  Several hundred gamma-ray burst (GRB) redshifts have been determined to date.
One of the other important properties-besides the distance-of the GRBs is the
duration of the burst. In this paper, we analyse these two important quantities
of the phenomena. In this paper, we map the two-dimensional distribution and
explore some suspicious areas. As it is well known that the short GRBs are
closer than the others, we search for parts in the Universe where the GRB
duration is different from the others. We also analyse whether there are any
ranges in the duration where the redshifts differ. We find some suspicious
areas, however, no other significant region was found than the short GRB
region.
