I have two histograms TH1D, containing the same information about the content of the bins but each one has different error bars, one with systematic uncertainty and the other with statistical uncertainty. What I want to do is join these two histogram into only one but now with two errors bars. I see that I can do this with TGraphMultiErrors but I want to do this for TH1D. Can I do that? It is possible? If yes, how? And when I make a fit, it will considering the statistical or systematic uncertainty??
Actually, is for this two case. I want to draw but before I want to make a BlastWave fit on my spectrum, maybe considering just the systematic uncertainty if I need to choose one.
If you then draw this first and one of the others on top (histWithStatUncert->Draw("SAME")), possibly with different uncertainty “band” colors, it will show the two error “bands”.