LE BILAN FINAL DE COROT

L’équipe CoRoT vient de rendre public l’ensemble des données produites par la mission. Cet évènement concrétise un travail de plusieurs années, au cours duquel elle a réussi à interpréter et à filtrer les principaux artéfacts produits par l’instrument et le satellite qui contaminaient le signal astrophysique recherché.

Il s’agit entre autres de supprimer le problème particulièrement aigu des pics de signal et des discontinuités induits par le bombardement des particules cosmiques, de corriger le vieillissement de l’instrument et les biais systématiques sur les détecteurs.

 

illustration_correction_4

Illustration des corrections sur une étoile faible (mV=15.6, 150 jours).

Les courbes de lumière (séries temporelles de mesure de flux stellaire) de plus de 160 000 étoiles de notre galaxie sont désormais à disposition de l’ensemble de la communauté scientifique internationale via l’archive CoRoT de la mission, le Centre de Données astronomiques de Strasbourg ainsi que deux sites miroirs aux Etats-Unis et en Espagne.

Elles constituent une mine d’or pour l’étude des exoplanètes, des étoiles, de la structure de notre Galaxie et, au delà, toutes les recherches basées sur la photométrie stellaire ultra précise.

Ces données contribuent ainsi à la préparation des futures grandes missions spatiales, en particulier PLATO, le successeur européen de CoRoT.

L’ouvrage « The CoRoT Legacy book » décrivant ces données et les méthodes utilisées, les principaux résultats à ce jour et les nouveaux projets héritiers de CoRoT sera très prochainement publié.

Contact :
Sylviane Chaintreuil, LESIA, sylviane.chaintreuil@obspm.fr, 01 45 07 77 33

Une réflexion sur “ LE BILAN FINAL DE COROT ”

  • 7 octobre 2017 à 1 h 21 min
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    ?Essay composing
    At university, students’ learning is often assessed primarily through written perform. Students may also be asked to make oral presentations or display their knowledge through a poster but the emphasis is on written assignments like as essays, reports and examinations. These crafting tasks are intended by lecturers to help students learn to think about the social and physical world in particular ways. Although certain ways of thinking are generally valued by academics across the university it is important to remember that each individual discipline has its possess conditions and expectations attached to written tasks.
    In their professional lives very couple people, except academics, craft essays. However, at university they are a single on the most commonplace composing tasks. Essays are widely utilised by academics considering that they are a superior way of assessing students’ thinking skills and in particular what we call ‘higher order’ thinking skills. Essays enable students the opportunity to demonstrate their understanding within the material they have been taught. They require the ability to see relationships amongst concepts and to impose a rational structure on material gathered from the assortment of different resources.
    An essay must have an argument
    A student essay at university can be an extended piece of creating which presents an argument in accordance with active research. An argument is made up of the thesis statement (PDF 76KB). which is usually placed on the conclusion on the introduction, and also a list of main points .
    The thesis statement (PDF 76KB) is the foremost important sentence within the essay. It tells the reader the position taken in response to the question or task. The thesis statement is often introduced with the words, ‘This essay will argue …’ or ‘In this essay I will argue …’ (Note that this is just one belonging to the several instances in which the very first person is second hand in academic composing). A thesis statement always asserts something. It is increased a description of what the essay will do. ‘This essay will outline the major factors responsible for unemployment in contemporary Australia’ shouldn’t be a thesis statement on the grounds that it does not assert anything. ‘This essay will argue that government policy is the major cause of unemployment in contemporary Australia,’ could be a thesis statement considering it states a position. The rest in the essay must then demonstrate research into unemployment that supports this assertion.
    Composing the introduction
    An essay is written to convince the reader that the argument it includes is intellectually justifiable. The reader is probably the most important person inside of the essay crafting system and this is reflected with the introduction (PDF 153KB) which must deliver the reader using an incentive to look at the essay, a clear and detailed map of what is within the essay including a statement of your writer’s position.
    To attain these functions, your essays should have the following parts:
    begin with a particular or two sentences which draw the reader into the essay by stating the importance within the topic or issue. Giving historical background is an individual way of doing this. If the essay will only deal with some aspects of the topic it is usual to tell the reader. This shows you have a broad understanding from the issue but can only deal with part of it in the restricted house of the student paper.
    the next group of sentences from the introduction established out the main point that may be put into use to service the thesis statement. Each individual 1 is usually dealt with inside of a separate sentence rather than crowded together in the list.
    the last sentence is usually the thesis statement.
    Two sample essay introductions with self-tests (PDF 153KB) demonstrate the factors of an effective introduction inside a step-by-step style.
    Main points and paragraph structure
    Essays are crafted up of the series of paragraphs (two.25MB) which all contribute to establishing the writer’s purpose. At university, paragraphs are the fundamental unit or setting up block of extended pieces of producing.
    Successful essays depend upon putting together up the overall structure, through paragraphs which have a clearly identified main point. The main points with the paragraphs are the main points outlined around the introduction. A paragraph in academic producing frequently consists of the main idea which is explained, amplified, supported and usually illustrated. Paragraphs in formal university function are characterised by increasing specificity. Which is they move from the general to the unique thus increasingly refining the reader’s understanding.
    The following paragraph demonstrates these points. The sentence in italics states the main point. The sentences in normal font amplify and explain the point as well as sentences in bold assist the point by providing evidence.
    Australia is really a society where economic inequality is pervasive and deeply entrenched. Familiar generalisations about Australia’s unique ‘egalitarianism’ do not match with the factual picture. The social dynamics at job, and also the degrees of inequality resulting, are quite a bit the same as are found in North America, Western Europe, and middle ranking capitalist economies elsewhere. For example studies of income and wealth distribution reveal that the top 20% of Australians hold 72% with the wealth (Dilnot, 1990) along with the top 10% of households acquire 40% of total income (Raskall, 1993).
    A familiar structure for paragraphs in academic creating is as follows:
    Main Point – the main idea with the paragraph is expressed as a generalisation
    Explanation, Amplification – the main idea is elaborated and its meaning explained
    Illustration – the main idea is illustrated or supported by example, facts or quote.
    Creating conclusions
    Finally a awesome essay has a summary which restates the argument, reminds the reader in the two or three points which offer you one of the most important assistance for that argument and then draws the essay to your close.

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