I've fit particle-level Pythia8 spectra with power laws to estimate some different priors for our unfolding scheme.  The other bins of EtTrg for pi0 and gamma-direct triggers can be found here:

https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-09212018-pythia-fitting-pi0-and-gamma-direct-spectra-power-laws
https://drupal.star.bnl.gov/STAR/blog/dmawxc/update-08142019-pythia-fitting-pi0-spectra-power-laws-ettrg-15-20-gev

And here's the fit for the 15 - 20 GeV gamma spectrum: