This is a heroic 4
that you get when doing the story mission for macrobinoculars, chasing 'The Spectre'. You get this after scanning for signals at several different planets. It's set on Nar Shaddaa.
I've been stuck on this heroic for over a month now because there don't seem to be any people who've either reached this point or are interested. I've often asked at the fleet and asked, but nobody ever responds.
I've tried it with one other person and our companions, but the mobs are quite tough.
If anyone else has reached that stage, please contact me in game on either of my primary characters, Sagaros (commando) or San'aa (guardian).