This is true, but Hawking radiation has nothing to do with the observed event. Hawking radiation is incredibly weak, orders of magnitude dimmer than even the c

This is true, but Hawking radiation has nothing to do with the observed event. Hawking radiation is incredibly weak, orders of magnitude dimmer than even the cosmic microwave background, never mind visible starlight. The observed event is as the parent poster said, originating from just outside the hole's event horizon.