Virgo - EGO

1. Virgo - EGO Francesco Fidecaro Tokyo, November 5, 2010

2. Early efforts Brillet (optics) Giazotto (suspensions) Collaboration started in 1992 LAPP Annecy EGO Cascina Firenze-Urbino Genova Napoli OCA Nice NIKHEF Amsterdam LAL Orsay LMA Lyon APC Paris – ESPCI Paris Perugia Pisa Roma La Sapienza Roma Tor Vergata Trento-Padova IM PAN Warsaw RMKI Budapest LKB Paris 18 groups About 200 authors The Virgo Collaboration

3. marionetta mirror Superattenuator performance • Excitation at top • Use Virgo sensitivity and stability • Integrate for several hours • Upper limit for TF at 32 Hz:1,7 10-12 • In some configurations a signal was found, but also along a direction perpendicular to excitation: compatible with magnetic cross talk

4. Coating facility – LMA Lyon ESPCI Paris • Dedicated investment by Virgo • Large area coating • Metrology • Corrective coating procedure

5. The Virgo interferometer (now Virgo+)

6. TCS optical layout STAC/Council June 2008 9

7. Control and DAQ Electronics package STAC/Council June 2008 10 • A huge electronics renewal is expected during the V+ shutdown • Obsolescence • Reduction of the noise • New DAQ electronics has been developed by LAPP and the deployment of it is partially already started • It affects the • Suspension control • Injection System control • Interferometer control • Global control

8. Virgo site in Cascina

9. The European Gravitational Observatory PURPOSE • The Consortium shall have as its purpose the promotion of research in the field of gravitation in Europe. • In this connection and in particular, the Consortium pursues the following objectives: • ensures the end of the construction of the antenna VIRGO, its operation, maintenance and the upgrade of the antenna as well as its exploitation; • ensures the maintenance of the related infrastructures, including a computer centre and promotes an open co-operation in R&D; • ensures the maintenance of the site; • carries out any other research in the field of gravitation of common interest of the Members; • promotes the co-operation in the field of the experimental and theoretical gravitational waves research in Europe; • promotes contacts among scientists and engineers, the dissemination of information and the provision of advanced training for young researchers.

10. EGO • 5 year renewal approved this year • Current members: CNRS, INFN participating equally to budget (ca 10 M€ / year) • Management: • EGO Council and its President • EGO Director • Board of auditors • Currently 48 staff, EGO Scientific Director, Adminstrative Head • Scientific and Technical Advisory Committee • Experts of the field or of related questions • VESF:Virgo-EGO Scientific Forum • Implementation of one of the EGO purposes • Gathers people interested in gravitational waves and their detection

11. Virgo performance

12. Noise understanding • Noise sources and coupling are well understood • Low frequency shows more structures • Noise reduction in advanced detectors achieved with proper design • Virgo+ in 2010: fused silica suspensions and higher Finesse • risk reduction for Advanced detectors

13. Virgo sensitivity progress VSR1: May 18-Sep 30 2007 4 month continuous data taking simultaneously with LIGO Analysis in progress

14. Calibration lines moved Environmental noise Good sensitivity

15. Stability • Robust interferometer • 95% Science Mode duty cycle (if no commissioning is made) • Good sensitivity • Stable horizon: 8-8.5 Mpc (1.4-1.4 Ns-Ns) - averaged (now 8-9.5 Mpc) 42-44 Mpc (10-10 BH-BH) - averaged • fluctuating with input mirror etalon effect • Low glitch rate: factor 10 lower than VSR1: < 0.1 Hz SNR >10 • Taking data since July 7th with 80% duty cycle in science mode and locks lasting days • Preparing for installation of monolithic suspensions

16. Environmental noises studies Investigations to understand the sources and the path to dark fringe  Coupling (paths) to dark fringe - diffused light from in air optical benches - diffused light related to Brewster window - beam jitter on injection bench  Sources of environmental noise: - air conditioning - electronic racks • Worked in parallel on: • reduction of coupling • reduction of environmental noise End benches Elec racks Injection bench Laser Beam jitter Brewster window DAQ room Detection suspended bench External bench

17. The global network

18. LV Agreement (I) • “All data analysis activities will be open to all members of the LSC and Virgo Collaborations, in a spirit of cooperation, open access, full disclosure and full transparency with the goal of best exploiting the full scientific potential of the data.” • Joint committees set up to coordinate data analysis, review results, run planning, and computing. The makeup of these committees decided by mutual agreement between the projects. • Joint publication of observational data whether data from Virgo, or LIGO (GEO) or both

19. External collaborations • Purpose: best possible scientific output from GW observation • Sharing of LSC and Virgo GW strain data • proprietary information from non-L-V scientists • specialized expertise for a joint project under the aegis of a LSC-Virgo working group. • may lead to a publication with the full LSC+Virgo author list plus the "external" scientist(s) involved • Part of the approved scientific program of the Collaborations • Transparent and open evaluation process. • Specific, well-defined project (scope, goal, duration, people), in written and in place befory proprietary data are exchanged • No exclusive agreements. • Current list (only signed MoUs listed by name) • SWIFT ToO 5, request for pointing • High energy neutrinos: Antarès-IceCube • Wide-Field Optical Follow-Ups: Pi-of-the-Sky, TAROT, QUEST, ROTSE, Skymapper… • EM Followup with satellites: Fermi-LAT, Fermi-GBM, RXTE, SWIFT • Radiotelescopes • Numerical relativity: numerical injection analysis • SuperNova Early Warning System • Prepare for Open Data policy

20. The Future: The Einstein Telescope (Europe)

21. ET Timeline ET Design ET Prep. phase ? ILIAS-next ? ET 2nd DS FP7 FP8 ASPERA-SAC, Apr2010 26