sSFR}=-11.21^{+0.23}_{-0.55}$ in the last 50Myr, where the reported values and uncertainties are the median and 16th/84th percentiles of the posterior distributions. The model also prefers a modest internal dust extinction, $A_V=0.16\pm0.04$mag. The stellar mass reported by <span style="font-variant:small-caps;">prospector</span> is the integral of the star-formation history, and does not include losses due to stars reaching the ends of their active lives. From our model we measure a ‘living’ mass fraction of $0.58\pm0.02$.

![Archival photometry of the host galaxy, and SED fit using <span style="font-variant:small-caps;">prospector</span>. The best fit model, as well as the $1\sigma$ dispersion in model realisations, are shown. The inset shows the derived star-formation history, which is approximately flat at $1-2$yr$^{-1}$ prior to a steep drop in the last $\sim1$Gyr.[]{data-label="fig:host"}](prospector-fit.pdf){width="\columnwidth"}

In the same figure, we plot the median and $1\sigma$ uncertainty on the star-formation history versus lookback time since the Big Bang. We find a roughly constant star-formation rate of $\approx 2$yr$^{-1}$, prior to a sharp drop in the last $\approx 1.5$Gyr. A recent decline in star-formation is a common feature of TDE host galaxies, as evidenced by the over-representation of quiescent Balmer-strong galaxies (and the subset of post-starburst galaxies) among this population [@Arcavi2014; @French2016; @French2020rev]. Spectroscopy of the host 