Integrated flux (10⁻²²) W m⁻²) of the blue (filled circles) and tangential (filled inverted triangles) components of OH 39.7 + 1.5 as a function of stellar phase from the beginning of 1990 to the end of 1994, as listed in Table 1 of EWWB. The flux scale for the blue component is divided by 3: all integrated fluxes less than 10 are upper limits.