Yeah.. Some Stalker reported a strange glow on the dredger at night - it's weird, even for the Zone. Go there and check it out. Just be careful and remember! The place is heavily irradiated, so take antirads with you. Don't be careless.
3000 RU and Cache Coordinates.
The artifact is more or less useless, as all it does is add large amounts of radiation with no benefits, so stealing it is not recommended. The quest has an optional fighting part in it.