Bibliografias temáticas / Euclid mission

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Literatura científica selecionada sobre o tema "Euclid mission"

Autor: Grafiati
Publicado: 1 de abril de 2023

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Artigos de revistas sobre o assunto "Euclid mission"

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de Teodoro, P., S. Nieto e B. Altieri. "Data Management in the Euclid Science Archive System". Proceedings of the International Astronomical Union 12, S325 (outubro de 2016): 385–88. http://dx.doi.org/10.1017/s1743921316012874.

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AbstractEuclid is the ESA M2 mission and a milestone in the understanding of the geometry of the Universe. In total Euclid will produce up to 26 PB per year of observations. The Science Archive Systems (SAS) belongs to the Euclid Archive System (EAS) that sits in the core of the Euclid Science Ground Segment (SGS). The SAS is being built at the ESAC Science Data Centre (ESDC), which is responsible for the development and operations of the scientific archives for the Astronomy, Planetary and Heliophysics missions of ESA. The SAS is focused on the needs of the scientific community and is intended to provide access to the most valuable scientific metadata from the Euclid mission. In this paper we describe the architectural design of the system, implementation progress and the main challenges from the data management point of view in the building of the SAS.
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Tereno, I., C. S. Carvalho, J. Dinis, R. Scaramella, J. Amiaux, C. Burigana, J. C. Cuillandre et al. "Euclid Space Mission: building the sky survey". Proceedings of the International Astronomical Union 10, S306 (maio de 2014): 379–81. http://dx.doi.org/10.1017/s174392131401093x.

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AbstractThe Euclid space mission proposes to survey 15000 square degrees of the extragalactic sky during 6 years, with a step-and-stare technique. The scheduling of observation sequences is driven by the primary scientific objectives, spacecraft constraints, calibration requirements and physical properties of the sky. We present the current reference implementation of the Euclid survey and on-going work on survey optimization.
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Beaulieu, Jean-Philippe, David P. Bennett, Eamonn Kerins e Matthew Penny. "Towards habitable Earths with EUCLID and WFIRST". Proceedings of the International Astronomical Union 6, S276 (outubro de 2010): 349–53. http://dx.doi.org/10.1017/s1743921311020424.

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AbstractThe discovery of extrasolar planets is arguably the most exciting development in astrophysics during the past 15 years, rivalled only by the detection of dark energy. Two projects are now at the intersection of the two communities of exoplanet scientists and cosmologists: EUCLID, proposed as an ESA M-class mission; and WFIRST, the top-ranked large space mission for the next decade by the Astro 2010 Decadal Survey report. The missions are to have several important science programs: a dark energy survey using weak lensing, baryon acoustic oscillations, Type Ia supernova, a survey of exoplanetary architectures using microlensing, and different surveys. The WFIRST and EUCLID microlensing planet search programs will provide a statistical census of exoplanets with masses greater than the mass of Mars and orbital separations ranging from 0.5 AU outwards, including free-floating planets. This will include analogs of all Solar System planets except for Mercury, as well as most types of planets predicted by planet formation theories. In combination with Kepler's census of planets in shorter period orbits, EUCLID and WFIRST's planet search programs will provide a complete statistical census of the planets that populate our Galaxy. As of today, EUCLID is proposed to ESA as a M class mission (the result of the selection will be known in october 2011). We are presenting here preliminary results about the expected planet yields. WFIRST has just appointed a Science Definition Team.
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Dubath, Pierre, Nikolaos Apostolakos, Andrea Bonchi, Andrey Belikov, Massimo Brescia, Stefano Cavuoti, Peter Capak et al. "The Euclid Data Processing Challenges". Proceedings of the International Astronomical Union 12, S325 (outubro de 2016): 73–82. http://dx.doi.org/10.1017/s1743921317001521.

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AbstractEuclid is a Europe-led cosmology space mission dedicated to a visible and near infrared survey of the entire extra-galactic sky. Its purpose is to deepen our knowledge of the dark content of our Universe. After an overview of the Euclid mission and science, this contribution describes how the community is getting organized to face the data analysis challenges, both in software development and in operational data processing matters. It ends with a more specific account of some of the main contributions of the Swiss Science Data Center (SDC-CH).
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Laureijs, René. "Observing the high redshift Universe with Euclid". Proceedings of the International Astronomical Union 12, S333 (outubro de 2017): 238–41. http://dx.doi.org/10.1017/s1743921318000595.

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AbstractEuclid enables the exploration of large sky areas with diffraction limited resolution in the optical and near-infrared, and is sensitive enough to detect targets at cosmological distances. This combination of capabilities gives Euclid a clear advantage over telescope facilities with larger apertures, both on ground and in space. The decision to mount in the NISP instrument one extra grism for the wavelength range 0.92-1.3 μm with a spectral resolution of R ≈260 makes possible a rest-frame UV survey of the early Universe in the redshift range 6.5 < z < 9.7. Euclid’s standard imaging with VIS in the 0.55-0.9 μm band and with NISP in the Y, J, H bands provide complementary photometry for further target identification and characterization. Euclid is a suitable facility to discover and map the spatial distribution of rare high-redshift targets and to collect statistically relevant samples, in particular of high redshift Lyα emitters and QSOs, which can be used as signposts of the cosmic structures. The Euclid surveys are also a starting point for deeper follow up observations of the individual high-z objects. We present the Euclid mission and discuss the detectability of high-z objects to probe the epoch of ionization.
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Martin, E. L. "Ultracool dwarf legacy science with ESA's Euclid mission". EPJ Web of Conferences 47 (2013): 15003. http://dx.doi.org/10.1051/epjconf/20134715003.

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Adam, R., M. Vannier, S. Maurogordato, A. Biviano, C. Adami, B. Ascaso, F. Bellagamba et al. "Euclid preparation". Astronomy & Astrophysics 627 (26 de junho de 2019): A23. http://dx.doi.org/10.1051/0004-6361/201935088.

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Galaxy cluster counts in bins of mass and redshift have been shown to be a competitive probe to test cosmological models. This method requires an efficient blind detection of clusters from surveys with a well-known selection function and robust mass estimates, which is particularly challenging at high redshift. The Euclid wide survey will cover 15 000 deg2 of the sky, avoiding contamination by light from our Galaxy and our solar system in the optical and near-infrared bands, down to magnitude 24 in the H-band. The resulting data will make it possible to detect a large number of galaxy clusters spanning a wide-range of masses up to redshift ∼2 and possibly higher. This paper presents the final results of the Euclid Cluster Finder Challenge (CFC), fourth in a series of similar challenges. The objective of these challenges was to select the cluster detection algorithms that best meet the requirements of the Euclid mission. The final CFC included six independent detection algorithms, based on different techniques, such as photometric redshift tomography, optimal filtering, hierarchical approach, wavelet and friend-of-friends algorithms. These algorithms were blindly applied to a mock galaxy catalog with representative Euclid-like properties. The relative performance of the algorithms was assessed by matching the resulting detections to known clusters in the simulations down to masses of M200 ∼ 1013.25 M⊙. Several matching procedures were tested, thus making it possible to estimate the associated systematic effects on completeness to < 3%. All the tested algorithms are very competitive in terms of performance, with three of them reaching > 80% completeness for a mean purity of 80% down to masses of 1014 M⊙ and up to redshift z = 2. Based on these results, two algorithms were selected to be implemented in the Euclid pipeline, the Adaptive Matched Identifier of Clustered Objects (AMICO) code, based on matched filtering, and the PZWav code, based on an adaptive wavelet approach.
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Inserra, C., R. C. Nichol, D. Scovacricchi, J. Amiaux, M. Brescia, C. Burigana, E. Cappellaro et al. "Euclid: Superluminous supernovae in the Deep Survey". Astronomy & Astrophysics 609 (janeiro de 2018): A83. http://dx.doi.org/10.1051/0004-6361/201731758.

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Context. In the last decade, astronomers have found a new type of supernova called superluminous supernovae (SLSNe) due to their high peak luminosity and long light-curves. These hydrogen-free explosions (SLSNe-I) can be seen to z ~ 4 and therefore, offer the possibility of probing the distant Universe. Aims. We aim to investigate the possibility of detecting SLSNe-I using ESA’s Euclid satellite, scheduled for launch in 2020. In particular, we study the Euclid Deep Survey (EDS) which will provide a unique combination of area, depth and cadence over the mission. Methods. We estimated the redshift distribution of Euclid SLSNe-I using the latest information on their rates and spectral energy distribution, as well as known Euclid instrument and survey parameters, including the cadence and depth of the EDS. To estimate the uncertainties, we calculated their distribution with two different set-ups, namely optimistic and pessimistic, adopting different star formation densities and rates. We also applied a standardization method to the peak magnitudes to create a simulated Hubble diagram to explore possible cosmological constraints. Results. We show that Euclid should detect approximately 140 high-quality SLSNe-I to z ~ 3.5 over the first five years of the mission (with an additional 70 if we lower our photometric classification criteria). This sample could revolutionize the study of SLSNe-I at z > 1 and open up their use as probes of star-formation rates, galaxy populations, the interstellar and intergalactic medium. In addition, a sample of such SLSNe-I could improve constraints on a time-dependent dark energy equation-of-state, namely w(a), when combined with local SLSNe-I and the expected SN Ia sample from the Dark Energy Survey. Conclusions. We show that Euclid will observe hundreds of SLSNe-I for free. These luminous transients will be in the Euclid data-stream and we should prepare now to identify them as they offer a new probe of the high-redshift Universe for both astrophysics and cosmology.
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Scaramella, R., Y. Mellier, J. Amiaux, C. Burigana, C. S. Carvalho, J. C. Cuillandre, A. da Silva et al. "Euclid space mission: a cosmological challenge for the next 15 years". Proceedings of the International Astronomical Union 10, S306 (maio de 2014): 375–78. http://dx.doi.org/10.1017/s1743921314011089.

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AbstractEuclid is the next ESA mission devoted to cosmology. It aims at observing most of the extragalactic sky, studying both gravitational lensing and clustering over ~15,000 square degrees. The mission is expected to be launched in year 2020 and to last six years. The sheer amount of data of different kinds, the variety of (un)known systematic effects and the complexity of measures require efforts both in sophisticated simulations and techniques of data analysis. We review the mission main characteristics, some aspects of the the survey and highlight some of the areas of interest to this meeting.
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Bretonnière, H., M. Huertas-Company, A. Boucaud, F. Lanusse, E. Jullo, E. Merlin, D. Tuccillo et al. "Euclid preparation". Astronomy & Astrophysics 657 (janeiro de 2022): A90. http://dx.doi.org/10.1051/0004-6361/202141393.

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We present a machine learning framework to simulate realistic galaxies for the Euclid Survey, producing more complex and realistic galaxies than the analytical simulations currently used in Euclid. The proposed method combines a control on galaxy shape parameters offered by analytic models with realistic surface brightness distributions learned from real Hubble Space Telescope observations by deep generative models. We simulate a galaxy field of 0.4 deg2 as it will be seen by the Euclid visible imager VIS, and we show that galaxy structural parameters are recovered to an accuracy similar to that for pure analytic Sérsic profiles. Based on these simulations, we estimate that the Euclid Wide Survey (EWS) will be able to resolve the internal morphological structure of galaxies down to a surface brightness of 22.5 mag arcsec−2, and the Euclid Deep Survey (EDS) down to 24.9 mag arcsec−2. This corresponds to approximately 250 million galaxies at the end of the mission and a 50% complete sample for stellar masses above 1010.6 M⊙ (resp. 109.6 M⊙) at a redshift z ∼ 0.5 for the EWS (resp. EDS). The approach presented in this work can contribute to improving the preparation of future high-precision cosmological imaging surveys by allowing simulations to incorporate more realistic galaxies.
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Mais fontes

Teses / dissertações sobre o assunto "Euclid mission"

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Tutusaus, Lleixa Isaac. "Étude des composantes noires de l'univers avec la mission Euclid". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30212/document.

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Le modèle de concordance de la cosmologie, appelé ΛCDM, est un succès de la physique moderne, car il est capable de reproduire les principales observations cosmologiques avec une grande précision et très peu de paramètres libres. Cependant, il prédit l'existence de matière noire froide et d'énergie sombre sous la forme d'une constante cosmologique, qui n'ont pas encore été détectées directement. Par conséquent, il est important de considérer des modèles allant au-delà de ΛCDM et de les confronter aux observations, afin d'améliorer nos connaissances sur le secteur sombre de l'Univers. Le futur satellite Euclid, de l'Agence Spatiale Européenne, explorera un énorme volume de la structure à grande échelle de l'Univers en utilisant principalement le regroupement des galaxies et la distorsion de leurs images due aux lentilles gravitationnelles. Dans ce travail, nous caractérisons de façon quantitative les performances d'Euclid vis-à-vis des contraintes cosmologiques, à la fois pour le modèle de concordance, mais également pour des extensions phénoménologiques modifiant les deux composantes sombres de l'Univers. En particulier, nous accordons une attention particulière aux corrélations croisées entre les différentes sondes d'Euclid lors de leur combinaison et estimons de façon précise leur impact sur les résultats finaux. D'une part, nous montrons qu'Euclid fournira d'excellentes contraintes sur les modèles cosmologiques qui définitivement illuminera le secteur sombre. D'autre part, nous montrons que les corrélations croisées entre les sondes d'Euclid ne peuvent pas être négligées dans les analyses futures et, plus important encore, que l'ajout de ces corrélations améliore grandement les contraintes sur les paramètres cosmologiques
The concordance model of cosmology, called ΛCDM, is a success, since it is able to reproduce the main cosmological observations with great accuracy and only few parameters. However, it predicts the existence of cold dark matter and dark energy in the form of a cosmological constant, which have not been directly detected yet. Therefore, it is important to consider models going beyond ΛCDM, and confront them against observations, in order to improve our knowledge on the dark sector of the Universe. The future Euclid satellite from the European Space Agency will probe a huge volume of the large-scale structure of the Universe using mainly the clustering of galaxies and the distortion of their images due to gravitational lensing. In this work, we quantitatively estimate the constraining power of the future Euclid data for the concordance model, as well as for some phenomenological extensions of it, modifying both dark components of the Universe. In particular, we pay special attention to the cross-correlations between the different Euclid probes when combining them, and assess their impact on the final results. On one hand, we show that Euclid will provide exquisite constraints on cosmological models that will definitely shed light on the dark sector. On the other hand, we show that cross-correlations between Euclid probes cannot be neglected in future analyses, and, more importantly, that the addition of these correlations largely improves the constraints on the cosmological parameters
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Chatron, Jeremie. "Explorer l'Univers primordial avec les quasars : cas de la mission Euclid". Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4705/document.

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Cette thèse s'inscrit dans le domaine d'étude de l'Univers lointain, en particulier sur l'étude d'une période méconnue de notre Univers à savoir « la ré-ionisation ». Le choix de la sonde utilisée pour l'étude d'un Univers aussi lointain est quelque peu restreint. En effet il faut que la sonde soit visible à cette grande distance et donc que ce soit un objet extrêmement lumineux. Ainsi on se sert de galaxies très énergétiques avec un noyau galactique actif (appelées quasars) en tant que sonde. En étudiant le rayonnement de ces quasars on pourra alors caractériser l'environnement qui les entoure. Ces quasars étant des objets rares, il nous faut rechercher sur une grande surface du ciel pour espérer en obtenir quelques uns. Il existe beaucoup de projets d'observation dédiés à la cosmologie, un des futurs projets majeurs nommé Euclid sera un grand pas pour l'étude de la ré-ionisation. Ce futur satellite de l'ESA (lancement prévu en 2020) sera particulièrement performant dans l'infrarouge, permettant ainsi de détecter des quasars à des distances actuellement insondées. Afin de pouvoir bien préparer cette mission il nous faut établir et anticiper les performances attendues d'Euclid. Pour ce faire, il faut mener une étude similaire sur des données existantes puis extrapoler la performance d'Euclid. Pour ce faire, durant ma thèse, j'ai utilisé des données issues du télescope terrestre du CFHT (Canada France Hawaii Telescope) situé à hawaii au mont Mauna Kea
The main topic of this thesis is the study of the distant Universe, particularly the study of a quite unknown period of our Universe namely "reionization." The probe's choice used in the study of a universe so far is somewhat restricted. Indeed it is necessary that the probe be visible at this distance and therefore the probe must be a very bright objet. Thus we used high-energy galaxies with an active galactic nuclei (called quasars) as a probe. By studying the emission of these quasars we can then characterize the environment around them. Because of the huge distance between us and the quasar and due to the expansion of the universe they have their light emissions shifted towards longer wavelengths. Thus, to study the young age of our universe, we need to observe objects in the infrared. These quasars are rare objects, we need to search over a large area of the sky to hope to get a few. There are many projects focused on observational cosmology, a future major project named Euclid will be a big step for the study of reionization. This future ESA satellite (launch planned in 2020) will be particularly effective in the infrared, thus allowing to detect quasars at distances currently unfathomed. In order to prepare this mission we must establish and predict the expected performance of Euclid. To do this, we must conduct a similar study on existing data and extrapolate the performance of Euclid. To do this, in my thesis, I used datas from the terrestrial telescope CFHT (Canada France Hawaii Telescope) located in hawaii at Mauna Kea
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Allanwood, Edgar. "PSF characterisation and optimisation of a CCD for the ESA Euclid mission". Thesis, Open University, 2018. http://oro.open.ac.uk/58394/.

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As part of qualifying the Teledyne-e2v CCD273 for the visible imager (VIS) on the ESA Euclid mission, a front-illuminated CCD273 is tested in order to observe the Point Spread Function (PSF) response with respect to signal and voltage parameters. In order to achieve this an optical characterisation system with the ability to project flat-fields and precisely positioned and focused spot images is constructed and characterised. The Single-Pixel Photon Transfer Curve (SP-PTC) is devised in order to provide an analytical method for characterising the system PSF and the Brigher-Fatter Effect (BFE), a systematic spot-widening with signal, is observed. A technique for confirming the mechanism of the BFE via use of separate spot and flat-field illuminations in a single frame is devised in addition to parallel image clock electrode parametrisation. Device-specific optimisations are also presented regarding bright spot response and elimination of persistence following bright illuminations or charge occupation of the dielectric interface surface states.
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KANSAL, Vanshika. "Simulation of Solar System Objects for the NISP instrument of the ESA Euclid Mission". Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72221.

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Euclid is a medium class mission designed to study the geometry of dark universe. It will work in the visible and near infrared imaging & spectroscopy for a lifetime of 6 years down to the magnitude of mAB = 24.5 with Visible Imager Instrument (VIS) and mAB = 24 with Near Infrared Spectrometer and Photometer instrument in Y, J & H broadband filters. The current survey design will avoid ecliptic latitudes below 15 degrees, but the observation pattern in repeated sequences of four blocks with four broad-band filter seems well-adapted to Solar System object detection. The aim of this thesis is to simulate the Solar System Objects (SSOs) for Near Infrared Spectrometer and Photometer (NISP) instrument and measure the flux/magnitude & position of these moving objects. The simulation of Solar System Objects is implemented in with simulator Imagem using the sky position, velocity, direction of movement and magnitude with respect to band of the objects. The length of the trail is determined using exposure time and after that the sky position is evolved for each band filter. The output images showed the trail of objects which is 2 to 10 pixels long in case of Near Infrared Spectrometer and Photometer instrument. To find out the flux distribution in the trail, the differential photometry is performed. The variation in magnitude was observed at least of 1% to 3% of the magnitude which may also implies that variation in brightness of objects can be observed with the velocity. To detect the moving objects, differential astrometry is also performed, which provides the catalogue with the information of position and proper motion of the objects as well as an image is also generated which showed the detected and undetected objects from all bands in one image.
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Serra, Benoit. "Caractérisation des détecteurs infrarouges de la mission spatiale Euclid : étude des performances des détecteurs infrarouges H2RG". Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4008/document.

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La mission spatiale Euclid a pour but d'apporter des réponses quant à la nature de l'accélération de l'expansion de l'Univers. Afin de déterminer les propriétés de cette accélération, la mission spatiale Euclid va effectuer un relevé de galaxies sur 15 000 deg² de champ en imagerie (instrument VIS) et en spectroscopie (instrument NISP) qui requiert un contrôle des précisions instrumentales, notamment sur le système de détection. L'étude faite pendant la thèse se résume en plusieurs étapes: la première étant d'évaluer les performances du NISP à partir de la définition du rapport signal sur bruit et d'en tirer des spécifications sur le système de détection. La seconde consiste en l'étude du besoin de la caractérisation du système de détection de l'instrument, les détecteurs H2RG. À partir de cette étude, on montrera les performances d'un détecteur sur un banc de test. La troisième étape consiste en l'étude de la détection de rayons cosmiques en vol ainsi que la réalisation d'un outil pour isoler les pixels impactés lors du traitement de données au sol. Après avoir évalué les performances de l'algorithme, on montrera les résultats de l'analyse de données. La dernière partie est l'étude de l'effet de persistance affectant les détecteurs H2RG: à partir de l'impact de ce signal sur les observations du NISP, on définira le besoin de mesures de cet effet. On décrira la campagne de prise de données, accompagnée de leur analyse et de l'interprétation physique de la persistance. Ces analyses permettant de comprendre les problématiques de l'effet de persistance et ont servi à l'élaboration d'une modélisation de cet effet pour estimer quantitativement l'impact sur la mission Euclid
The Euclid space mission aims to provide answers about the nature of the accelerating expansion of the Universe. To determine the properties of this acceleration, the Euclid space mission will conduct a survey of galaxies on a field of 15,000 deg² field of view. Each field will be studied through imaging (VIS instrument) and spectroscopy (NISP instrument) that requires control of instrumental errors, and particularly the detection system. The study made for the thesis can be summarized in several stages: the first is to assess the performance of NISP starting from the definition of the signal to noise ratio and to derive specifications on the detection system. The second is the study of the need for characterization of the detection system of the instrument, the H2RG infrared detectors. From this study, we show the performance of a detector on a dedicated test bench. The third step is the study of the detection of cosmic rays in flight as well as the realization of a tool to isolate the pixels affected using ground data processing. After evaluating the performance of the algorithm, we will show the results of the data analysis. The last part is the study of the persistence effect affecting H2RG detectors: from the impact of the signal on the observations of NISP, we will define the necessary measures for this purpose. We will describe the data acquisition campaign, accompanied by the analysis and physical interpretation of persistence. These analyzes helped to understand the issues of the persistence effect and were used to develop a model of the effect to quantitatively estimate the impact on the Euclid mission
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Nersisyan, Henrik [Verfasser], e Luca [Akademischer Betreuer] Amendola. "Infrared Nonlocal Gravity Theories : Optimizing Science Return to Euclid Satellite Mission / Henrik Nersisyan ; Betreuer: Luca Amendola". Heidelberg : Universitätsbibliothek Heidelberg, 2017. http://d-nb.info/117801066X/34.

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Guinot, Axel. "Weak lensing analysis of the Canada-France Imaging Survey : from pixels to cosmology, preparation for the Euclid mission". Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7106.

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Parmi les grandes questions auxquelles la cosmologie fait face aujourd’hui, la nature de la matière noire et de l’énergie noire sont au centre des relevés à venir. Les futures missions de stade IV Euclid et LSST vont couvrir une surface du ciel jamais atteinte auparavant dans le but de révéler les structures aux très grandes échelles et de différentes époques. Le lentillage gravitationnel faible sera une des sondes cosmologiques utilisées pour tracer la matière noire. Le lentillage gravitationnel est un phénomène physique qui utilise la distorsion de la lumière pour tracer la présence de masses dans l’Univers. Ce qui est intéressant avec le lentillage gravitationnel faible est sa sensitivité à la masse totale, i.e. baryonique et non-baryonique. Dû au lentillage gravitationnel, les galaxies distantes apparaissent distordues sur les images observées. La mesure des distorsions provoquées par le cisaillement gravitationnel requiert une très précise estimation des formes des galaxies. Cette thèse présentera la chaîne de réduction de données construites pour l’étude du lentillage gravitationnel faible, depuis le télescope jusqu’à l’inférence des paramètres cosmologiques. Le travail se focalise sur l’analyse du relevé Canada-France Imaging Survey (CFIS), un relevé couvrant 5,000 deg2 de l’hémisphère Nord dans les bandes u et r. La haute résolution et la profondeur de ces données en font à ce jour un des meilleurs candidats pour l’étude de la science du lentillage gravitationnel faible. Entre autres choses, la mesure précise de la forme des galaxies nécessite une très bonne connaissance de la PSF pour laquelle une suite de tests ont été développés pour la validation. Dû au bruit, et l’utilisation d’approximations pour la mesure de formes, les résultats peuvent être biaisés. Par l’utilisation de techniques de pointe comme la Metacalibration, les biais multiplicatifs et additifs résiduels ont été réduits à m < 0.1% et c < 0.001% respectivement. Cette thèse présentera aussi le travail qui est demandé pour le développement d’une chaîne de traitements pour du lentillage gravitationnel faible, comme l’élaboration de simulations d’images très précises et représentatives des données. Nous présenterons les tests de validations réalisés pour assurer une mesure dénuée d’erreurs systématiques. Enfin, des résultats scientifiques préliminaires seront présentés pour démontrer la viabilité de la chaîne de traitements. Nous avons construit des cartes de matière noire sur une surface de 2,000 deg2. Nous avons mesuré et comparé aux prédictions théoriques le cisaillement gravitationnel tangentiel autour d’environ 50 amas. Pour conclure, nous présenterons une première analyse 3x2 points combinant le lentillage gravitationnel faible de l’étude réalisée sur CFIS et la mesure du décalage vers le rouge des galaxies des observations de eBOSS sur les 50 deg2 choisis dans le but de vérifications scientifiques
Among the big questions cosmology faces today, the nature of dark matter and dark energy are at the center of upcoming surveys. The future stage IV missions Euclid and LSST will cover a surface on the sky never reached before to unveil structures at very large scales and different epochs. Weak gravitational lensing will be one of the cosmological probes used to trace dark matter. Gravitational lensing is a physical phenomenon which uses the distortion of light to trace the presence of mass in the Universe. The interesting point of weak lensing is its sensitivity to total mass, i.e. baryonic and non-baryonic. Due to gravitational lensing, distant galaxies will appear distorted on the observed images. The measurement of the distortions induced by gravitational shear requires a very accurate estimation of the shape of galaxies. This thesis will present the data reduction pipeline built for weak lensing studies, from the telescope to cosmological parameter inference. The work focuses on the analysis of the Canada-France Imaging Survey (CFIS), a u- and r-band survey covering 5,000 deg2 in the Northern hemisphere. The high resolution and depth of those data make it one the best survey candidates for weak lensing science to date. Among other things, accurate measurement of the shape galaxies requires a very good knowledge of the PSF for which a suite of validation tests have been developed. Due to the noise, and approximations used in the shape measurement, the results can be biased. The residual multiplicative and additive biases have been reduced to m < 0.1% and c < 0.001% respectively by using state-of-art techniques such as Metacalibration. This thesis will also present the work that is required for the development of a weak lensing pipeline, such as the elaboration of highly accurate and data-representative image simulations. We will show validation tests performed to ensure systematic-free measurements. Finally, preliminary science results will be presented demonstrating the viability of the pipeline. We have constructed maps of dark matter over a surface of 2,000 deg2. We have measured tangential shear around 50 clusters and compared to theoretical predictions. To conclude, we will present a first 3x2 points analysis combining the weak lensing study performed on CFIS and the redshift measurement from eBOSS observations on the 50 deg2 chosen for science verification purposes
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Laudisio, Fulvio. "Verification and integration of the management and control software for the Near Infrared Spectrometer Photometer of the Euclid space mission". Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426230.

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The thesis comprises five chapters covering different items and phases of the work accomplished during my Ph.D program. Such work is part of the Euclid Project, a very high-profile space-based scientific mission designed to accurately measure the expansion history of the universe and the growth of cosmic structures. The first chapter is an introduction to the Euclid space mission and a description of Euclid’s scientific goals and instrumentation. The payload is a telescope that hosts two instruments capable of taking images at different wavelengths. In particular, the chapter provides a detailed description of the Near Infrared Spectrometer Photometer (NISP). The second chapter presents a detailed description of the NISP Warm Electronics (WE) with particular emphasis on the Data Processing Unit (DPU), the Instrument Control Unit (ICU), their application software (ASW), and the communication among them. The Assembly, Integration, Validation, and Testing (AIV/AIT) of such boards and the corresponding software are the main subjects of my Ph.D. study. Chapters 3, 4, and 5 which take into consideration the AIV activities and the specifically designed software tools, detail my contribution to the NISP WE AIV. The AIV of the NISP on-board software required a careful design and the development of software tools to verify functionality and performances. Great care was taken in the development of the software of the DPU test equipment controlling the interface with the DPU. I developed it in close cooperation with the NISP AIV/AIT team, the NISP-Electrical Ground Support Equipment (EGSE) team, and two industries (OHB Italia for the DPU hardware design and construction and Temis for the procurement of the DPU TE). The developed software was delivered to the industries and is now used for the validation of the DPU Electro Qualified Model (EQM) and the Flight Model (FM). Chapter 4 describes the DPU test campaign. I took part in the integration of the Application Software in the DPU board at OHB Italy and at INAF Padua. Chapter 5 illustrates the AIV/AIT activity for the validation of the NISP Avionic Model (AVM) before delivery to Thales Alenia Space Italia (TAS-I).
Questa tesi è divisa in cinque capitoli, che descrivono i diversi elementi e le fasi del lavoro svolto durante il periodo di Dottorato. Nel primo capitolo c'è un introduzione alla missione spaziale Euclid, e la descrizione dei suoi obiettivi scientifici, e degli strumenti progettati per completare la missione. Il payload della missione è un telescopio per l' osservazione dello spazio che monta due camere capaci di acquisire immagini su diverse lunghezze d'onda. In particolare è descritto lo Spettro Fotometro Infrarosso (NISP). Nel secondo capitolo c'è una dettagliata descrizione dell' elettronica che controlla il NISP. L' integrazione e i test sue queste schede elettroniche (AIV) è il principale soggetto di questo studio. Il mio contributo alle attività di AIV e la filosofia sottostante a tali attività sono descritti nel capitolo tre. È descritto il piano di test seguito e gli strumenti software sviluppati per questo scopo. Le attività Assemblaggio Integrazione e Verifica hanno richiesto una attenta progettazione di diversi software e dei metodi per verificarli. In particolare per lo sviluppo di un componente software usato nei test della DPU. Questo lavoro è stato svolto, congiuntamente ai gruppi NISP AIV/AIT e NISP EGSE e le industrie coinvolte (OHB Italia per le DPU e TEMIS per la fornitura di parte dell' equipaggiamento) ed è stato consegnato alle industrie per la validazione dei modelli di volo degli strumenti. La campagna di test della DPU è descritta nel capitolo quattro. Abbiamo contribuito all' integrazione dell' Application Software della DPU in due fasi svoltesi nei laboratori di OHB-I e nell' INAF di Padova. Nel capitolo cinque sono descritte le attività di AIV svolte per la validazione del modello AVM del NISP che doveva essere completata prima della consegna dello strumento a Thales Alenia Space.
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Holmes, Rory [Verfasser], e Hans-Walter [Akademischer Betreuer] Rix. "The Near-Infrared Imaging Channel for the Euclid Dark Energy Mission : Development of Critical Opto-Mechanical Components and an Instrument Calibration Concept / Rory Holmes ; Betreuer: Hans-Walter Rix". Heidelberg : Universitätsbibliothek Heidelberg, 2012. http://d-nb.info/1179783336/34.

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Silvi, Andrea. "Cosmologia con missione spaziale "Euclid"". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7691/.

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Nel 2020 verrà lanciata la missione spaziale Euclid per investigare la natura dell’energia oscura. Euclid otterrà un’immensa quantità di dati fotometrici e spettrometrici finalizzati, soprattutto, alla misura di lenti gravitazionali deboli e oscillazioni acustiche barioniche. In questa tesi daremo una descrizione generale dello strumento e della scienza che potrà essere fatta grazie ad esso. In particolare, nel capitolo 2 verrà fornita una introduzione alla cosmologia e verranno introdotti i vari parametri cosmologici che Euclid sarà in grado di vincolare. Nel capitolo 3 si farà un’analisi dei principali fenomeni fisici che Euclid indagherà. Nel capitolo 4 verrà data una panoramica del satellite, descrivendo in dettaglio gli obiettivi, cosa osserverà e come farà le osservazioni, e quali sono gli strumenti che lo compongono (satellite, telescopio, VIS e NISP). Infine, nel capitolo 5 verranno mostrati dei primi risultati preliminari, ottenuti in questa tesi, riguardanti il test di un programma che servirà per la misura della funzione di correlazione a due punti di Euclid.
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Livros sobre o assunto "Euclid mission"

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1947-, Lo Bello Anthony, e Arnzen Rüdiger, eds. The commentary of al-Nayrizi on Books II-IV of Euclid's Elements of Geometry: With a translation of that portion of Book I missing from ms Leiden or. 399.1 but present in the newly discovered Qom manuscript edited by Rudiger Arnzen. Leiden: Brill, 2009.

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Ridpath, Ian, ed. A Dictionary of Astronomy. Oxford University Press, 2018. http://dx.doi.org/10.1093/acref/9780191851193.001.0001.

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‘An enormous amount of obscure data is satisfactorily explained here’ Times Literary SupplementOver 4,300 entriesCompiled with the help of a team of expert contributors under the editorship of renowned author and broadcaster Ian Ridpath, the third edition of this dictionary covers everything from space exploration and the equipment involved to astrophysics, cosmology, and the concept of time. The dictionary also includes biographical entries on eminent astronomers, as well as worldwide coverage of observatories and telescopes. Supplementary material is included in the appendices, such as tables of Apollo lunar landing missions, the constellations, and planetary data, and numerous other tables and diagrams complement the entries.The entries have been fully revised and updated for this edition, and around ninety new entries have been added to reflect the recent developments within the field of astronomy, including Bennu, Euclid, Mars Orbiter Mission, and slowly pulsating B star.A Dictionary of Astronomy is an invaluable reference source for students, professionals, amateur astronomers, and space enthusiasts.
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Lackner, Dan, Alice Roman Lackner e Rene Leighty. Adventures of Euclid: The Missing Sailor. Self Employed, 2022.

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Bello, Anthony Lo. Commentary of Al-Nayrizi on Books II-IV of Euclid's Elements of Geometry: With a Translation of That Portion of Book I Missing from MS Leiden or. 399. 1 but Present in the Newly Discovered Qom Manuscript Edited by Rüdiger Arnzen. Ebsco Publishing, 2009.

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Capítulos de livros sobre o assunto "Euclid mission"

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Balcells, M. "The EUCLID–NIS Mission". In Astrophysics and Space Science Proceedings, 469. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11250-8_131.

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Bucciarelli, B., R. Drimmel, M. G. Lattanzi, R. L. Smart, A. Spagna, A. Bacchetta e A. Bosco. "The Construction of a Reference Star Catalog for the Euclid Mission". In Astrophysics and Space Science Proceedings, 101–4. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19330-4_15.

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Colodro-Conde, Carlos, Rafael Toledo-Moreo, José Javier Díaz-García, Óscar Manuel Tubío-Araujo, Isidro Villó-Pérez, Fco Javier Toledo-Moreo, José Javier Martínez-Álvarez, Fco Javier Garrigós-Guerrero, José Manuel Ferrández-Vicente e Rafael Rebolo. "Analysis of Connection Schemes between the ICU and the DPU of the NISP Instrument of the Euclid Mission". In Natural and Artificial Computation in Engineering and Medical Applications, 385–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38622-0_40.

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"Activities of the International Space Organization and Station". In Advances in Public Policy and Administration, 140–52. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7407-2.ch014.

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This chapter describes the establishment process, purpose of establishment, mission, exploration plan, activities of the European Space Agency (ESA) and International Space Station (ISS), and an explanation of the contents of the treaty that is legal basis for its establishment. The European Space Agency (ESA) is an intergovernmental organization of 22 member states dedicated to the exploration of space. Established in 1975 and headquartered in Paris, France, ESA has a worldwide staff of about 2,200 in 2018 and an annual budget of about € 6.68 billion (US $ 7.43 billion) in 2020. ESA also works closely with space organizations outside Europe. ESA has missions planned for Jupiter (JUICE, 2022) and others that will seek dark matter (Euclid, 2020) and observe the energetic universe (Athena, 2028). The International Space Station (ISS) is a space station (habitable artificial satellite) in low Earth orbit. The ISS programme is a joint project between five participating space agencies: NASA (United States), Roscomos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada).
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Tacconelli, Evelina, e Bojana Beović. "Missions and Objectives of EUCIC and ESGAP". In Antimicrobial Stewardship, 239–41. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-810477-4.00036-2.

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Torres, Cinthya. "Contested Frontiers: Territory and Power in Euclides da Cunha’s Amazonian Texts". In Intimate Frontiers, 67–87. Liverpool University Press, 2019. http://dx.doi.org/10.3828/liverpool/9781786941831.003.0004.

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This essay explores the political and discursive mechanisms Brazilian writer Da Cunha employs to build a historical past for Brazil in the Amazon, while simultaneously discrediting Bolivia and Peru’s territorial demands on the Acre region in Amazonia. Building his argument on boundary-making history, cartographical data, and nationalistic feelings, Torres argues that Da Cunha crafts a compelling case for Brazil’s rightful purchase of Acre and expansion of its frontiers in two ways. Firstly, Da Cunha identifies the value of the Amazon, whether as a political, economic, or even symbolic capital that can be utilized to lay the grounds for a diplomatic defense, and therefore lawfulness of their territorial claims. Secondly, Torres goes on to argue that Da Cunha is aware of the decisive nature of his mission for the mapping of a terrain visited only by local Indians and Peruvian rubber tappers. This consciousness leads him to compose a history for Brazil in the Amazon with the intention of nationalizing the territory; in other words, to turn an abstract and alien place into one concrete narrative in which the uprooted nation is reunited and homogenized under a common and shared identity.
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"Chapter One. The Portion Of Book I Of The Elements Missing From Ms Leiden 399.1 But Present In Ms Qom 5365, According To The Edition Of Rüdiger Arnzen". In The Commentary of al-Nayrizi on Books II-IV of Euclid's Elements of Geometry, 1–19. BRILL, 2009. http://dx.doi.org/10.1163/ej.9789004173897.i-218.6.

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Trabalhos de conferências sobre o assunto "Euclid mission"

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Tuttle, Sean, L. Vaillon, Ulrich Johann, Oswald Wallner e Klaus Ergenzinger. "EUCLID mission design". In International Conference on Space Optics 2010, editado por Naoto Kadowaki. SPIE, 2017. http://dx.doi.org/10.1117/12.2309226.

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Laureijs, R., G. Racca, L. Stagnaro, J. C. Salvignol, J. Lorenzo Alvarez, G. Saavedra Criado, L. Gaspar Venancio et al. "Euclid mission status". In SPIE Astronomical Telescopes + Instrumentation, editado por Jacobus M. Oschmann, Mark Clampin, Giovanni G. Fazio e Howard A. MacEwen. SPIE, 2014. http://dx.doi.org/10.1117/12.2054883.

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Laureijs, René J., Ludovic Duvet, Isabel Escudero Sanz, Philippe Gondoin, David H. Lumb, Tim Oosterbroek e Gonzalo Saavedra Criado. "The Euclid Mission". In SPIE Astronomical Telescopes + Instrumentation, editado por Jacobus M. Oschmann, Jr., Mark C. Clampin e Howard A. MacEwen. SPIE, 2010. http://dx.doi.org/10.1117/12.857123.

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Conversi, L. "The Euclid mission". In Proceedings of the MG14 Meeting on General Relativity. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226609_0226.

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Wallner, Oswald, Klaus Ergenzinger, Ludovic H. Vaillon e Rainer C. Wilhelm. "EUCLID mission baseline design". In International Conference on Space Optics 2012, editado por Errico Armandillo, Nikos Karafolas e Bruno Cugny. SPIE, 2017. http://dx.doi.org/10.1117/12.2309034.

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Lumb, David, Ludovic Duvet, Renee Laurijs, Maurice Te Plate, Isabel Escudero Sanz e Gonzalo Saavedra Criado. "Euclid Mission: assessment study". In SPIE Optical Engineering + Applications, editado por Howard A. MacEwen e James B. Breckinridge. SPIE, 2009. http://dx.doi.org/10.1117/12.825279.

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Racca, Giuseppe D., René Laureijs, Luca Stagnaro, Jean-Christophe Salvignol, José Lorenzo Alvarez, Gonzalo Saavedra Criado, Luis Gaspar Venancio et al. "The Euclid mission design". In SPIE Astronomical Telescopes + Instrumentation, editado por Howard A. MacEwen, Giovanni G. Fazio, Makenzie Lystrup, Natalie Batalha, Nicholas Siegler e Edward C. Tong. SPIE, 2016. http://dx.doi.org/10.1117/12.2230762.

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Laureijs, René J., Giuseppe Racca, Y. Mellier, P. Musi, L. Brouard, Tobias Boenke, Luis M. Gaspar Venancio et al. "Euclid mission status after mission critical design". In Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, editado por Makenzie Lystrup, Natalie Batalha, Edward C. Tong, Nicholas Siegler e Marshall D. Perrin. SPIE, 2020. http://dx.doi.org/10.1117/12.2563145.

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Vavrek, Roland D., René J. Laureijs, Jose Lorenzo Alvarez, Jérôme Amiaux, Yannick Mellier, Ruyman Azzollini, Guillermo Buenadicha et al. "Mission-level performance verification approach for the Euclid space mission". In SPIE Astronomical Telescopes + Instrumentation, editado por George Z. Angeli e Philippe Dierickx. SPIE, 2016. http://dx.doi.org/10.1117/12.2233015.

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Renzi, Alessandro. "STATUS AND PERSPECTIVES OF THE EUCLID MISSION". In Nineteenth Lomonosov Conference on Elementary Particle Physics. WORLD SCIENTIFIC, 2021. http://dx.doi.org/10.1142/9789811233913_0082.

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