The black curves and points show quasi-simultaneous PS1 and GALEX photometry. The magenta curves show quasi-simultaneous continuum measurements from SDSS spectra along with XMM-Newton data. The colored curves are measurements from SDSS-RM spectra going from early (red) to mid (grey) to late (blue) epochs. The optical SED
Host galaxy subtracted, rest frame, optical to X-ray SEDs. The black curves and points show quasi-simultaneous PS1 and GALEX photometry. The magenta curves show quasi-simultaneous continuum measurements from SDSS spectra along with XMM-Newton data. The colored curves are measurements from SDSS-RM spectra going from early (red) to mid (gray) to late (blue) epochs. The optical SEDs are consistent with power laws. In the lower state, the SED peak appears to be redwards of the GALEX NUV point. In the GALEX higher state and most of the SDSS-RM spectra, the peak is bluewards of our observing band. Where measured, the X-ray luminosity is relatively high but well below that of the bluest optical band. During the dramatic rise in 2018, the SED reddens to become completely flat across the optical band.