Comparison of synthetic spectra with photometric data for HZ 44 (top) and HD 127493 (bottom). The three black data points labeled “box” are binned fluxes from a low-dispersion IUE spectrum. Filter-averaged fluxes are shown as colored data points that were converted from observed magnitudes (the dashed horizontal lines indicate the respective filter widths), while the gray solid line represents a synthetic spectrum using the atmospheric parameters given in Table 2. The residual panels at the bottom and right-hand side show the differences between synthetic and observed magnitudes as well as colors. The following color codes are used to identify the photometric systems: Johnson–Cousins (blue), Strömgren (green), Gaia (cyan), UKIDSS (rose), 2MASS (red), and WISE (magenta).
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