Will you go from "Hidden" to "Detected" if you cast Soul Trap (the Conjuration spell) on an enemy if you have the Silent Casting (Illusion) perk and are a really sneaky character? In other words, does Soul Trap automatically make you detected, or is it more like peeking at someone's inventory while pickpocketing, allowing you to remain hidden?
(Why I am wondering about this: I am doing a no-weapons playthrough on a sneaky character, but I still want to enchant clothing. I want to make sure I will not ruin my unarmed sneak attacks by casting Soul Trap on enemies.)