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ATHENA COMMUNITY NEWSLETTER #3 June 2017 Contents ATHENA COMMUNITY NEWSLETTER #3 June 2017 Contents Welcome.......................................................................................... 1 Athena Team Membership News ...................................................... 1 Athena Phase A Progress .................................................................... 2 News from the Instruments ................................................................. 3 News from the WFI ......................................................................... 3 News from X-IFU ............................................................................ 4 AREMBES and the Athena background ................................................. 5 The ESO-Athena Synergy Exercise ends with the publication of the ESO-Athena Synergy White Paper ...................................................... 6 How are winds generated around stellar-mass black holes and neutron stars? ................................................................................. 7 Athena instrument background ........................................................... 8 Athena Community People ................................................................. 9 Conferences ................................................................................... 10 Athena in Conferences (mid-July - December 2017) ........................... 10 Coming conferences of interest ...................................................... 10 Edited by Athena Community Office: F.J. Carrera, M.T. Ceballos, S. Martínez-Núñez, M.P. Monterde Instituto de Física de Cantabria (CSIC-UC) Avda Los Castros s/n 39005 Santander (Spain) http://www.the-athena-x-ray-observatory.eu/ @athena2028 The Athena X-ray Observatory Athena X-ray Observatory Editorial Board: L. Piro & R. Smith *Front Cover image credits: Background image: WFI/SIXTE simulation of 700ks of a blank field (Credit: G. Lanzuisi). Preliminary spectra of the background in the X-IFU instrument (Credit: S. Lotti and S. Molendi; top left). Schematics of the steps followed by the soft protons through the telescope (Credit: S. Lotti et al., Exp Astron (2017); top right). Preliminary spectra of the background in the WFI instrument (Credit: A. von Kienlin and the WFI team; bottom left). Schematic view of particle background in X-IFU FPA (Credit: SRON; bottom centre). Composition: ACO. Welcome K. Nandra (ASST Lead Scientist) on behalf of the Athena Science Study Team (ASST) Welcome to the third installment of the Athena of the ESO-Athena Synergy Team (EAST), co- Community Newsletter. ordinated by its infectiously enthusiastic chair This issue comes at an exciting but challenging Paolo Padovani. As the EAST report shows, the phase for the project. The mission is progressing prospect of Europe’s great space- and ground- through an intensive Phase A study, with a detailed based observatories working together in the late examination and consideration of all the technical 2020s is truly mouthwatering. issues and programmatic constraints. The coming Our scientific and technical nuggets this time six months should see a consolidation of this concentrate respectively on black hole winds, process, resulting in a sound mission baseline and the Athena background, the latter also being that can be taken forward through Phase A and the subject of a dedicated article on the AREMBES beyond. You will find a more detailed report on activity. this in the newsletter, as well as progress reports We are delighted to be able to share with you from the two Athena instruments. the profiles of three key Athena scientists, Anne Our last newsletter included the most recent Decourchelle, Luigi Piro and Thomas Reiprich. solicitation for new members of the Athena Last, but certainly not least, in this issue we working groups. This has now been completed, bid farewell to Xavier Barcons, who is leaving and it is a pleasure to be able to welcome 38 new the Athena team after two decades of service members to our team. The energy and support in defining and motivating the next generation of our community is one of Athena’s greatest European X-ray Observatory. He is already sorely strengths. missed, but we wish Xavier all the best in his new Another great strength of Athena is as an role as ESO Director-General. observatory, working together with other facilities across the wavebands to provide new insights We hope you enjoy this newsletter and as ever into the Universe. In this respect we are excited are grateful to the Athena Community Office for to report on the recent publication of the report their efforts in putting it together. Athena Team Membership News F.J. Carrera (ACO Lead, IFCA CSIC-UC) Our colleague Xavier Barcons is soon In mid-April the annual call for membership of (beginning of September 2017) to the Athena Science Working Groups resulted in start as Director General of ESO. 38 new members from 11 different countries. We He is consequently stepping down have reached 860 members spread all over the from his various Athena roles, in world. which he will be sorely missed. In We wish our community a very successful and particular, he will no longer be a rewarding time in supporting the Athena X-ray member of the ASST or a co-chair observatory, which will enable the exploration of of the Science Working Group 2. the Universe through revolutionary eyes. Francisco J. Carrera will take over as lead of the Athena Community Office (ACO) Athena Community 2017 Thanks to all for joining in this exciting 1% and the coordination of the SKA-Athena Synergy 1% adventure. Exercise. 5% 18% Luigi Piro will lead the Gamma-ray/multi- Athena Community 2017 1% Africa messenger-Athena Synergy Exercise and Kirpal 1% 5% Asia Europe Nandra will conduct the Synergy Exercise with 18% America New Members the Wide-area Optical/IR surveyors, in both cases Australia Africa United States 1 1 1 with ACO support. 1 Asia Italy 75% 2 Japan Europe 2 14 Turkey America United Kingdom 3 Australia Australia Germany 3 Austria China 75% 3 Greece 7 Spain Page 1 Athena Phase A Progress The Athena mission continues to progress through Phase A, with the delta-Mission Con- solidation Review (dMCR) having concluded in April 2017. K. Nandra (MPE) and D. Barret (IRAP), for the Athena Science Study Team The system-level studies of the spacecraft persists at a later stage, e,g. at the time of the and conceptual design work for the instruments Ariane 6 Critical Design Review, a decision to continue, with particular emphasis on the remove the outermost (20th) mirror row can be consolidation of the design of the Science taken. This measure was considered by ESA to be Instrument Module (SIM). The dMCR concluded sufficient to consider the mass-risk issue identified that the SIM design has progressed very at the dMCR to be fully mitigated. significantly since the preceding MCR. A major item under scrutiny during the dMCR was the The other substantial issue identified at the estimated system mass relative to the assumed dMCR was the estimates of the mission cost to Ariane 64 launch capability. Early Athena mass ESA. This exceeds the cap of €1.05bn specified estimates were close to the launcher limit, and non- by the ESA Science Program committee (SPC) at compliant when the margin philosophy advocated the time Athena was selected. A major design-to- by the dMCR panel was adopted. This led to a cost exercise has therefore been initiated along major exercise to identify mass-saving options with parallel efforts to identify cost-mitigation and to optimize the designs to fit the launcher options and efficiency savings. The philosophy capability. behind this is to define a mission with the best possible science performance while meeting the One of the key inputs to this effort was the imposed programmatic constraints. The science ASST-led ‘Science Impact of Mass-Saving Options’ community will be fully involved in this via an (SIMO) exercise, which evaluated the science activity entitled CORE (the Athena Cost-driven implications of a range of different mass-saving Observation Reprogramming Exercise), which changes to the Athena design. All of the Athena is currently being defined within the science Science Working Groups participated in this effort, working groups. The process is expected to result culminating in a meeting of the ASST and Topical in a stable baseline for the Athena mission to Panel chairs at SRON (Utrecht) on February 22- be carried through Phase A and beyond. This 23rd 2017. These results were considered by the should be completed by approximately the end of ASST at a later meeting with the ESA project team, September. resulting in a recommendation to maintain the More information from ESA about the Athena current design as baseline. Due to uncertainties in mission and timeline is available at the both the current mass estimates and the eventual ESA* website. launcher capabilities, however, the ASST also made a recommendation that if a mass issue * http://sci.esa.int/cosmic-vision/54517-athena/ Athena’s Science Study Team and Topical Panel chairs meet at SRON, February 2017. Page 2 News from the Instruments News from the WFI A. Rau (WFI Project Scientist) and K. Nandra (WFI Principal Investigator) In the current project phase, work within the processing speed, with the verification of the real- WFI proto-consortium focuses on the development time processing requirements expected by the of the instrument’s conceptual design and on end of 2017. technology developments. To review the status of all activities, in January 2017 more than 70 In the context of
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