seems a little early to say on this one. my understanding is that their FOV was incredible small and they picked up a couple of signals with very little searching. If this turns out to be more than a data anomaly, this would suggest that either these researchers were unbelievably lucky or there are thousands of these objects waiting to be discovered ... until further data i would err on the side of caution.
The data on the 445~GHz line was strong but the other data is problematic. So will have to wait until more data is collected, then work out where about it is coming from.