FROM TH2F
constant
0.023906470096245323+-0.019796700380352562
chi2/ndof = 0.004109191410267676
plane
-0.00028087765594312817+-0.1622561481151987
invpt slope = 0.0004222993656003217+-0.01291401782602548
theta slope = 0.02005907795157753+-0.14684170387677709
chi2/ndof = 0.003772143176301161
from tgraph2D
constant
0.026645184355498043+-0.0011727442372149455
chi2/ndof = 9.214704607709072e-05
plane
0.009853819640274757+-0.00899910776182713
invpt slope = 0.0012908518200648034+-0.0007277826538777767
theta slope = 0.011988439722256534+-0.008000596479501658
chi2/ndof = 8.369122443903209e-05