Pool Strike, Arcing
Benefit: The magus can expend 1 additional point from his arcane pool when using the pool strike arcana. If his attack hits, the magus can target a number of enemies within 15 feet equal to his Intelligence modifier (minimum 0) with a ranged touch attack as a free action. Those struck take the same energy damage as the primary target of the pool strike, including increased damage on a critical hit.
Supernatural abilities
By RAW
" Supernatural abilities are magical and go away in an antimagic field but are not subject to spell resistance, counterspells, or to being dispelled by dispel magic. Using a supernatural ability is a standard action unless noted otherwise. Supernatural abilities may have a use limit or be usable at will, just like spell-like abilities. However, supernatural abilities do not provoke attacks of opportunity and never require Concentration checks.
Does the ranged touch attack by "pool strike, Arcing" provokes attack of opportunity, or not, from enemies in range?