A Search for Technosignatures Around 11,680 Stars with the Green Bank Telescope at 1.15-1.73 GHz
Green Bank Telescope
Narrowband
DOI:
10.48550/arxiv.2308.02712
Publication Date:
2023-01-01
AUTHORS (81)
ABSTRACT
We conducted a search for narrowband radio signals over four observing sessions in 2020-2023 with the L-band receiver (1.15-1.73 GHz) of 100 m diameter Green Bank Telescope. pointed telescope directions 62 TESS Objects Interest, capturing emissions from total ~11,680 stars and planetary systems ~9 arcminute beam telescope. All detections were either automatically rejected or visually inspected confirmed to be anthropogenic nature. In this work, we also quantified end-to-end efficiency SETI pipelines signal injection recovery analysis. The UCLA pipeline recovers 94.0% injected usable frequency range 98.7% injections when regions dense RFI are excluded. another that uses incoherent sums 51 consecutive spectra, rate is ~15 times smaller at ~6%. affects calculations transmitter prevalence volume. Accordingly, developed an improved Drake Figure Merit formalism place upper limits on take duty cycle into account. Based our observations, can state 95% confidence level fewer than 6.6% within pc host detectable (EIRP > 1e13 W). For 20,000 ly, fraction transmitters 5e16 W) most 3e-4. Finally, showed natively detects detected AI techniques by Ma et al. (2023).
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