The following files are slightly reformatted data from KKM in
'reflectivities2010-10-28.zip' that contains files group1 through group10:

group01_121026.dat group02_121026.dat group03_121026.dat
group04_121026.dat group05_121026.dat group06_121026.dat
group07_121026.dat group08_121026.dat group09_121026.dat
group10_121026.dat

These files contain effective area as calculated by KKM using
'ctrace' with the above files as input reflectivities.
No LVDT and No scattering:

NuStar_Area_KKM_oaa0_121026.dat NuStar_Area_KKM_oaa2_121026.dat
NuStar_Area_KKM_oaa3_121026.dat NuStar_Area_KKM_oaa6_121026.dat

These files contain effective area as calculated by NJW using MT_RAYOR with
the group01_... files above as input reflectivities. No LVDT and No scattering:

eff_area_NJW_0.0_121026.fits eff_area_NJW_1.0_121026.fits
eff_area_NJW_2.0_121026.fits eff_area_NJW_3.0_121026.fits
eff_area_NJW_4.0_121026.fits eff_area_NJW_5.0_121026.fits
eff_area_NJW_6.0_121026.fits

A simple way of finding the onaxis effective area is to find each mirror
shell's contribution from its front area times the reflectivity squared
times the fraction of free opening. This is done here for an energy of
30.4 keV:

simple_eff_area_121030.dat