  In our previous paper [Phys. Rev. D 89 (2014) 124029], cited as [1], we
attempted to find Robinson-Trautman-type solutions of Einstein's equations
representing gyratonic sources (matter field in the form of an aligned null
fluid, or particles propagating with the speed of light, with an additional
internal spin). Unfortunately, by making a mistake in our calculations, we came
to the wrong conclusion that such solutions do not exist. We are now correcting
this mistake. In fact, this allows us to explicitly find a new large family of
gyratonic solutions in the Robinson-Trautman class of spacetimes in any
dimension greater than (or equal to) three. Gyratons thus exist in all
twist-free and shear-free geometries, that is both in the expanding
Robinson-Trautman and in the non-expanding Kundt classes of spacetimes. We
derive, summarize and compare explicit canonical metrics for all such
spacetimes in arbitrary dimension.
