This file contains the 75 x 75 inverse covariance matrix for 
$d\sigma(e^+e^- \to \pi^+\pi^-\gamma)/dM^2_{\pi\pi}$ with 
$0^o<\theta_{\pi}<180^o$ and at least one photon with 
$50^o<\theta_{\gamma}<130^o$ and $E_\gamma$ > 20 MeV

To open the inverse cov matrix, just use the following FORTRAN code:

      open(UNIT=49,FILE=
     $'./icovsppg10.dat',
     $  STATUS='OLD')
       DO I=1,75
          DO J=1,75
             read(49,*) a(i,j)
          ENDDO
       ENDDO
      close(49)