The information isn't helpful. If the paper wanted to make a case for this star being a candidate for the signal's origin, the paper should have at least discus

The information isn't helpful. If the paper wanted to make a case for this star being a candidate for the signal's origin, the paper should have at least discussed the expected probability of finding such a start in such a volume in the Milky Way. They found 1. Or 14. Or a lot more, if you relax a constraint that isn't motivated. The "paper" concludes that both candidate volumes() of space should be searched for exoplanets. () only one "horn" (of 2) received the signal, but they don't know which one. Hence two possible volumes of space where the signal could have originated.