Comparison of synthetic and observed photometry for HVS 1: top panel: SED. The colored data points (GALEX: violet, SDSS: blue; Pan-STARRS: green; Gaia: cyan; VST-KiDs: dark green; VISTA: dark red; UKIDSS: red) are filter-averaged fluxes which were converted from observed magnitudes (the respective filter widths are indicated by the dashed horizontal lines), while the gray solid line represents a model that is based on the spectroscopic parameters given in Table 1. Only the angular diameter and the color excess were fitted. The flux is multiplied with the wavelength to the power of three to reduce the steep slope of the SED on such a wide wavelength range. The residual panel at the bottom shows the differences between synthetic and observed magnitudes.