FROM TH2F
constant
15.913574453660644+-0.5532000337981713
chi2/ndof = 52.03052334697788
plane
65.85360951931277+-3.008003790616886
invpt slope = -17.996679141005195+-0.730526802256159
theta slope = -15.257245474828053+-2.6037621190645033
chi2/ndof = 41.45983903196903
from tgraph2D
constant
66.49027658026841+-5.639400518091892
chi2/ndof = 1876.3674519460337
plane
88.97254406616037+-27.695555019664155
invpt slope = 1.496845900796992+-6.8227693724021785
theta slope = -26.103443541779+-26.750187138678623
chi2/ndof = 1906.3208795062596