SR5 p.312 "A signature lasts for a number of hours equal to the magical effect's Force after the effect ends."
Had a disagreement this past weekend at Origins during an SRM. The question involves phys ads and astral signatures. I was told I needed astral perception to "erase my magical signature". My question is what is creating the signature? I'm only using adept powers, no spells, no rituals and no spirits. I cited the rule above from SR5 regarding astral signatures. None of the adept powers have a Force rating.
So, am I producing a signature or not? If I am, could you point me to the sourcebook and rule?
Thanks.