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SPICA is a far-infrared astronomy joint European-Japanese project. A proposal was submitted in late 2016 to the ESA Cosmic Vision call for an M-type mission. SPICA was selected on May 7, 2018 as one of the three projects to be studied further. The downselection should take place in late 2021, with a launch foreseen in 2032. With a 2.5-meter diameter, its large mirror will be actively cooled down to less than 8K. SPICA will achieve high sensitivity and spatial resolution. At least three instruments are currently planned in the payload: i) the European SAFARI (SpicA FAR-infrared Instrument) will operate from 34 to 230 microns with a spectral resolution from 300 to 11,000, ii) the European BiBoP, a far-infrared imaging polarimeter; and iii) the mid-infrared camera and spectrometer (12-36 microns with various spectral resolutions).

SMARTNet was born during a dedicated meeting in Leiden in 2015, were a number of invited colleagues discussed how to ease and improve the many multi-wavelength campaigns. The outcomes of the discussions that took place at the meeting have been summarized and formalized in the publication of a White Paper. The paper describes also the current challenges in the effort to organize prompt and efficent multi-wavelength campaings in the current and near-future scenario. SMARTNet is not (yet) the ultimate solution to face all these challenges, but it’s a good a starting point. It is simply a networking tool for Astronomers. It is intended to be community driven, with no leadership nor formal rules. It’s also very easy to join: when signing in, you should fill in a few details about your own expertise and interests, a few-minutes job.

On 20 June 2017 ESA selected LISA - Laser Interferometer Space Antenna - as the candidate for the Large-class mission L3. LISA is expected to fly in 2032-2034, and after an intense phase of planning and preparation, the mission shall initiate the Phase A development in April 2018. LISA will open a new window in the exploration of the Universe as well as for testing general relativity and for studying many aspects of fundamental physics.

The enhanced X-ray Timing and Polarimetry mission (eXTP) is a science mission designed to study the state of matter under extreme conditions of density, gravity and magnetism. Primary goals are the determination of the equation of state of matter at supra-nuclear density, the measurement of QED effects in highly magnetized star, and the study of accretion in the strong-field regime of gravity. Primary targets include isolated and binary neutron stars, strong magnetic field systems like magnetars, and stellar-mass and supermassive black holes. The mission carries a unique and unprecedented suite of state-of-the-art scientific instruments enabling for the first time ever the simultaneous spectral-timing-polarimetry studies of cosmic sources in the energy range from 0.5-30 keV (and beyond).

THESEUS is a mission concept proposed in response to the ESA call for medium-size mission (M5) within the Cosmic Vision Programme and selected by ESA on 2018 May 7 to enter an assessment phase study. The mission is designed to vastly increase the discovery space of the high energy transient phenomena over the entirety of cosmic history. Its primary scientific goals will address the Early Universe ESA Cosmic Vision themes “How did the Universe originate and what is made of?” (4.1, 4.2 and 4.3) and will also impact on “The gravitational wave Universe” (3.2) and “The hot and energetic Universe” themes. This is achieved via a unique payload providing an unprecedented combination of: 1) wide and deep sky monitoring in a broad energy band (0.3keV - 20 MeV); 2) focusing capabilities in the soft X-ray band providing large grasp and high angular resolution; and 3) on board near-IR capabilities for immediate transient identification and redshift determination.

LOFT, the Large Observatory For X-ray Timing, is a newly proposed space mission intended to answer fundamental questions about the motion of matter orbiting close to the event horizon of a black hole, and the state of matter in neutron stars. LOFT was selected by ESA as one of the four M3 space missions concepts of the Cosmic Vision programme. LOFT was not selected as the final M3 or M4 mission to be lauched on the 2020s but has been evolved as a concept mission into the eXTP project.

XIPE is a new mission concept selected by ESA in June 2015 to undergo a 2 years-long assessment phase in the context of the Cosmic Vision M4 competition. The mission is devoted to the observation of celestial sources in X-rays:
X-ray polarimetry is photon hungry, but scientifically needed
A dedicated mission is required
XIPE has not been selected as the ESA M4 mission candidate to be implemented, but a similar mission is being developed by NASA and it is named IXPE.

JEM-EUSO: the Extreme Universe Space Observatory

JEM-EUSO will be second cosmic ray instrument on board of ISS, after the Alpha Magnetic Spectrometer 02 (AMS-02, aimed at detection of low energy cosmic rays). Contrary to the AMS-02, JEM-EUSO will not be a particle detector in a proper sense, because it will not detect the high-energy particles themselves. Instead, it will use the Earth’s atmosphere as a calorimeter of particle physics detector. It will detect ultraviolet fluorescence light produced by the air molecules excited by the Ultra High Energy Cosmic Rays (UHECR) induced Extensive Air Shower (EAS). JEM-EUSO will be a refractive ultraviolet telescope with aperture 2.5 m and field of view of 60° operating in the 300-400 nm wavelength range. The light will be focused by a system of three Fresnel lenses made from UV transparent polymers. UV photons reaching the focal plane will be detected by an array of multi-anode photomultipliers (MAPMT) with 3×105 pixels.

The X-Ray Imaging and Spectroscopy Mission (XRISM), formerly named the X-ray Astronomy Recovery Mission (XARM, pronounced "charm"),[Note 1] is an X-ray astronomy satellite of the Japan Aerospace Exploration Agency (JAXA) to provide breakthroughs in the study of structure formation of the universe, outflows from galaxy nuclei, and dark matter.[3][4] As the only international X-ray observatory project of its period, XRISM will function as a next generation space telescope in the X-ray astronomy field, similar to how the James Webb Space Telescope, Fermi Space Telescope, and the ALMA Observatory are placed in their respective fields.[2][5] The mission will crosslink X-ray telescopes of the present (Chandra, XMM-Newton) with that of the future (ATHENA, Lynx/X-Ray Surveyor), thus preventing the formation of a blank period in X-ray astronomy in the early 2020s resulting from the loss of Hitomi.[2][5] During its formulation, XRISM/XARM was also known as the "ASTRO-H Successor", "ASTRO-H2".  [source: wikippedia]

 Advanced Telescope for High Energy Astrophysics

Athena is an X-ray observatory to be proposed as a large mission for the ESA science program. It will be conceived to answer some of the most pressing questions in Astrophysics for the late 2020s that can uniquely be addressed with X-ray observations.

Athena will transform our understanding of two major components of the Cosmos:

The Hot Universe: the bulk of visible matter in the Universe comprises hot gas which can only be accessed via space-based facilities operating in the X-ray band. Revealing this gas and relating its physical properties and evolution to the cosmological large-scale structure, and the cool components in galaxies and stars, is essential if we are to have a complete picture of our Universe.

The Energetic Universe: accretion onto black holes is one of the major astrophysical energy generation processes, and its influence via cosmic feedback is profound and widespread. X-ray observations provide unique information about the physics of black hole growth and the causes and effects of the subsequent energy output, as well as revealing where in the Universe black hole accretion is occurring and how it evolves to the highest redshifts.