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We have revisited the target EON_10.477_41.954 in order to determine moreaccurately the uncertainties in the model parameters that are important fortarget classification (i.e., galaxies with or without substantial extraplanardust). We performed a Markov-Chain Monte Carlo (MCMC) analysis for the fifteenparameters of the three-dimensional radiative-transfer galaxy model we usedpreviously for target classification. To investigate the convergence of theMCMC sampling---which is usually neglected in the literature but should notbe---we monitored the integrated autocorrelation time ($\tau_{int}$), and weachieved effective sample sizes $>5,650$ for all the model parameters. Theconfidence intervals are unstable at the beginning of the iterations where thevalues of $\tau_{int}$ are increasing, but they become stable in lateriterations where those values are almost constant. The final confidenceintervals are $\sim5-100$ times larger than the nominal uncertainties used inour previous study (the standard deviation of three best-fit results). Thus,those nominal uncertainties are not good proxies for the model-parameteruncertainties. Although the position of EON_10.477_41.954 in thetarget-classification plot (the scale-height to diameter ratio of dust vs thatof light-source) decreases by about $20-30$ % when compared to our previousstudy, its membership in the ``high-group''---i.e., among galaxies withsubstantial extraplanar dust---nevertheless remains unchanged.

monthly notices of the royal astronomical society

Seeking Edge-on Galaxies with Substantial Extraplanar Dust Using a  Radiative Transfer Model: Determination of the Model Parameter Uncertainties  for EON_10.477_41.954 (FGC 79)