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  • F2 : From the Big Bang to the future Universe | UnivEarthS
    sensitive experiment with an exquisite control of systematic errors Most of the experiments or projects dedicated to the quest are based on the well known direct imaging technology While imagers measure maps of the CMB interferometers directly measure Fourier components of the Stokes parameters and thus are expected to be less sensitive to systematic effects Unfortunately the classical heterodyne interferometry concept may have reached its limits in term of scale and sensitivity However Bolometric Interferometry could combine the advantages of interferometry in terms of systematic effects handling and those of direct detectors in terms of sensitivity Although many experiments are already proposed in the USA ground based and balloon borned only one project is emerging in Europe the QUBIC program supported by a French Italian USA UK Irish collaboration http www qubic org The APC CMB team including its experimental laboratory is leading this research effort with particular interest in Conception and design of the QUBIC instrument Data analysis and simulations Development of the detection chain Bolometer arrays based on the Transition Edge Sensors TES technology and multiplexed readout Kinetic Inductance Detectors KIDs a new path towards large detector arrays this new detection technique uses the variation of kinetic inductance of a superconductor when it absorbs a photon flux Their advantages are the following i they are relatively simple to fabricate ii the readout electronics is inherently multiplexed allowing for a large number of detectors of the order of 1000 or more to be readout with a single wire and iii the intrinsic sensitivity could theoretically be very high We propose to couple these new detectors with the current developments made for TESs Within 2 years a demonstrator of some 100s KIDs will be realized fully compatible with the QUBIC requirements The number of detectors will be further improved to reach some thousands of KIDs within 10 years Realization of receiver horns based on the platelets technology The goal is to achieve during the 4 coming years a complete design of the final instrument which means that it will be necessary to develop all the detector chain and choose between the 2 possible solutions we are working on KIDS and TES based arrays We will also have to build a prototype of the first module within 2 years in order to perform first observations on the sky and consequently to tune and improve the behaviour of this first module As developed in section 6 we intent to put the LABEX contributions on the KIDs development and on the conception and design of the instrument which is now well established but still needs some important effort in the data analysis aspects The description of the concept is on the process to be published and available on the archive QUBIC The QU Bolometric Interferometer for Cosmology E Battistelli et al astro ph 1010 0645 and submitted to AstroParticle Physics 3 Understanding the nature of Dark Energy The other sub work package has a different timeline it concerns the analysis of data of

    Original URL path: http://www.univearths.fr/en/f2-big-bang-future-universe?quicktabs_menu_f2_en=0 (2015-10-10)
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  • F2a: Support to PCCP | UnivEarthS
    research education and scientific exchanges in the field of cosmology or more generally the physics of the Universe It was created in February 2010 by George F Smoot when he was hired as professor of the University Paris Diderot and he saw the opportunity to create a large Parisian centre dedicated to cosmology Supported from the start by University Paris Diderot CNRS IN2P3 and the Paris Observatory PCCP aims at developing a synergy between the Parisian laboratories at present APC LPNHE LUTh GEPI LPTENS to enhance the contribution of the French community to the rapidly developing field of cosmology LabEx UnivEarthS contributes to the financing of some of the actions of PCCP such as the organization of workshops visitors and postdoctoral programs but also the training of high school teachers and the conception of a general public MOOC to share a scientific adventure on the frontiers of the knowledge 13 10 2014 Pierre Binétruy PR Paris Diderot George F Smoot Chaire d Excellence SPC Michel Spiro Conseiller Scientifique CEA Federico Piazza Postdoc CNRS Paris Diderot Andrea Tartari Postdoc LabEx F2 Chaire Excellence Mark Jackson Postdoc Paris Diderot Mauro Pieroni Ph D Student SPC fellowship Marie Verleure Project Manager Paris Diderot Teaching the Universe 2013 13 10 2014 Outreach Teaching the Universe 3 days annual workshop designed for high school teachers General Public Mooc Massive Open Online Course Gravity From Big Bang to black holes Scientific activities Workshops Conferences Financing Visitor program Fellowships CMB detection workshop Map of cosmology concepts 13 10 2014 See the PCCP web site pariscosmo fr 13 10 2014 Probing Massive Stars Around Gamma Ray Burst Progenitors Wenbin Lu Pawan Kumar George F Smoot Jan 29 2015 e Print arXiv 1501 07606 astro ph HE 21 cm Intensity Mapping with FAST George F Smoot Ivan Debono Jul

    Original URL path: http://www.univearths.fr/en/f2a-support-pccp?mini=node%2F333%2F2015-09 (2015-10-10)
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  • F2a: Support to PCCP | UnivEarthS
    research education and scientific exchanges in the field of cosmology or more generally the physics of the Universe It was created in February 2010 by George F Smoot when he was hired as professor of the University Paris Diderot and he saw the opportunity to create a large Parisian centre dedicated to cosmology Supported from the start by University Paris Diderot CNRS IN2P3 and the Paris Observatory PCCP aims at developing a synergy between the Parisian laboratories at present APC LPNHE LUTh GEPI LPTENS to enhance the contribution of the French community to the rapidly developing field of cosmology LabEx UnivEarthS contributes to the financing of some of the actions of PCCP such as the organization of workshops visitors and postdoctoral programs but also the training of high school teachers and the conception of a general public MOOC to share a scientific adventure on the frontiers of the knowledge 13 10 2014 Pierre Binétruy PR Paris Diderot George F Smoot Chaire d Excellence SPC Michel Spiro Conseiller Scientifique CEA Federico Piazza Postdoc CNRS Paris Diderot Andrea Tartari Postdoc LabEx F2 Chaire Excellence Mark Jackson Postdoc Paris Diderot Mauro Pieroni Ph D Student SPC fellowship Marie Verleure Project Manager Paris Diderot Teaching the Universe 2013 13 10 2014 Outreach Teaching the Universe 3 days annual workshop designed for high school teachers General Public Mooc Massive Open Online Course Gravity From Big Bang to black holes Scientific activities Workshops Conferences Financing Visitor program Fellowships CMB detection workshop Map of cosmology concepts 13 10 2014 See the PCCP web site pariscosmo fr 13 10 2014 Probing Massive Stars Around Gamma Ray Burst Progenitors Wenbin Lu Pawan Kumar George F Smoot Jan 29 2015 e Print arXiv 1501 07606 astro ph HE 21 cm Intensity Mapping with FAST George F Smoot Ivan Debono Jul

    Original URL path: http://www.univearths.fr/en/f2a-support-pccp?quicktabs_menu_f2a_en=0 (2015-10-10)
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  • F3 : The transient catastrophic Universe | UnivEarthS
    Europe ASKAP Autralia and MeerKAT South Africa that are the precursor instruments of the major international SKA facility to be developed for the 2020 The synchrotron radio emission probes with unequalled angular resolution the cooling in the ambient magnetic field of the relativistic particles ejected by compact accretors or explosions It also constrains the kinetic feedback of such events on their environment Artistic view of a small part of the SKA kilometer array a decision regarding the selection of the SKA site is expected in the next months Algorithmic improvements for transient detection would yield improved use of the different combinations of fields of view and unprecedented sensitivities offered by these instruments The vast storage and computational requirements of transient searches in particular for imaging interferometers also requires the development of near real time detection pipelines The LOFAR project is engaged in the development of first generation pipelines The characterization of transients and their identification at other wavelengths represents another challenge LOFAR is a radio telescope currently being built in The Netherlands and neighboring countries Image from one of the Lofar low frequency station in Nançay France Astrophysics of high energy Stéphane Corbel Professeur des Universités AIM Isabelle Grenier Professeur des Universités AIM Jean Luc Starck Chercheur CEA AIM Page web Julien Girard Post doc LabEx UnivEarthS AIM Page web à venir Ming Jiang Doctorant CEA AIM Page web Hugh Garsden LEDA project Harvard Observatory ex post doc LabEx UnivEarthS Page web In collaboration with Cyril Tasse GEPI Observatoire de Paris and the LOFAR TKP MeerKAT ThunderKAT and ASKAP VAST collobarations Astrophysics of high energy Past results The efforts deployed by the members of the teams were focused on the development of a sparse imager for aperture synthesis imaging of data acquired with new generation of giant radiotelescope such as LOFAR and SKA The image reconstruction from simulated and real data has demonstrated the robustness of such imager as well as its capacity to produce super resolved images see the CEA news here The page associated with the development of the code is on the CosmoStat website here All details and results were published in A A Garsden et al 2015 check publication section Current developments The next step is the development of a 3D extension of the code enabling the robust temporal reconstruction of the data containing information about transient radio sources The latter are rather difficult to image correctly with the classical imaging method used in interferometry The third step is the developement of a multi channel imager which accounts for the frequency information of the data enabling not only the reconstruction of source flux but also to put constraint of their spectral behavior reconstructing spectral index information by applying a sparse component seperation technique These two steps constitutes the current work of Ming Jiang PhD student at AIM CEA Saclay and Julien Girard Post doc UnivEarthS These generic tools will be compatible with new generation radio interferometers especially LOFAR but the other SKA pathfinders and precursors as

    Original URL path: http://www.univearths.fr/en/f3-transient-catastrophic-universe?mini=node%2F333%2F2015-09 (2015-10-10)
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  • F3 : The transient catastrophic Universe | UnivEarthS
    Europe ASKAP Autralia and MeerKAT South Africa that are the precursor instruments of the major international SKA facility to be developed for the 2020 The synchrotron radio emission probes with unequalled angular resolution the cooling in the ambient magnetic field of the relativistic particles ejected by compact accretors or explosions It also constrains the kinetic feedback of such events on their environment Artistic view of a small part of the SKA kilometer array a decision regarding the selection of the SKA site is expected in the next months Algorithmic improvements for transient detection would yield improved use of the different combinations of fields of view and unprecedented sensitivities offered by these instruments The vast storage and computational requirements of transient searches in particular for imaging interferometers also requires the development of near real time detection pipelines The LOFAR project is engaged in the development of first generation pipelines The characterization of transients and their identification at other wavelengths represents another challenge LOFAR is a radio telescope currently being built in The Netherlands and neighboring countries Image from one of the Lofar low frequency station in Nançay France Astrophysics of high energy Stéphane Corbel Professeur des Universités AIM Isabelle Grenier Professeur des Universités AIM Jean Luc Starck Chercheur CEA AIM Page web Julien Girard Post doc LabEx UnivEarthS AIM Page web à venir Ming Jiang Doctorant CEA AIM Page web Hugh Garsden LEDA project Harvard Observatory ex post doc LabEx UnivEarthS Page web In collaboration with Cyril Tasse GEPI Observatoire de Paris and the LOFAR TKP MeerKAT ThunderKAT and ASKAP VAST collobarations Astrophysics of high energy Past results The efforts deployed by the members of the teams were focused on the development of a sparse imager for aperture synthesis imaging of data acquired with new generation of giant radiotelescope such as LOFAR and SKA The image reconstruction from simulated and real data has demonstrated the robustness of such imager as well as its capacity to produce super resolved images see the CEA news here The page associated with the development of the code is on the CosmoStat website here All details and results were published in A A Garsden et al 2015 check publication section Current developments The next step is the development of a 3D extension of the code enabling the robust temporal reconstruction of the data containing information about transient radio sources The latter are rather difficult to image correctly with the classical imaging method used in interferometry The third step is the developement of a multi channel imager which accounts for the frequency information of the data enabling not only the reconstruction of source flux but also to put constraint of their spectral behavior reconstructing spectral index information by applying a sparse component seperation technique These two steps constitutes the current work of Ming Jiang PhD student at AIM CEA Saclay and Julien Girard Post doc UnivEarthS These generic tools will be compatible with new generation radio interferometers especially LOFAR but the other SKA pathfinders and precursors as

    Original URL path: http://www.univearths.fr/en/f3-transient-catastrophic-universe?mini=node%2F333%2F2015-11 (2015-10-10)
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  • F3 : The transient catastrophic Universe | UnivEarthS
    LOFAR Europe ASKAP Autralia and MeerKAT South Africa that are the precursor instruments of the major international SKA facility to be developed for the 2020 The synchrotron radio emission probes with unequalled angular resolution the cooling in the ambient magnetic field of the relativistic particles ejected by compact accretors or explosions It also constrains the kinetic feedback of such events on their environment Artistic view of a small part of the SKA kilometer array a decision regarding the selection of the SKA site is expected in the next months Algorithmic improvements for transient detection would yield improved use of the different combinations of fields of view and unprecedented sensitivities offered by these instruments The vast storage and computational requirements of transient searches in particular for imaging interferometers also requires the development of near real time detection pipelines The LOFAR project is engaged in the development of first generation pipelines The characterization of transients and their identification at other wavelengths represents another challenge LOFAR is a radio telescope currently being built in The Netherlands and neighboring countries Image from one of the Lofar low frequency station in Nançay France Astrophysics of high energy Stéphane Corbel Professeur des Universités AIM Isabelle Grenier Professeur des Universités AIM Jean Luc Starck Chercheur CEA AIM Page web Julien Girard Post doc LabEx UnivEarthS AIM Page web à venir Ming Jiang Doctorant CEA AIM Page web Hugh Garsden LEDA project Harvard Observatory ex post doc LabEx UnivEarthS Page web In collaboration with Cyril Tasse GEPI Observatoire de Paris and the LOFAR TKP MeerKAT ThunderKAT and ASKAP VAST collobarations Astrophysics of high energy Past results The efforts deployed by the members of the teams were focused on the development of a sparse imager for aperture synthesis imaging of data acquired with new generation of giant radiotelescope such as LOFAR and SKA The image reconstruction from simulated and real data has demonstrated the robustness of such imager as well as its capacity to produce super resolved images see the CEA news here The page associated with the development of the code is on the CosmoStat website here All details and results were published in A A Garsden et al 2015 check publication section Current developments The next step is the development of a 3D extension of the code enabling the robust temporal reconstruction of the data containing information about transient radio sources The latter are rather difficult to image correctly with the classical imaging method used in interferometry The third step is the developement of a multi channel imager which accounts for the frequency information of the data enabling not only the reconstruction of source flux but also to put constraint of their spectral behavior reconstructing spectral index information by applying a sparse component seperation technique These two steps constitutes the current work of Ming Jiang PhD student at AIM CEA Saclay and Julien Girard Post doc UnivEarthS These generic tools will be compatible with new generation radio interferometers especially LOFAR but the other SKA pathfinders and precursors

    Original URL path: http://www.univearths.fr/en/f3-transient-catastrophic-universe?quicktabs_menu_f3_en=0 (2015-10-10)
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  • Job Offer | UnivEarthS
    Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY Experimental Dark Matter Search Post Doctoral Research Fellow IGOSat internship PhD position Effect of the North South dichotomy on the thermal structure and evolution of Mars Search this site October Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Sign in Password forgotten Home OVERVIEW Scientific areas Job Offer 22 02 2013 One postdoctoral position in Astronomical Data Analysis In the framework of the UnivEarthsS LabEx program the astrophysics division of CEA Saclay is offering one postdoctoral position for an initial period of 2 years to work with Stephane Corbel and Jean Luc Starck on radio transients detection Over the next decade a combination of increased sensitivity larger field of view and algorithmic developments will open up the time domain to a wide range of astronomical fields Radio astronomy is leading this effort and transient science is identified as a key goal for LOFAR Europe ASKAP Autralia and MeerKAT South Africa the precursor instruments of the major international SKA facility to be developed for 2016 The applicant will work in one of these related topics Transient search in one of the affiliated key projects TKP LOFAR ThunderKAT MeerKAT VAST ASKAP Optimization of current methods and development of near real time detection pipelines Image reconstruction from undersampled Fourier measurements using compressed sensing sparse recovery methods Minimum qualifications include an undergraduate degree or higher in astronomy physics computer science statistics or related field The candidate must have a strong motivation in developing statistical methods and applying them in large international projects

    Original URL path: http://www.univearths.fr/en/node/329 (2015-10-10)
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  • Next conference on radioastronomy | UnivEarthS
    PCCP The transient catastrophic Universe Interface projects Geoparticles Fundamental physics and Geophysics in space From dust to planets Former Interface projects Formation and early evolution of Planetary systems The youth of cosmic rays and their emergence in the interstellar clouds Gamma ray instrumentation development Young team project Experimental geophysics Valorization project Data distribution visualisation and cloud computing PUBLICATIONS EDUCATIONAL Nanosatellite student project IGOsat UnivEarthS JOB OPPORTUNITY Experimental Dark Matter Search

    Original URL path: http://www.univearths.fr/en/node/291 (2015-10-10)
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