FROM TH2F
constant
0.023482723479513072+-0.017026748550341333
chi2/ndof = 0.014056471145636245
plane
0.0007078321688980607+-0.03945279737076687
invpt slope = 0.02508641049722158+-0.0244140424007027
theta slope = 0.0030619260192195474+-0.053115403326213846
chi2/ndof = 0.0008163287328106945
from tgraph2D
constant
0.03213937369483592+-0.00250913611264127
chi2/ndof = 0.0006106891110494564
plane
0.0010627656928941752+-0.0015734257924293414
invpt slope = 0.02609205531135889+-0.0007894237146903561
theta slope = 0.003058660080891589+-0.0021388076055733666
chi2/ndof = 4.865181218355165e-05