  The subleading corrections to factorization theorems for soft bremsstrahlung
in nonabelian gauge theories and gravity are investigated in the case of a five
point amplitude with four scalars. Building on recent results, we write the
action of the angular momentum operators on scattering amplitudes as
derivatives with respect to the Mandelstam invariants to uncover a double copy
structure in the contribution of the soft graviton to the amplitude, both in
the leading term and the first correction. Using our approach, we study
Gribov's theorem as extended to nonabelian gauge theories and gravity by
Lipatov, and find that subleading corrections can be obtained from those to
Low's theorem by dropping the terms with derivatives with respect to the
center-of-mass energy, which are suppressed at high energies. In this case, the
emitted gravitons are not necessarily soft.
