There are very few details (and no DOI). Is it a continuous-waveform (carrier-only) ? "The signal bears no trace of modulation." What is the 'signal' to noise r

There are very few details (and no DOI). Is it a continuous-waveform (carrier-only) ? "The signal bears no trace of modulation." What is the 'signal' to noise ratio? (Was it dug out of the noise?) At what rate is the frequency 'very slightly' climbing? 'Coming from a star very close to our own?' For sure? or just from that general direction? At a 4 LY distance, given the loss in strength over that distance due to spread, the transmit power would have to be enormous. (Voyager 1 is about 10e-13 LY away, and our best scopes are needed to hear it.) If so, why invest so much energy in an un-modulated wave? On the very slim chance it's not local (harmonic bouncing off - or eminated by our space junk), some FRB's have been observed in that range, changing (much faster) in frequency. (Possibly more scarce physics.) The 'mysterious' lack of 'technology' details makes this sound like a PR 'result' for the BL project. (When Lorimer reported the first FRB, the details were there.)