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

2. Harald Lück Valencia November 2006 Participants Alberto Vecchio Alberto Vecchio Arif Akhundov Arif Akhundov Eugenio Coccia Eugenio Coccia Gigs Nelemans Gigs Nelemans Harald Lück Harald Lück Piero Rapagnani Piero Rapagnani Sheila Rowan Sheila Rowan x x Lack of knowledge which intended WG members where missing. Recommend to add a LISA representative to WG

3. Harald Lück Valencia November 2006 1 st Generation Interferometer 10 2 3 -23 10 -22 10 -21 10 -20 10 -19 10 -18 Frequency [Hz] Strain /rt(Hz) LHO 4k June '06 LLO 4k June '06 LHO 2k June '06 Virgo Sept '06 GEO S5 Mar 23 `06 GEO S5 Sept. '06

4. Harald Lück Valencia November 2006 Planned Sensitivity Evolution Credit: M.Punturo LIGO 2005 AURIGA Explorer Nautilus 2005 DUAL Mo (Quantum Limit) Advanced LIGO/Virgo (2013) Third generation ITF Virgo Design GEO-HF 2010-13 Virgo+ 2008

5. Harald Lück Valencia November 2006 Image Source: V. Fafone (edited) MINI GRAIL AIGO Give description of worldwide international collaboration more room

6. Harald Lück Valencia November 2006 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. ´06´07´08´09´10´11´12´13´14´15´16´17´18´19´20´21´22 Virgo GEO LIGO LISA 3 rd Gen Virgo+ LIGO+ Advanced Virgo GEO HF Advanced LIGO DSPCP Construction Commissioning Hanford Livingston Launch Transfer data (5 - 1 0 y) data

7. Harald Lück Valencia November 2006 Discussion of the draft roadmap Recommended changes: Include multi messenger possibilities like determination of the mass of gravitons from time delay observations 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 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. 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 Emphasize that the focus of a 3rd generation observatory is GW Astronomy instead of GW Detection Give science case more room and Give science case more room and emphasize complementarity of LISA and ground based detectors. 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. 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 Update graphs and timing, incl. DS plans

8. Harald Lück Valencia November 2006 Theory Include theoretical efforts for data analysis and / or modelling sources? Include theoretical efforts for data analysis and / or modelling sources?

9. Harald Lück Valencia November 2006 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.