FROM TH2F
constant
14.36448242266825+-0.3581261054475416
chi2/ndof = 19.272450550646006
plane
-0.24018591392267727+-0.8152303900112153
invpt slope = 6.0675704310993845+-0.34504369745322633
theta slope = 10.34341153886572+-1.2679780994774117
chi2/ndof = 15.446159131840682
from tgraph2D
constant
30.525840187772737+-4.281362858051261
chi2/ndof = 2327.918627634946
plane
-12.00696976202944+-7.6031211012129125
invpt slope = 20.298917752278342+-2.6393030273263305
theta slope = 9.175209303777002+-11.46418373893653
chi2/ndof = 1520.3206261836824