FROM TH2F
constant
11.044313561534524+-0.5321536687108975
chi2/ndof = 85.21462007314146
plane
81.02059097160989+-8.503023473999205
invpt slope = 15.825073567610223+-1.4184178472479585
theta slope = -77.89867095468273+-6.473989694849504
chi2/ndof = 66.90839731759276
from tgraph2D
constant
89.37346105381081+-7.49152609567426
chi2/ndof = 2413.2874228594205
plane
-42.02430107804065+-59.33355515192157
invpt slope = 14.154355668698159+-6.871276836280709
theta slope = 109.81421281615829+-55.7622513065336
chi2/ndof = 2178.478070972406