FROM TH2F
constant
32.74519660316975+-0.6791170384626961
chi2/ndof = 21.384348602070485
plane
47.69401923878141+-4.873322977313564
invpt slope = -5.296157957831558+-0.43646506992614165
theta slope = -1.0184045722658581+-4.127207992281821
chi2/ndof = 19.684751119741883
from tgraph2D
constant
52.93756800194295+-4.080216255825754
chi2/ndof = 1281.908681356871
plane
71.3710913588653+-23.99401006514364
invpt slope = 7.694359279347865+-2.8602904650036054
theta slope = -28.190596969044222+-19.932719580115965
chi2/ndof = 1184.0017711015082