FROM TH2F
constant
0.016706471327949737+-0.007808490445236544
chi2/ndof = 0.012246283746982741
plane
0.005614825345097137+-0.017547145029740516
invpt slope = 0.002708757488298501+-0.003436712472259236
theta slope = 0.0044982191848048254+-0.0199429564747035
chi2/ndof = 0.009171074883639553
from tgraph2D
constant
0.027695747587420258+-0.0011396518409877085
chi2/ndof = 0.0003857454765269751
plane
0.0019752130605546646+-0.0013223436854016162
invpt slope = 0.006062756121545796+-0.00023259435371226955
theta slope = 0.004544622254118338+-0.0014507292615667383
chi2/ndof = 9.54705891618967e-05