FROM TH2F
constant
0.027363976601034793+-0.014795668711280857
chi2/ndof = 0.028052294548456765
plane
-0.0007919408648039746+-0.0339203488728414
invpt slope = 0.024663604586269792+-0.013945447676237465
theta slope = -0.0012179338866929396+-0.046183053134948845
chi2/ndof = 0.002873913143792462
from tgraph2D
constant
0.049586252693143866+-0.0035587883697208466
chi2/ndof = 0.0017857614268997552
plane
-0.0036823709938180243+-0.0025050012311342933
invpt slope = 0.02787566106481386+-0.000721915008844245
theta slope = -0.000998226058883668+-0.0033493268150674906
chi2/ndof = 0.0001534507906907026