FERMI-LAT-SCIENTIFIC PLOTS
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Upper panel: Examples of approximate localization of the synchrotron SED component peak for two orbits of simultaneous observations with Swift and NuSTAR. The Swift data are shown as black filled symbols (diamonds for the UVOT and squares for the XRT) and the NuSTAR data are shown as black empty squares. Empty diamonds represent R-band data. For each of the epochs we show a log-parabolic curve fit to X-ray data alone (yellow) and all data (purple). For each curve, we mark the SED peak with an empty circle of matching color. Lower panel: Results of the SED peak localization based on data from strictly simultaneous Swift and NuSTAR orbits. The colored data points show ν syn.peak and (νFν) syn.peak, i.e., the frequency of the SED peak and the flux at the peak. The assumption of the log-parabolic model connecting the UV/optical and X-ray data (purple empty circles) reveals a proportionality between log(νFν) syn.peak and logνsyn.peak; the dashed black line shows a linear fit best describing that relation. The other method (using only X-ray data) does not show a similar relation. In comparison with the observations published previously, shown here with different hatched grey regions, in 2013 January–March we observed a state in which the peak occurred at atypically low energy and high flux.
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Upper panel: Examples of approximate localization of the synchrotron SED component peak for two orbits of simultaneous observations with Swift and NuSTAR. The Swift data are shown as black filled symbols (diamonds for the UVOT and squares for the XRT) and the NuSTAR data are shown as black empty squares. Empty diamonds represent R-band data. For each of the epochs we show a log-parabolic curve fit to X-ray data alone (yellow) and all data (purple). For each curve, we mark the SED peak with an empty circle of matching color. Lower panel: Results of the SED peak localization based on data from strictly simultaneous Swift and NuSTAR orbits. The colored data points show ν syn.peak and (νFν) syn.peak, i.e., the frequency of the SED peak and the flux at the peak. The assumption of the log-parabolic model connecting the UV/optical and X-ray data (purple empty circles) reveals a proportionality between log(νFν) syn.peak and logνsyn.peak; the dashed black line shows a linear fit best describing that relation. The other method (using only X-ray data) does not show a similar relation. In comparison with the observations published previously, shown here with different hatched grey regions, in 2013 January–March we observed a state in which the peak occurred at atypically low energy and high flux.