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What is LIGO (LSC/GEO/Virgo/…)?

What is LIGO (LSC/GEO/Virgo/…)?. Virgo detector, Cascina , Italy. Gabriela Gonz ález , Louisiana State University For the LIGO Scientific Collaboration and the Virgo Collaboration. LIGO Hanford Observatory Washington, USA. LIGO Livingston Observatory, Louisiana, USA.

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What is LIGO (LSC/GEO/Virgo/…)?

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  1. What is LIGO (LSC/GEO/Virgo/…)? Virgo detector, Cascina, Italy Gabriela González, Louisiana State University For the LIGO Scientific Collaboration and the Virgo Collaboration LIGO Hanford ObservatoryWashington, USA LIGO Livingston Observatory,Louisiana, USA

  2. Gravitational waves Gravitational waves are quadrupolar distortions of distances between freely falling masses. They are produced by time-varying mass quadrupoles. +, x and averaged strain sensitivity LIGO-T970101

  3. Not a simple Michelson interferometer! Rep. Prog. Phys. 72 (2009) 076901 arXiv:0711.3041200711 LIGO: The Laser Interferometer Gravitational-Wave Observatory

  4. Seismic Noise Quantum Noise Residual gas scattering Radiation pressure "Shot" noise Wavelength & amplitude fluctuations Thermal (Brownian) Noise Interferometer Noise test mass (mirror) LASER beamsplitter photodiode

  5. (LIGO) Design Noise Limits

  6. hrms = 3 10-22 LIGO: Steady progress

  7. TAMA300 GW detector network 2002-2006 GEO-600 Hannover Germany LIGO-Hanford,WA X 2 LIGO-Livingston,LA http://www.oera.net/How2/PlanetTexs/

  8. LIGO Scientific Collaborationwww.ligo.org Hundreds (800+) of people working on technology for LIGO detectors, producing and analyzing the LIGO/GEO data. Science results NSHP/NSBP Conference

  9. GW detector network 2005-2010 LIGO-Hanford,WA X 2 GEO-600 Hannover, Germany VIRGO Cascina, Italy LIGO-Livingston,LA http://www.oera.net/How2/PlanetTexs/

  10. LSC S5 run (Nov’05-Oct’07) With a 15 Mpc average reach, we expected ~ 1 BNS coalescence every ~50 yrs  We were not lucky: data analysis did not find any detections (ligo.org), although we did have a ghost!Predicted observation rates: Class. Quantum Grav. 27 (2010) 173001 S5 (and all) papers in https://www.lsc-group.phys.uwm.edu/ppcomm/Papers.html NSHP/NSBP Conference

  11. Crab pulsar (NASA, Chandra Observatory) NASA, HEASARC ? NASA, WMAP “initial” GW network searches Find all LSC results and publications in www.ligo.org https://www.lsc-group.phys.uwm.edu/ppcomm/Papers.html

  12. Enhanced GW detector network 2007-2010 LIGO-Hanford,WA X 2 GEO-600 Hannover, Germany VIRGO Cascina, Italy LIGO-Livingston,LA http://www.oera.net/How2/PlanetTexs/

  13. 2009/10: Enhanced LIGO, Virgo++ EM partners

  14. 2005-2010: binary neutron star reach S6 S5 Nucl. Instrum. Meth. A624 (2010) 223 NSHP/NSBP Conference

  15. Observing Partners During S6/VSR2+3 Radio • Mostly (but not all) robotic wide-field optical telescopes • Mainly used for following up GRBs, surveying for supernovae and other optical transients • "Implementation and testing of the first prompt search for electromagnetic counterparts to gravitational wave transients”http://arxiv.org/abs/1109.3498 X-ray and UV/Optical

  16. “Big Dog event” http://ligo.org/news/blind-injection.php Data from a 3-detector network localized the source (very roughly) near Canis Major. Practiced a system to follow up triggers with EM telescopes/satellites. You can get the detector data and other details: http://ligo.org/science/GW100916/ NSHP/NSBP Conference

  17. GWs or glitches? H1 S6D, offline vetoes

  18. GW detector network2011-2014 GEO-600 Hannover, Germany http://www.oera.net/How2/PlanetTexs/

  19. Present: Advanced LIGO detectors Funding in place, installation already in progress, end of construction in 2015. NOW

  20. GW detector network 2015 (LIGO: 1-hr lock - ??? Mpc) LIGO-Hanford,WA X 2? GEO-600 Hannover, Germany LIGO-Livingston,LA http://www.oera.net/How2/PlanetTexs/

  21. Projected Noise Spectra Orientation-averaged detection range for binary inspirals • Factor of ~10 better amplitude sensitivity than initial detectors  Factor of ~1000 greater volume of space Advanced LIGO shown; Advanced Virgo similar Best guess: will detect dozens per year

  22. LIGO detectors: near future! Neutron Star Binaries: Initial LIGO: ~15 Mpc rate ~1/50yrs Advanced LIGO: ~ 200 Mpc “Realistic rate” ~ 40/year  Class. Quant. Grav. 27, 173001 (2010)

  23. (LIGO) Open data release plan LIGO data management plan (public) LIGO-M1000066 (dcc.ligo.org) 2011 2013 2012 2014 2015 2016 2017 2018 2019 2010 L1 H2 H1 2.5 years S6 Release 2B: Full Data SE1 SE2 SE3 SE4 SE5 SE6 Engineering Runs Release 2A: Immediate Triggers NOW Release 1: First Detections Dates are “guaranteed no earlier”

  24. GW detector network 2015+ LCGT Kamioka mine, Japan LIGO-Hanford,WA X 2? GEO-600 Hannover, Germany VIRGO Cascina, Italy LIGO-Livingston,LA LIGO-India? http://www.oera.net/How2/PlanetTexs/

  25. Other GW windows / Virgo

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