SRD:Ray

Ray (Su or Sp)
This form of special attack works like a ranged attack. Hitting with a ray attack requires a successful ranged touch attack roll, ignoring armor, natural armor, and shield and using the creature’s ranged attack bonus. Ray attacks have no range increment. A ray’s attack roll never takes a range penalty. The creature’s descriptive text specifies the maximum range, effects, and any applicable saving throw. Rays never allow a Reflex saving throw, but if a character’s Dexterity bonus to AC is high, it might be hard to hit her with the ray in the first place.