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In images collected by astronomical surveys, stars and galaxies often overlap visually. Deblending is the task of distinguishing and characterizing individual light sources in survey images. We propose StarNet, a Bayesian method to deblend…

Instrumentation and Methods for Astrophysics · Physics 2023-08-30 Runjing Liu , Jon D. McAuliffe , Jeffrey Regier

Getting good performance out of numerical equation solvers requires that the user has provided stable and efficient functions representing their model. However, users should not be trusted to write good code. In this manuscript we describe…

Mathematical Software · Computer Science 2022-02-10 Yingbo Ma , Shashi Gowda , Ranjan Anantharaman , Chris Laughman , Viral Shah , Chris Rackauckas

We present an algorithm that can detect blends of bright stars with fainter, un-associated eclipsing binaries. Such systems contaminate searches for transiting planets, in particular in crowded fields where blends are common. Spectroscopic…

Astrophysics · Physics 2009-11-10 Henk Hoekstra , Yanqin Wu , Andrzej Udalski

We introduce a new clustering algorithm, MulGuisin (MGS), that can identify distinct galaxy over-densities using topological information from the galaxy distribution. This algorithm was first introduced in an LHC experiment as a Jet Finder…

Instrumentation and Methods for Astrophysics · Physics 2024-02-20 Young Ju , Inkyu Park , Cristiano G. Sabiu , Sungwook E. Hong

Multimodal large language models (MLLMs) have achieved remarkable progress on various vision-language tasks, yet their visual perception remains limited. Humans, in comparison, perceive complex scenes efficiently by dynamically scanning and…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Yuchen Feng , Zhenyu Zhang , Naibin Gu , Yilong Chen , Peng Fu , Zheng Lin , Shuohuan Wang , Yu Sun , Hua Wu , Weiping Wang , Haifeng Wang

The Core Cosmology Library (CCL) provides routines to compute basic cosmological observables to a high degree of accuracy, which have been verified with an extensive suite of validation tests. Predictions are provided for many cosmological…

We describe a new open source package for calculating properties of galaxy clusters, including NFW halo profiles with and without the effects of cluster miscentering. This pure-Python package, cluster-lensing, provides well-documented and…

Instrumentation and Methods for Astrophysics · Physics 2016-12-14 Jes Ford , Jake VanderPlas

We employ the method used by the GW-Universe Toolbox to generate a synthetic catalogue of detection of stellar mass binary black hole (BBH) mergers. We study advanced LIGO (aLIGO) and Einstein Telescope (ET) as two representatives for the…

High Energy Astrophysical Phenomena · Physics 2022-08-03 Shu-Xu Yi , Fiorenzo Stoppa , Gijs Nelemans , Eric Cator

State-of-the-art object detectors are treated as black boxes due to their highly non-linear internal computations. Even with unprecedented advancements in detector performance, the inability to explain how their outputs are generated limits…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Deepan Chakravarthi Padmanabhan , Paul G. Plöger , Octavio Arriaga , Matias Valdenegro-Toro

In the last years, Astroinformatics has become a well defined paradigm for many fields of Astronomy. In this work we demonstrate the potential of a multidisciplinary approach to identify globular clusters (GCs) in the Fornax cluster of…

We present the GalMer database, a library of galaxy merger simulations, made available to users through tools compatible with the Virtual Observatory (VO) standards adapted specially for this theoretical database. To investigate the physics…

Instrumentation and Methods for Astrophysics · Physics 2015-05-18 Igor Chilingarian , Paola Di Matteo , Francoise Combes , Anne-Laure Melchior , Benoit Semelin

We investigate the quality of associations of astronomical sources from multi-wavelength observations using simulated detections that are realistic in terms of their astrometric accuracy, small-scale clustering properties and selection…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Sebastien Heinis , Tamas Budavari , Alexander S. Szalay

Due to the unprecedented depth of the upcoming ground-based Legacy Survey of Space and Time (LSST) at the Vera C. Rubin Observatory, approximately two-thirds of the galaxies are likely to be affected by blending - the overlap of physically…

Instrumentation and Methods for Astrophysics · Physics 2025-09-10 Biswajit Biswas , Eric Aubourg , Alexandre Boucaud , Axel Guinot , Junpeng Lao , Cécile Roucelle , the LSST Dark Energy Science Collaboration

We present a new probabilistic method for detecting, deblending, and cataloging astronomical sources called the Bayesian Light Source Separator (BLISS). BLISS is based on deep generative models, which embed neural networks within a Bayesian…

Instrumentation and Methods for Astrophysics · Physics 2022-07-13 Derek Hansen , Ismael Mendoza , Runjing Liu , Ziteng Pang , Zhe Zhao , Camille Avestruz , Jeffrey Regier

Bulge-disk (B-D) decomposition is an effective diagnostic to characterize the galaxy morphology and understand its evolution across time. So far, high-quality data have allowed detailed B-D decomposition to redshift below 0.5, with limited…

Triumvirate is a Python/C++ package for measuring the three-point clustering statistics in large-scale structure (LSS) cosmological analyses. Given a catalogue of discrete particles (such as galaxies) with their spatial coordinates, it…

Instrumentation and Methods for Astrophysics · Physics 2023-11-10 Mike Shengbo Wang , Florian Beutler , Naonori S. Sugiyama

We present a new algorithm for identifying superbubbles in HI column density maps of both observed and simulated galaxies that has only a single adjustable parameter. The algorithm includes an automated galaxy-background separation step to…

Astrophysics of Galaxies · Physics 2024-09-19 Brock Wallin , Benjamin D. Wibking , G. Mark Voit

We present DLTK, a toolkit providing baseline implementations for efficient experimentation with deep learning methods on biomedical images. It builds on top of TensorFlow and its high modularity and easy-to-use examples allow for a…

Computer Vision and Pattern Recognition · Computer Science 2017-11-21 Nick Pawlowski , Sofia Ira Ktena , Matthew C. H. Lee , Bernhard Kainz , Daniel Rueckert , Ben Glocker , Martin Rajchl

swdatatoolkit is a Python-based scientific software library designed to support the acquisition, preprocessing, and analysis of solar and space weather data. The toolkit consolidates functionality across multiple domains, including data…

Instrumentation and Methods for Astrophysics · Physics 2026-04-27 Dustin Kempton , Griffin Goodwin , Tarun Kumar Reddy Thippareddy , Reet Gupta , Viacheslav Sadykov , Rafal Angryk

The distinction between stars and galaxies is a fundamental problem in the field of celestial classification. This issue has become challenging for these ongoing and upcoming digital surveys, which will produce terabytes and even petabytes…

Instrumentation and Methods for Astrophysics · Physics 2026-04-14 Zhuoming Han , Tianmeng Zhang , Chao Liu , Chenxiaoji Ling