SETI Scientists Report Discovery of More Fast Radio Bursts

Using a "recently refurbished" telescope array, SETI scientists performed 541 hours of additional observations - and found 35 new "Fast Radio Bursts" (or FRBs). SciTechDaily reports: All 35 FRBs were found in the lower part of the frequency spectrum, each with its unique energy signature. "This work is exciting because it provides both confirmation of known FRB properties and the discovery of some new ones," said the SETI Institute's Dr. Sofia Sheikh, NSF MPS-Ascend Postdoctoral Fellow and lead author. "We're narrowing down the source of FRBs, for example, to extreme objects such as magnetars, but no existing model can explain all of the properties that have been observed so far. It has been wonderful to be part of the first FRB study done with the Allen Telescope Array - this work proves that new telescopes with unique capabilities, like the Allen Telescope Array, can provide a new angle on outstanding mysteries in FRB science." The detailed findings, recently published in the journal Monthly Notices of the Royal Astronomical Society (MNRAS), showcase the intriguing behaviors of FRBs. These mysterious signals exhibit downward frequency drifting, a connection between their bandwidth and center frequency, and changes in burst duration over time. The team also observed something that had never been reported before: there was a noticeable drop in the center frequency of bursts over the two months of observation, revealing an unexpected cosmic slide-whistle... No clear pattern was found, highlighting the unpredictability of these celestial phenomena. SETI says its Allen Telescope Array (or ATA) was custom-built for SETI searches, "thanks to the interest and benevolence of many donors, including technologists Paul Allen (co-founder of Microsoft) and Nathan Myhrvold (former Chief Technology Officer for Microsoft)."The Allen Telescope Array offers SETI scientists access to an instrument seven days a week, and permits the search of several different targets (usually nearby star systems) simultaneously. This can result in a speed-up of SETI searches by a factor of at least 100.

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