Temperatures T_F and masses M_F derived from fitting F_ν of both isolated and embedded starless cores vs. the true model values of T_M and M for three β values (1.67, 2, 2.4). For various subsets Φ_n of fluxes, results from successful thinbody and modbody fits (Sect. 3.4) are displayed by the colored and gray lines, respectively. Error bars represent the 1 × σ uncertainties of the derived parameters returned by the fitting routine combined with the assumed ± 20% uncertainties of η, κ₀, and D (Sect. 3.4). The black solid lines show the locations where T_F and M_F are equal to the true values. To preserve clarity of the plots, much less accurate modbody results are displayed only for correct β = 2 and without error bars.