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A Search for Evidence of Advanced Extraterrestrial Life on Kepler Planets

A Search for Evidence of Advanced Extraterrestrial Life on Kepler Planets. Matt Lebofsky Arielle Little Ron Maddalena Geoff Marcy Jill Tarter Dan Werthimer. Jeff Cobb Paul Demorest John Ford Andrew Howard Eric Korpela Glen Langston. Andrew Siemion, University of California, Berkeley.

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A Search for Evidence of Advanced Extraterrestrial Life on Kepler Planets

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  1. A Search for Evidence of Advanced Extraterrestrial Life on Kepler Planets Matt Lebofsky Arielle Little Ron Maddalena Geoff Marcy Jill Tarter Dan Werthimer Jeff Cobb Paul Demorest John Ford Andrew Howard Eric Korpela Glen Langston Andrew Siemion, University of California, Berkeley

  2. Graphic: Wendy Stenzel / NASA

  3. Narrowband Radio Signals

  4. Broadband Radio Pulses e p e e p p e p p e e p e e p p p e

  5. Observing Plan

  6. Observing Plan 5 minute targeted observation of especially interesting KOIs:

  7. Observing Plan 5 minute targeted observation of especially interesting KOIs: ‘Traditional’ HZ: -50 C < Teq< 100 C

  8. Observing Plan 5 minute targeted observation of especially interesting KOIs: ‘Traditional’ HZ: -50 C < Teq< 100 C Ncandidates > 4

  9. Observing Plan 5 minute targeted observation of especially interesting KOIs: ‘Traditional’ HZ: -50 C < Teq< 100 C Ncandidates > 4 Small, long period P > 50d && Rp < 3 RE

  10. Observing Plan 11 hour raster scan of the entire Kepler field. 5 seconds per 10’ beam

  11. Radio SETI

  12. H2O O2 Galactic Synchrotron Background Ionospheric Reflection

  13. 18 cm hyperfine OH 21 cm hyperfine H “Water Hole”

  14. Kepler SETI Band 16 to 27 cm 1.1 to 1.9 GHz

  15. Green Bank, West Virginia

  16. Single Dish Radio Astronomy Incoming Radiation Processing Analog / Digital Conversion Prime Focus Receiver / Amplifier Receiver

  17. Green Bank Ultimate Pulsar Machine (GUPPI)

  18. Green Bank Ultimate Pulsar Machine (GUPPI) 8 bit sampling ➡ 2 bit quantization Raw ‘baseband’ recording 800 MHz bandwidth, 2 polarizations ~ 1 gigabyte/second to disk

  19. Narrowband Signals Fast Fourier Transform Dynamic Spectrum FREQUENCY TIME

  20. Narrowband Signals POWER FREQUENCY

  21. Broadband Pulses FREQUENCY (MHz) Assuming a model of free electron density in the ISM, we can infer a distance of ~2000 pc. TIME (mS)

  22. Broadband Pulses Dedispersion FREQUENCY (MHz) Thresholding

  23. What could we detect?

  24. What could we detect? Broadband Pulses Narrowband Signals

  25. What could we detect? Broadband Pulses Narrowband Signals

  26. What could we detect? at 10σ: Broadband Pulses ~1 ly Narrowband Signals

  27. What could we detect? at 10σ: Broadband Pulses ~1 ly Narrowband Signals ~1650 ly

  28. What could we detect? at 10σ: Broadband Pulses ~1 ly Narrowband Signals ~1650 ly SEFD = 10 Jy tintegration=150s tpulse=10s

  29. Status

  30. Status Observations completed May 22, 2011 Total Data set ~50 TB

  31. Status Total Data set ~50 TB

  32. SETI@Home Status Total Data set ~50 TB AstroPulse

  33. SETI@Home Status Questions? Total Data set ~50 TB AstroPulse

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