellar population models, synthetic attenuation functions based ona modified Calzetti law, spectral line templates, the Dale & Helou dustemission models, and optional spectral templates of obscured AGN. Depending onthe input redshifts, filter fluxes are computed for the model set and comparedto the galaxy photometry by carrying out a Bayesian-like analysis. CIGALE wastested by analysing 39 nearby galaxies selected from SINGS. The reliability ofthe different model parameters was evaluated by studying the resultingexpectation values and their standard deviations in relation to the input modelgrid. Moreover, the influence of the filter set and the quality of photometricdata on the code results was estimated. For up to 17 filters between 0.15 and160 mum, we find robust results for the mass, star formation rate, effectiveage of the stellar population at 4000 A, bolometric luminosity, luminosityabsorbed by dust, and attenuation in the far-UV. A study of the mutualrelations between the reliable properties confirms the dependence of starformation activity on morphology in the local Universe and indicates asignificant drop in this activity at about 10^11 M_sol towards higher totalstellar masses. The dustiest sample galaxies are present in the same massrange. [abridged]

Analysis of galaxy SEDs from far-UV to far-IR with CIGALE: Studying a SINGS test sample