As far as my research has taken me, none seems to know who created this Warp Gate.
But would anyone have any good ideas as to whom it could be? Personally I find it to look fairly eldar'ish, but think it is stated somewhere that it is not.
My main reason for asking, is that our campaign is running a bit differently, and I would like my players to become involved in when the gate was actually activated, while on a recon mission of it. My first thought was to have some elders come poking around (with a plot still in progress, but maybe to use it to escape the great devourer, the chaos mini-eye, or something else - or to lure the Imperium to this sector to help starve of some of these enemies?!)
But now I am not so sure if that is the best idea, if it is not Eldar technology (and since they can most likely just relocate anyways).
Anyone have any great ideas I can use?