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1 st Feedback from the Gravitational-waves working group

This document provides feedback from the Gravitational-waves working group meeting in Valencia, November 2006. It discusses the participants, lack of knowledge among WG members, recommendations for adding a LISA representative, and timelines for future upgrades and 3rd generation plans. It also covers the differences in strategies between the US and Europe and efforts to cover upgrading down-times with other detectors. The document emphasizes the importance of multi-messenger possibilities, Europe's role in advanced detectors, and the focus on GW Astronomy. It suggests updates to graphs, timing, and includes theoretical efforts for data analysis and modelling sources.

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1 st Feedback from the Gravitational-waves working group

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  1. 1st Feedback from the Gravitational-waves working group Harald Lück Valencia, November 2006

  2. Participants • Alberto Vecchio • Arif Akhundov • Eugenio Coccia • Gigs Nelemans • Harald Lück • Piero Rapagnani • Sheila Rowan • x Lack of knowledge which intended WG members where missing. Recommend to add a LISA representative to WG

  3. -18 10 LHO 4k June '06 LLO 4k June '06 LHO 2k June '06 Virgo Sept '06 GEO S5 Mar 23 `06 -19 10 GEO S5 Sept. '06 -20 10 Strain /rt(Hz) -21 10 -22 10 -23 10 2 3 10 10 Frequency [Hz] 1st Generation Interferometer

  4. Planned Sensitivity Evolution LIGO 2005 AURIGA Explorer Nautilus 2005 Virgo+ 2008 Virgo Design GEO-HF 2010-13 DUAL Mo (Quantum Limit) Advanced LIGO/Virgo (2013) Third generation ITF Credit: M.Punturo

  5. Give description of worldwide international collaboration more room MINI GRAIL AIGO Image Source: V. Fafone (edited)

  6. Improve description of worldwide GW landscape, timelines for future upgrades, and 3rd generation plans.Explain differences in strategies between US and Europe?Mention efforts to cover upgrading down-times with other detectors, either interferometric or resonant detectors. Virgo+ Advanced Virgo GEO HF Hanford Advanced LIGO LIGO+ Livingston Launch Transfer data (5 - 1 0 y) DS PCP Construction Commissioning data

  7. Discussion of the draft roadmap Recommended changes: • Include multi messenger possibilities like determination of the mass of gravitons from time delay observations • Outline Europe’s role in advanced detectors not only by operating advanced Virgo and GEO-HF but also by contributing significantly to advanced LIGO • High event rate for advanced detectors guarantees detections within weeks or months. • Emphasize that the focus of a 3rd generation observatory is GW Astronomy instead of GW Detection • Give science case more room and • emphasize complementarity of LISA and ground based detectors. • Mention that a few sources might chirp from LISA frequency band into 3rd generation band within observing time. • Update graphs and timing, incl. DS plans

  8. Theory • Include theoretical efforts for data analysis and / or modelling sources?

  9. Timeline for the Design Study • The preparation of the proposal will be managed within ILIAS-N5-GWA-WG3 • WG3 will realize a skeleton version of the Design Study proposal within two months, i.e. in 2006. • Call an open meeting of WG3 to look for (new) collaborators • Distribute writing workload onto subgroups • Prepare a first draft version until end of February. • Call for Proposals closes about middle of April.

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