FROM TH2F
constant
0.022701675331243194+-0.02050369222678386
chi2/ndof = 0.003567263870358989
plane
0.04713495578921534+-0.18982126111934264
invpt slope = -0.0013880065902055218+-0.014243192185448887
theta slope = -0.01763326377961604+-0.14773286636084001
chi2/ndof = 0.003326720543507009
from tgraph2D
constant
0.02643456505169173+-0.0010627804343368765
chi2/ndof = 6.664063284472436e-05
plane
0.0429524437320471+-0.00998864385730893
invpt slope = -0.0013263898630981549+-0.0007393538301812094
theta slope = -0.011597612155335557+-0.007948401004418215
chi2/ndof = 6.386215466237082e-05