Search Results for author: Bastien Arcelin

Found 2 papers, 1 papers with code

A Bayesian Convolutional Neural Network for Robust Galaxy Ellipticity Regression

no code implementations20 Apr 2021 Claire Theobald, Bastien Arcelin, Frédéric Pennerath, Brieuc Conan-Guez, Miguel Couceiro, Amedeo Napoli

We show that while a convolutional network can be trained to correctly estimate well calibrated aleatoric uncertainty, -- the uncertainty due to the presence of noise in the images -- it is unable to generate a trustworthy ellipticity distribution when exposed to previously unseen data (i. e. here, blended scenes).

regression

Deblending galaxies with Variational Autoencoders: a joint multi-band, multi-instrument approach

1 code implementation25 May 2020 Bastien Arcelin, Cyrille Doux, Eric Aubourg, Cécile Roucelle

The apparent superposition of galaxies with other astrophysical objects along the line of sight, a problem known as blending, will be a major challenge for upcoming, ground-based, deep, photometric galaxy surveys, such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST).

Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics

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