The article says there are no known quasars in the area of space where the energy is seemingly from, or at least that’s my interpretation. So yeah it could be

The article says there are no known quasars in the area of space where the energy is seemingly from, or at least that’s my interpretation. So yeah it could be from a black hole, just an unknown one. Or it’s from a different region of space than we think, and our math is off.