Fig. 2.
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Left panel: Spectral energy distribution fitting for a single sdB (ZTF-sdBV1) where the gray line represents the best fitting sdB model spectrum. Right panel: Composite spectral energy distribution fitting for an sdB + cool companion (ZTF-sdBV6) where the blue line denotes the sdB model and the red line shows the cool companion model from the PHOENIX grid, while the gray line is the composite spectrum. Colored points on both panels represent photometric flux measurements from a variety of sources, which are listed in Appendix C.
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