At that time the search could not discover the radio counterpart of Her X-1 if its radio emission were analogous to its 36 - day periodic X-ray behavior .
There was no compelling astrophysical reason for the two fluxes to be correlated .
At that time the search could not discover the radio counterpart of Her X-1 if its radio emission were analogous to its 36 - day periodic X-ray behavior , although there was no compelling astrophysical reason for the two fluxes to be correlated .