text:   accretion discs: fitting the spectral energy distribution of NGC 5548",9,"['#new_paper Check out our paper where we present a new model of the Optical/UV/X-ray spectral energy distribution of AGN, within the context of thermal reverberation. The model adopts an iterative interaction between the disc and the corona (<LINK>) 1/n <LINK>', 'In this context, part of the X-rays irradiating the accretion disc will be emitted as an X-ray reflection. The other part will be absorbed by the disc and re-emitted in the form of thermal radiation with a certain time delay. 2/n', 'We assume the presence of two coronæ, located above and below the disc, responsible of this radiation. We also assume that below a given transition radius (rtrans) all the accretion disc power is transferred to the corona. The transferred fraction is set by the BH spin. 3/n https://t.co/Ti4m5EWz1Y', ""We explored the effects of various parameter on the SED: spin, accretion rate, corona height, transferred power, inclination, etc. The model conserves the energy and the number of photons in the disc-corona system. Here's an example of the effect of the corona height 4/n https://t.co/Y0zQWOg83l"", 'Finally, we applied the model to the average broadband SED of NGC 5548.  5/n https://t.co/vwzZnWzRXy', 'We combined the results of the SED fitting to the ones from time-lag analysis (https://t.co/j3tVJZs0eB). We confirmed that the BH in NGC 5548 is rapidly spinning. The model calculates a posteriori the size of the corona for a given accretion rate, height, and X-ray spectrum 6/n https://t.co/pGwuXzPwBr', 'Final remark: this model cannot be applied to any simultaneous Optical/UV/X-ray SED. The observed optical/UV spectra are the response of the X-ray activity  hours and days before the time of the observations (depending on the time lags). 7/n', ""Final remark Cont'd:Thus, applying the model to observations that are shorter than the time delays may lead to erroneous results. n/n"", '@lmallick_astro It is indeed.. it was kind of surprising when we found out this.']",21,10,1858