FROM TH2F
constant
0.009854284724214587+-0.013508765822587076
chi2/ndof = 0.015076034556231894
plane
0.05789786493756397+-0.13174326191134605
invpt slope = -0.00601677778595482+-0.011106924692225115
theta slope = -0.028023314388472408+-0.11431096262210866
chi2/ndof = 0.008760824189169404
from tgraph2D
constant
0.024184059107225826+-0.0013679080073932088
chi2/ndof = 0.00011039916668402518
plane
0.04980632525300344+-0.009454683602204006
invpt slope = 0.0006111744441812449+-0.0009959499755920716
theta slope = -0.024670977394774814+-0.008425950676333165
chi2/ndof = 9.823650019665031e-05