Is Anybody Out There? Breakthrough Listen and SETI@home Search for - - PowerPoint PPT Presentation

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Is Anybody Out There? Breakthrough Listen and SETI@home Search for - - PowerPoint PPT Presentation

May 12, 2023 202 likes •1.04k views

Is Anybody Out There? Breakthrough Listen and SETI@home Search for ET Dan Werthimer University of California, Berkeley http://seti.berkeley.edu Drake Equation N=R f s f p n e f l f i f c L N = number of communicating civilizations in our

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Is Anybody Out There?

Breakthrough Listen and SETI@home Search for ET

Dan Werthimer University of California, Berkeley

http://seti.berkeley.edu

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Drake Equation

N=R fs fp ne fl fi fc L

N = number of communicating civilizations in our galaxy

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Jupiter’s Moon: Europa

Sub-Crust Ocean

.

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SETI before CASPER

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Porno in space:

FUNDED!

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Signal Types

  • 1. Artifact (radio, radar, ~TV, ????)
  • 2. Deliberate (easy to decode, pictures,

language lessons)

First civilization we contact is likely to be a billion years ahead of us. (ray norris, 2002)

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First Radio SETI

  • Nikola Tesla (1899)

– Announces “coherent signals from Mars”

  • Guglielmo Marconi (1920)

– Strange signals from ET

  • Frank Drake (1960)

– Project Ozma – one channel, 1420-1420.4 MHz

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Collaborators

BERKELEY SETI RESEARCH CENTER

BERKEL KELEY EY ASTRONOMY DEPARTMEN ENT
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Berkeley SETI Group

Zuhra Abdurashidova, David Anderson, Jeff Cobb, Steve Croft, David DeBoer, Matt Dexter, Emilio Enriquez, Walt Fitelson, Griffin Foster, Vishal Gajjar, Greg Hellbourg, Jack Hickish, Howard Isaacson, Eric Korpela, Matt Lebofsky, Dave MacMahon, Danny Price, Chris Schodt, Isaac Shivvers, Andrew Siemion, Nate Tellis, Ed Wishnow, Dan Werthimer

Breakthrough Foundation, NSF , NASA, Donors Keysight, Intel, Seagate, Xilinx

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Berkeley SETI Research Center Experiments

  • Radio SETI

– SERENDIP VI (Arecibo) – SERENDIP VI (Greenbank) – LOFAR SETI – GBT Targeted Time Domain SETI – SETI@home – Astropulse

  • Optical/IR SETI

– Spectral Search for Laser Lines from KOI – Searches for ET artifacts in light curves – IR SETI with the Infrared Spatial Interferometer – IR photodetector system

  • Panchromatic SETI
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Technosignatures…

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Microwave Window

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Searching Across the Electromagnetic Spectrum

Using multiple telescopes, we can search across the electromagnetic spectrum for indicators of advanced technology.

Low Frequency Array Arecibo Green Bank Telescope Infrared Spatial Interferometer Optical Telescopes

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NAIC Arecibo Observatory, Puerto Rico

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Breakthough Prize Foundation “LISTEN” SETI Project

  • $100M over 10 years
  • Starting with Green Bank and Parkes Radio Telescopes
  • Lick Observatory (optical SETI)
  • 1,000,000 stars; 1000 galaxies; galactic plane; all sky
  • New instrumentation: 10 GHz bandwidth (20 billion channels)
  • SETI@home participants will analyze interesting parts of data
  • Open source data, hardware, software, gpuware, gateware
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The Breakthrough Listen Initiative: Telescopes

Automated Planet Finder (Lick Observatory)

  • Search for extremely narrow emission lines from

artificial lasers

  • Extremely high resolution “Levy Spectrometer”

374 - 950 nm, λ/Δλ= 105

Green Bank Telescope (Green Bank, WV)

  • Radio search focusing on targeted and raster
  • bservations
  • Nearly continuous frequency coverage 300 MHz - 100

GHz

  • Flexible IF system can deliver up to 10 GHz dual-pol

analog bandwidth

Parkes Telescope (New South Wales, Australia)

  • Radio search focusing on surveys
  • Southern hemisphere location gives great access to

galactic plane

  • Multi-beam receiver allows very efficient L-band (1.2 - 1.5

GHz) sky surveys

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Meerkat Commensal SETI – 64 beams

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The Breakthrough Listen Initiative: http://breakthroughinitiatives.org 1 Million Stars 1000 Galaxies

1 day of Breakthrough Listen = 1 year of any previous search

10 years - 108 dollars

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LISTEN SETI Data Rates

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Listen Data Products (Open Data)

  • Candidate Signals: raw data [voltage(t)]
  • Voltage Surveys (Parkes Galactic Plane survey)
  • SETI@home raw data (mostly Southern Sky Survey)
  • High Spectral Resolution Data

(SETI, Galactic Structure and Evolution)

  • High Time Cadence Spectral Data

(Pulsars,Fast Radio Bursts,Primordial Black Holes,Transients,SETI)

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Public Data Access and Outreach

  • Web Site, GitHub, Facebook, Twitter, YouTube
  • Data Analysis Tutorials and Example Software
  • APF, GBT, Parkes, example data sets

(Voyager 1…)

  • Data Analysis Challenges and Projects
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Power Spectrum Auto Correlation

An example… Binary Phase Shift Keying (BPSK)

BROADBAND EMISSION

✴ Modern radio

communication largely broadband

✴ Wide bandwidths permit

rich information content

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High performance data storage silo Arecibo Observatory UC Berkeley Space Sciences Lab Public Volunteers

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SETI@Home

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SETI@home Breakthrough Pipeline

Example Cluster

On On Off Off Off On

Cluster

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Public Participation Scientific Supercomputing

aka “Distributed Computing” aka “edge resource aggregation”

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Projects

  • Astronomy

– SETI@home (Berkeley) – Astropulse (Berkeley) – Einstein@home: gravitational pulsar search (Caltech,…) – PlanetQuest (SETI Institute) – Stardust@home (Berkeley, Univ. Washinton,…)

  • Earth science

– Climateprediction.net (Oxford)

  • Biology/Medicine

– Folding@home, Predictor@home (Stanford, Scripts) – FightAIDSathome: virtual drug discovery

  • Physics

– LHC@home (Cern)

  • Other

– Web indexing/search – Internet Resource mapping (UC Berkeley)

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Rosetta Screensaver

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Thinking@Home

Stardust@home...

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Stardust January 2009

19

Stardust (NASA)

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Citizen Science Projects

  • SETI@home and Astropulse

(UC Berkeley)

  • Stardust@home

(UC Berkeley)

  • SetiQuest

(Seti Institute)

  • Galaxy Zoo (Galaxy Classification)
  • Audubon Society's Christmas Bird Count (1900)
  • Community Collaborative Rain, Hail & Snow Monitor Network
  • Clickworkers

(mars crater identficiation - NASA)

  • Ebird, NestWatch, FeederWatch, Urban Birds (Cornell Univ.)
  • ParkScan (monitor San Francisco Parks)
  • ScienceForCitizens.net
  • ENERGY@home
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Infrared Spatial Interferometer heterodyne detection at 27 THz w/ CO2 laser LOs

  • Mt. Wilson, CA

3 telescope system 4,8,12m early 2006 Currently ~35m triangular baselines

2008 @ Mt. Wilson

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Simultaneous Digital Backends

Piggyback, Commensal, Sky Surveys

Signal Splitter

Pulsar Spectrometer

Galactic Spectrometer Extra Galactic Spectrometer SETI Spectrometer Baseband Data Recorder

Analog Power Splitters (ARECIBO Multibeam)

  • r

Digital Data Splitter (FAST Multibeam)

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SETI and FRB search at Arecibo/GBT

SERENDIP VI and ALFABURST

Lorimer, Chennamangalam, Armour, Karastergiou, Golpayegani, Rajwade, Werthimer,….

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Serendip VI & ALFABURST UCB, WVU, Oxford, Arecibo, GBT

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FAST 500 meter telescope

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Five-hundred-meter Aperture Spherical radio Telescope (FAST)

FAST (2016.5) 500 m

100 meters

GBT 100 m Arecibo 300 m

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HERA Array 352 x 14 meter dishes

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All Sky All the Time (low duty cycle search)

  • 1973 Troitsky et al, Sporadic Radiation Resulting

from Technological Activity of Extraterrestrial Civilization (Baku, USSR) (cross correlation of several dipoles)

  • Phase Array Feeds on the Ground

(Mike Garret, Ron Ekers)

  • IR/OSETI All Sky Workshop - 2016
  • Radio All Workshop – 2017 ??
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PANORAMIC-SETI: Pulsed All-sky Near-infrared Optical SETI

PANO-SETI

Shelley Wright, Paul Horowitz, Jerome Maire, Frank Drake, Eliot Gillum, Andrew Howard, Geoffrey Marcy, Andrew Siemion, Remington Stone, Richard Treffers, Dan Werthimer

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Avalanche Photo Diode Arrays visible, near-IR

Near-infrared (900 – 1700 nm) Optical Multi-pixel photon counting (MPPC) Detectors by Hamamatsu (400-1000) - 3mm

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Phased Array Feed – 64 beams

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All Sky All the Time Radio SETI

(7 PAF’s on the ground – Ron Ekers)

OSS - Ron Ekers 71 |

4m

  • 94 dual pol elements/PAF
  • Total elements 1316
  • 10 sqm area
  • 3 degree beams
  • FoV 100x100 degrees
  • Form 1000 simultaneous

beams

  • Sited in the worlds most

RFI quiet site

  • Exquisite rfi monitor!
  • Provide copy of rfi signal for

adaptive cancelling

  • Track satellites across sky
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Embrace: 20K/10K elements, 160m^2, 500-1500 MHz

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HERA Array 352 x 14 meter dishes

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Moores Law – Instruments using FPGA’s: 2X per year (1,000,000 over 20 years)

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Use Sun As Gravitational Lens

Place camera at focus 100 billion km Read License Plates on Extrasolar Planet

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Summary and Conclusion No ET so far Still working on it

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SETI HAIKU

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Searching for life Answers are revealed About ourselves

Paula Cook, Duke University

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One million earthlings Bounded by optimism Leave their PC’s on

Dan Seidner

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Casper Commandments

Thou Shalt Share thy Knowledge Thou Shalt Help thy Neighbor Casperite Thou Shalt Covet thy Ethernet to Connect Everything Switches are Free (negative?)