Présidents de session
Présentations appel à contributions / Accepted contributions: SNela
- Celine Combet (LPSC - Grenoble)
Présentations appel à contributions / Accepted contributions: Computing et outils (ML, Broker, DC2, etc.)
- Fabio Hernandez (CC-IN2P3)
Présentations appel à contributions / Accepted contributions: Calibration, des pixels aux catalogues (PSF, deblending, etc.)
- Mickael Rigault (IP2I)
Présentations appel à contributions / Accepted contributions: Clusters
- Celine Combet (LPSC - Grenoble)
Présentations appel à contributions / Accepted contributions: LSS, cosmic shear
- Gaëlle SHIFRIN (Centre de Calcul de l'IN2P3)
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Mathew Smith (IP2I/IN2P3/CNRS)04/11/2020 10:00
Measurements of the standardisable type Ia supernova (SNeIa) out to the earliest epochs in the Universe remain the most robust probe of cosmic acceleration. However, to ensure unbiased precision estimates on the nature of dark energy requires a firm understanding of where the observed 0.15mag dispersion observed in these events originates from, and a detailed description of any evolution in...
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Philippe Rosnet (Université Blaise Pascal - CNRS/IN2P3)04/11/2020 10:20
The galaxy morphology is a way to characterize the Type Ia supernova (SN Ia) environnement. In this talk, first, the correlation between the galaxy morphology and other tracers of SN Ia environnment will be addressed. In a second part, the study of the dependency of SALT2 light curve parameters with respect to the galaxy morphology from the Pantheon compilation will be presented, as well as...
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Nora NICOLAS (CNRS IN2P3 IP2I)04/11/2020 10:35
The true nature of type Ia supernovae (SNe Ia) remains largely unknown, and as survey statistics increase, the question of astrophysical systematic uncertainties rises, notably that of the SN Ia population evolution. In this paper, we study the dependence with redshift of the SN Ia SALT2.4 lightcurve stretch, a purely intrinsic SN property, to probe its potential redshift drift. The SN stretch...
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Dr Emille Ishida (LPC-UCA)04/11/2020 10:50
The RESSPECT project (Recommendation System for Spectroscopic Follow-up) aims to develop a pipeline which can guide the construction of optimal training samples for photometric supernova cosmology. The project has a little more than a year and it is now in its final development stages. I will give a brief overview of the purpose of the project, its current configuration, the remaining steps to...
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04/11/2020 11:10
discussion about the organisation of the SNIa activities within the IN2P3
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Dominique Boutigny (LAPP)04/11/2020 14:00
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Anais Moller (CNRS / LPC Clermont)04/11/2020 14:30
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Alexandre Boucaud (APC / IN2P3)04/11/2020 14:55
In this presentation I will attempt to make an overview of the current state of machine learning in the French LSST community (applications, techniques, available hardware and knowledge, etc.) and start a discussion on the various opportunities that could be adopted forward or actions undertaken.
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Benjamin Racine04/11/2020 15:20
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Pierre-Francois Leget (LPNHE)05/11/2020 10:00
Atmospheric turbulence is one of the significant problems to get unbiased flux and shape measurement on a ground-based experiment as the Vera Rubin Observatory. Indeed, atmospheric turbulences is one of the main arguments to get an unbiased flux and shape from space as Euclid will do. In this talk, I’ll present one solution to take into account Atmospheric turbulences for the current...
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Melissa Amenouche (Laboratoire de Physique de Clermont)05/11/2020 10:20
The Zwicky Transient Facility (ZTF) has started observing transient objects since 2018 for six years. The goal of the survey is to reach a sample of 6000 Type Ia Supernovas to probe the nearby Universe. With the actual calibration pipeline, ZTF is reaching 15 mmag of precision. Efforts have being deployed within the collaboration to imporve the precision and reach the mmag level. One of the...
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Manal YASSINE ({CNRS}UMR7346)05/11/2020 10:35
We process HSC data using LSST software with the aim on detecting SN in the HSC transient survey. Currently, we are studying the efficiency of SN detection. To do so, we add fakes around the galaxies of a bunch of visits, and others with arbitrary positions. I will present the progress done in this work with the perspectives.
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Jérémy Neveu (LAL)05/11/2020 10:50
Update on the recent developments of Spectractor to get accurate atmospheric transmission curves with AuxTel.
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Marc Betoule (LPNHE)05/11/2020 11:10
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05/11/2020 11:30
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Michel Aguena (LAPP)05/11/2020 14:00
We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP), that searches for clusters in wavelet-based density maps of galaxies selected in photometric redshift space without any assumption on the cluster galaxy populations. This cluster finder was applied to DES first year (Y1A1) data, where the results were compared to clusters detected...
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Constantin Payerne (LPSC)05/11/2020 14:20
I will present my work on the analysis of DC2 catalogs for weak-lensing mass determination of galaxy clusters, for cluster count cosmology application. Among others, the objectives were to test the cosmoDC2_v1.1.4_image catalog for W.L. mass reconstruction (as an ideal galaxy catalog), and after to study the effect of image deterioration of a sky survey on the cluster mass, due to the presence...
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Marina Ricci (LAPP)05/11/2020 14:40
I this presentation I will introduce the use of the gravitational magnification effect as a complementary probe to constrain the weak lensing mass of galaxy clusters in the LSST. I will explain the methodology, its advantages and show preliminary results on the DESC DC2 simulation.
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Marina Ricci (LAPP)05/11/2020 15:00
In this talk I will introduce the "Baryon Pasting" project that aims at developing simple and physically motivated methods to model the properties of galaxies, groups, clusters and the cosmic web. The goal is to maximize the scientific returns of multi-wavelength surveys and concerns cluster cosmology but also weak lensing and galaxy clustering analyses. I will focus on the current efforts to...
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Pierre-Francois Leget (LPNHE)05/11/2020 15:20
In this talk, I’ll present in the first part some current work of testing General relativity using current cosmic shear data. Moreover, I’ll present some perspective of doing the same job using VRO data.
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stephane plaszczynski (CNRS)05/11/2020 15:40
je presenterai un nouvel algorthme pour le pipeline TXPIPE (3x2pts) qui permet de traiter la combinatoire du comptage de paires pour les donnees LSST
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Anais Moller (CNRS / LPC Clermont)
The Vera Rubin Observatory Legacy Survey of Space and Time (LSST) will provide an unprecedented volume of time-domain data opening a new era of optical big data in astronomy. To fully harness the power of LSST, new methods must be developed to deal with large data volumes and to coordinate resources for follow-up of promising candidates. In this talk I will present Fink, a broker developed to...
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