Fig. 4: Comparison of OGLE16aaa with other TDEs in the evolution of optical to X-ray luminosity ratio.
From: X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary
The optical luminosity refers to the integrated blackbody luminosity from the SED fittings to the Swift UVOT photometry. For epochs where only UV observation at one band is available (t = [300, 490] days), we extrapolated the UV luminosity to the blackbody luminosity by assuming a constant temperature evolution since t = 150 days. For the X-ray non-detections, the corresponding 3σ upper limits are given. Red symbols represent the luminosity ratios of OGLE16aaa at different epochs. For comparison, we also plotted the ratios for other X-ray bright TDEs from5,6,39, as noted in the legend. ASASSN-14li17 is the only TDE that shows nearly constant optical to X-ray luminosity ratios since discovery. Although OGLE16aaa appears to follow the evolution trend as other TDEs, the time of rise to peak is distinct.
