CDC run 2016 drift time fits
From GlueXWiki
TF1 *f = new TF1("f","[0]*(1+[1]*exp(([3]-x)/[2])+[7]*exp(([3]-x)/[8]))/((1+exp(([3]-x)/[5]))*(1+exp((x-[4])/[6])))",400,1400); f->SetParameter(0,20); //overall height f->SetParameter(1,20); //amplitude of first exp contrib to peak f->SetParameter(2,10); //first exp fall-off f->SetParameter(3,550); //t0 f->SetParameter(4,1200); //tmax f->SetParameter(5,2); //slope up of t0 edge f->SetParameter(6,5); //slope down of tmax edge f->SetParameter(7,3); //amplitude of first second contrib to peak f->SetParameter(8,100); //second exp fall-off