NGC7099 (M30) c
21 iterations.
Chebyshev coeffients a(0)T_0(u)+a(1)T_1(u)+..., where u is log (r/arcsec) mapped to [-1,1]
 a(0)=    19.258 +-  0.127
 a(1)=     5.557 +-  0.225
 a(2)=     2.000 +-  0.188
 a(3)=     0.368 +-  0.133
 a(4)=     0.176 +-  0.113
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=r
 a(0)=     5.7926
 a(1)=     0.6525
 a(2)=     1.3518
 a(3)=    -0.5603
 a(4)=     0.1953
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set