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CERN Document Server 2,033 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 3.79 secondes. 
1.
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Euclid. IV. The NISP Calibration Unit / Euclid Collaboration
The near-infrared calibration unit (NI-CU) on board Euclid's Near-Infrared Spectrometer and Photometer (NISP) is the first astronomical calibration lamp based on light-emitting diodes (LEDs) to be operated in space. [...]
arXiv:2405.13494. - 21.
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Euclid: Constraining linearly scale-independent modifications of gravity with the spectroscopic and photometric primary probes / Euclid Collaboration
The future Euclid space satellite mission will offer an invaluable opportunity to constrain modifications to Einstein's general relativity at cosmic scales. We focus on modified gravity models characterised, at linear scales, by a scale-independent growth of perturbations while featuring different testable types of derivative screening mechanisms at smaller non-linear scales [...]
arXiv:2306.12368.- 2024-10-01 - 22 p. - Published in : Astron. Astrophys. 690 (2024) A133 Fulltext: 2306.12368 - PDF; Publication - PDF; document - PDF;
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Euclid preparation. Sensitivity to non-standard particle dark matter model / Euclid Collaboration
The Euclid mission of the European Space Agency will provide weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model and its extensions, with an opportunity to test the properties of dark matter beyond the minimal cold dark matter paradigm. [...]
arXiv:2406.18274 ; TTK-24-26. - 31.
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Euclid. I. Overview of the Euclid mission / Euclid Collaboration
The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. [...]
arXiv:2405.13491. - 94.
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Gaia Data Release 3: The extragalactic content / Gaia Collaboration
The Gaia Galactic survey mission is designed and optimized to obtain astrometry, photometry, and spectroscopy of nearly two billion stars in our Galaxy. Yet as an all-sky multi-epoch survey, Gaia also observes several million extragalactic objects down to a magnitude of G~21 mag. [...]
arXiv:2206.05681.- 2023-06-01 - 33 p. - Published in : Astron. Astrophys. 674 (2023) A41 Fulltext: 2206.05681 - PDF; document - PDF;
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First detection of the Crab Nebula at TeV energies with a Cherenkov telescope in dual-mirror Schwarzschild-Couder configuration: the ASTRI-Horn telescope / Lombardi, S. (Rome Observ. ; ASDC, Frascati) ; Catalano, O. (IASF, Palermo) ; Scuderi, S. (IASF, Milan) ; Antonelli, L.A. (Rome Observ. ; ASDC, Frascati) ; Pareschi, G. (Brera Observ.) ; Antolini, E. (Bologna Observ.) ; Arrabito, L. (U. Montpellier 2, LUPM) ; Bellassai, G. (Catania Astrophys. Observ.) ; Bernlöhr, K. (Heidelberg, Max Planck Inst.) ; Bigongiari, C. (Rome Observ.) et al.
We report on the first detection of very high-energy (VHE) gamma-ray emission from the Crab Nebula by a Cherenkov telescope in dual-mirror Schwarzschild-Couder (SC) configuration. The result has been achieved by means of the 4 m size ASTRI-Horn telescope, operated on Mt. [...]
arXiv:1909.12149.- 2020-02-01 - 6 p. - Published in : Astron. Astrophys. 634 (2020) A22 Fulltext: PDF;
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Gaia Early Data Release 3 - The celestial reference frame (Gaia-CRF3) / Gaia Collaboration
Gaia-CRF3 is the celestial reference frame for positions and proper motions in the third release of data from the Gaia mission, Gaia DR3 (and for the early third release, Gaia EDR3, which contains identical astrometric results). The reference frame is defined by the positions and proper motions at epoch 2016.0 for a specific set of extragalactic sources in the (E)DR3 catalogue. [...]
arXiv:2204.12574.- 2022-11-01 - 31 p. - Published in : Astron. Astrophys. 667 (2022) A148 Fulltext: document - PDF; 2204.12574 - PDF;
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Planck 2015 results. XVII. Constraints on primordial non-Gaussianity / Planck Collaboration
The Planck full mission cosmic microwave background(CMB) temperature and E-mode polarization maps are analysed to obtain constraints on primordial non-Gaussianity(NG). Using three classes of optimal bispectrum estimators - separable template-fitting (KSW), binned, and modal - we obtain consistent values for the local, equilateral, and orthogonal bispectrum amplitudes, quoting as our final result from temperature alone fNL^local=2.5+\-5.7, fNL^equil=-16+\-70 and fNL^ortho=-34+\-33(68%CL) [...]
arXiv:1502.01592.- 2016-09-20 - 66 p. - Published in : Astron. Astrophys. 594 (2016) A17 Fulltext: PDF; External link: Preprint
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Planck 2015 results. XVIII. Background geometry & topology / Planck Collaboration
Full-sky CMB maps from the 2015 Planck release allow us to detect departures from global isotropy on the largest scales. We present the first searches using CMB polarization for correlations induced by a non-trivial topology with a fundamental domain intersecting, or nearly intersecting, the last scattering surface (at comoving distance $\chi_{rec}$) [...]
arXiv:1502.01593.- 2016-09-20 - 21 p. - Published in : Astron. Astrophys. 594 (2016) A18 Fulltext: PDF; External link: Preprint
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Measurement of the high-energy gamma-ray emission from the Moon with the Fermi Large Area Telescope / Fermi LAT Collaboration
We have measured the gamma-ray emission spectrum of the Moon using the data collected by the Large Area Telescope onboard the Fermi satellite during its first 7 years of operation, in the energy range from 30 MeV up to a few GeV. We have also studied the time evolution of the flux, finding a correlation with the solar activity. [...]
arXiv:1604.03349.- 2016-04-08 - 16 p. - Published in : Phys. Rev. D 93 (2016) 082001 Fulltext: arXiv:1604.03349 - PDF; 10.1103_PhysRevD.93.082001 - PDF; External link: Preprint
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