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DTSTART;TZID=Australia/Sydney:20210929T150000
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DTSTAMP:20260421T132436
CREATED:20250819T102008Z
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SUMMARY:S&A Colloquium: Sofia Sheikh (Penn. State)
DESCRIPTION:The Breakthrough Listen Signal-of-Interest ‘blc1’: Analysis\, Origin\, and Lessons Learned\n\nAbstract\n\nThe aim of the search for extraterrestrial intelligence (SETI) is to find technologically-capable life beyond Earth through their technosignatures. On 2019-April-29\, the Breakthrough Listen SETI project observed Proxima Centauri with the Parkes “Murriyang” radio telescope. These data contained a narrowband signal with characteristics broadly consistent with a technosignature near 982 MHz (colloquially named ‘blc1’). In this talk\, I will present the discovery and characterization of blc1 in the context of the ubiquity of human-generated radio interference. Briefly: we find that blc1 is not an extraterrestrial technosignature\, but rather an electronically-drifting intermodulation product of local\, time-varying interferers aligned with the observing cadence. We find dozens of instances of radio interference with similar morphologies to blc1 at harmonically-related frequencies to common clock oscillators. These complex intermodulation products highlight the necessity for detailed follow-up of any signal-of-interest. I will end the talk with a discussion of the necessity of signal verification procedures\, and lessons learned from this intriguing case study. \n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-sofia-sheikh-penn-state/
CATEGORIES:Colloquia
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