1. Prospects in space-based Gamma-Ray Astronomy for Europe --- Objective of the meeting Jürgen Knödlseder Centre d’Etude Spatiale des Rayonnements, Toulouse, France

2. Cosmic Vision 2020 Definition of the ESA program for the period 2015-2025 Definition of the ESA program for the period 2015-2025 « … fix on the future science targets of our space community … » « … fix on the future science targets of our space community … » « … set the agenda for key areas of necessary technological development … » « … set the agenda for key areas of necessary technological development … » Past exercises : 1984/5 (Horizon 2000) & 1994/5 (Cosmic Vision 2004-2014) Past exercises : 1984/5 (Horizon 2000) & 1994/5 (Cosmic Vision 2004-2014)

3. Cosmic Vision 2020 Calendar - april 2004 :call for themes for Cosmic Vision 2020 - 1st june 2004 :deadline, ~ 150 proposals received - summer 2004 :definition of themes for Cosmic Vision - 15-16 september 2004 :Cosmic Vision workshop, UNESCO, Paris - 19-21 april 2005 :ESLAB Symposium, ESTEC, Noordwijk - summer 2005 :final report - end of 2005 (?) :first call for mission proposals Calendar - april 2004 :call for themes for Cosmic Vision 2020 - 1st june 2004 :deadline, ~ 150 proposals received - summer 2004 :definition of themes for Cosmic Vision - 15-16 september 2004 :Cosmic Vision workshop, UNESCO, Paris - 19-21 april 2005 :ESLAB Symposium, ESTEC, Noordwijk - summer 2005 :final report - end of 2005 (?) :first call for mission proposals Cosmic Vision 2020 themes AWGOther worlds and life in the universe The early Universe The evolving violent universe FPAGToward quantum gravity Beyond the standard model The gravitational wave universe SSWGFrom the Sun to the Earth and beyond Tracing the origin of the solar system Life and habitability in the solar system and beyond Cosmic Vision 2020 themes AWGOther worlds and life in the universe The early Universe The evolving violent universe FPAGToward quantum gravity Beyond the standard model The gravitational wave universe SSWGFrom the Sun to the Earth and beyond Tracing the origin of the solar system Life and habitability in the solar system and beyond

4. Cosmic Vision 2020 Hard X and Gamma-ray Polarization : the ultimate dimension (E. Caroli) Hard X and Gamma-ray Polarization : the ultimate dimension (E. Caroli) MeV Gamma-Ray Science (R. Diehl) MeV Gamma-Ray Science (R. Diehl) Exploring the hard X-/gamma-ray continuum sky at unprecedented sensitivty (F. Frontera) Exploring the hard X-/gamma-ray continuum sky at unprecedented sensitivty (F. Frontera) Nuclear astrophysics - Gamma-ray Spectroscopy in the MeV Domain (J. Knödlseder) Nuclear astrophysics - Gamma-ray Spectroscopy in the MeV Domain (J. Knödlseder) Probing the high energy universe (F. Lebrun) Probing the high energy universe (F. Lebrun) Gamma Ray Burst polarization (N. Produit) Gamma Ray Burst polarization (N. Produit) Unveiling the High Energy Obscured Universe : hunting collapsed objects physics (P. Ubertini) Unveiling the High Energy Obscured Universe : hunting collapsed objects physics (P. Ubertini) The input of the gamma-ray community

5. Cosmic Vision Workshop Presentation of the 9 themes Presentation of the 9 themes Darwin and XEUS emerge as future « cornerstone-like » missions for astronomy within Cosmic Vision 2020 Darwin and XEUS emerge as future « cornerstone-like » missions for astronomy within Cosmic Vision 2020 The Evolving Violent Universe : subjects (C. Done presentation) - fundamental interactions : gravity (e.g. BH) - fundamental interactions : ultradense matter (e.g. NS) - black holes at high z - supernovae and GRBs - nucleosynthesis and life cycles of matter The Evolving Violent Universe : subjects (C. Done presentation) - fundamental interactions : gravity (e.g. BH) - fundamental interactions : ultradense matter (e.g. NS) - black holes at high z - supernovae and GRBs - nucleosynthesis and life cycles of matter Requirements of next generation X-ray observatory (C. Done) - large area (10 m 2 ) - broad bandpass (0.1 - 100 keV) - high spatial resolution (2-5 arcsec) - high spectral resolution (1-2 eV) - fast detectors (µs) - polarimetry Requirements of next generation X-ray observatory (C. Done) - large area (10 m 2 ) - broad bandpass (0.1 - 100 keV) - high spatial resolution (2-5 arcsec) - high spectral resolution (1-2 eV) - fast detectors (µs) - polarimetry 15-16 september 2004 (UNESCO, Paris)

6. Cosmic Vision Workshop The high-energy roadmap - the AWG vision Only X-ray observatory in view ! ?

7. Cosmic Vision 2020 and gamma-rays Paris Workshop So far, gamma-ray astronomy is almost absent in Cosmic Vision 2020 - science (C. Done presentation) : « … MeV lines from supernova remnants … » (i.e. nucleosynthesis) - technology (A. Peacock presentation) : « … gamma-ray imager … » (i.e. Laue diffraction lens, L2) So far, gamma-ray astronomy is almost absent in Cosmic Vision 2020 - science (C. Done presentation) : « … MeV lines from supernova remnants … » (i.e. nucleosynthesis) - technology (A. Peacock presentation) : « … gamma-ray imager … » (i.e. Laue diffraction lens, L2) Too many themes ? Too many missions ? Coordination ? Too many themes ? Too many missions ? Coordination ? ESLAB Symposium ESA agreed to give a slot to the European gamma-ray community to present their scientific prospects ESA agreed to give a slot to the European gamma-ray community to present their scientific prospects The ball is now in our field … let’s play it well !!! The ball is now in our field … let’s play it well !!!

8. ESLAB Symposium Fundamental Physics from Space - space as laboratory for fundamental physics - pioneering gravitational wave astronomy with ESA Fundamental Physics from Space - space as laboratory for fundamental physics - pioneering gravitational wave astronomy with ESA Space Astronomy (1) - other worlds and life in the Universe - the formation of planets, stars, and galaxies Space Astronomy (1) - other worlds and life in the Universe - the formation of planets, stars, and galaxies Space Astronomy (2) - the energetic universe - the dark side of the universe Space Astronomy (2) - the energetic universe - the dark side of the universe Solar System (1) - our understanding of the solar system now and then - from Sun to Earth and beyond : the plasma universe Solar System (1) - our understanding of the solar system now and then - from Sun to Earth and beyond : the plasma universe Solar System (2) - tracing the origin of the solar system - life and habitability in the solar system and beyond Solar System (2) - tracing the origin of the solar system - life and habitability in the solar system and beyond

9. ESLAB Symposium The energetic Universe, Barcons (30 min) The energetic Universe, Barcons (30 min) At the frontier of X-ray astronomy, mapping the rotating surface of isolated neutron stars, Caraveo (20 min) At the frontier of X-ray astronomy, mapping the rotating surface of isolated neutron stars, Caraveo (20 min) Opening a new window to fundamental physics and astrophysics : X-ray polarimetry, Costa (20 min) Opening a new window to fundamental physics and astrophysics : X-ray polarimetry, Costa (20 min) Prospects in space-based gamma-ray astronomy, Knödlseder (20 min) Prospects in space-based gamma-ray astronomy, Knödlseder (20 min) The Energetic Universe

10. The objectives for today Workout the scientific key questions of our field Convert these scientific key questions into a mission philosophie Science objectives - The Comptonised Universe (A. Zdziarski) - Nuclear Astrophysics (R. Diehl) - Cosmic accelerators (G. Kanbach) Science objectives - The Comptonised Universe (A. Zdziarski) - Nuclear Astrophysics (R. Diehl) - Cosmic accelerators (G. Kanbach) Mission concepts - Coded mask telescope for gamma-rays (P. Ubertini) - Polarisation measurements (E. Caroli) - Laue lens for hard X-rays (F. Frontera) - Laue lens for gamma-rays (P. von Ballmoos) - Compton-pair telescope (G. Kanbach) Mission concepts - Coded mask telescope for gamma-rays (P. Ubertini) - Polarisation measurements (E. Caroli) - Laue lens for hard X-rays (F. Frontera) - Laue lens for gamma-rays (P. von Ballmoos) - Compton-pair telescope (G. Kanbach) ESLAB symposium presentation