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If a gravitational wave event is lensed by a cluster or galaxy in our line-of-sight, it is expected that its host galaxy would also be lensed. Therefore, connecting lensed gravitational wave events even without direct optical counterpart…

High Energy Astrophysical Phenomena · Physics 2026-03-11 Laura Uronen , Tian Li , Justin Janquart , Hemanta Phurailatpam , Jason Poon , Thomas Collett , Leon Koopmans , Otto Hannuksela

We present the pulsar_spectra software repository, an open-source pulsar flux density catalogue and automated spectral fitting software that finds the best spectral model and produces publication-quality plots. The Python-based software…

High Energy Astrophysical Phenomena · Physics 2022-11-09 N. A. Swainston , C. P. Lee , S. J. McSweeney , N. D. R. Bhat

The rapid growth in scale and complexity of both computational and observational astrophysics over the past decade necessitates efficient and intuitive methods for examining and visualizing large datasets. Here, I present {\it AstroBlend},…

Instrumentation and Methods for Astrophysics · Physics 2016-02-11 J. P. Naiman

We discuss the LensClean algorithm which for a given gravitational lens model fits a source brightness distribution to interferometric radio data in a similar way as standard Clean does in the unlensed case. The lens model parameters can…

Astrophysics · Physics 2016-08-30 O. Wucknitz

Strong gravitational lensing provides a wealth of astrophysical information on the baryonic and dark matter content of galaxies. It also serves as a valuable cosmological probe by allowing us to measure the Hubble constant independently of…

Astrophysics of Galaxies · Physics 2021-03-31 A. Galan , A. Peel , R. Joseph , F. Courbin , J. -L. Starck

We describe a general purpose method to reconstruct the intrinsic properties of sources lensed by the gravitational potential of foreground clusters of galaxies. The tool Lenstruction is implemented in the publicly available multi-purpose…

Astrophysics of Galaxies · Physics 2020-11-30 Lilan Yang , Simon Birrer , Tommaso Treu

Gravitational lensing is now widely and successfully used to study a range of astronomical phenomena, from individual objects, like galaxies and clusters, to the mass distribution on various scales, to the overall geometry of the Universe.…

Astrophysics · Physics 2007-05-23 Liliya L. R. Williams , Paul L. Schechter

Deflection of light by gravity was predicted by General Relativity and observationaly confirmed in 1919. In the following decades various aspects of the gravitational lens effect were explored theoretically, among them the possibility of…

Astrophysics · Physics 2015-06-24 Joachim Wambsganss

The Astropy Project supports and fosters the development of open-source and openly-developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project is the core package…

Instrumentation and Methods for Astrophysics · Physics 2022-09-07 The Astropy Collaboration , Adrian M. Price-Whelan , Pey Lian Lim , Nicholas Earl , Nathaniel Starkman , Larry Bradley , David L. Shupe , Aarya A. Patil , Lia Corrales , C. E. Brasseur , Maximilian Nöthe , Axel Donath , Erik Tollerud , Brett M. Morris , Adam Ginsburg , Eero Vaher , Benjamin A. Weaver , James Tocknell , William Jamieson , Marten H. van Kerkwijk , Thomas P. Robitaille , Bruce Merry , Matteo Bachetti , H. Moritz Günther , Thomas L. Aldcroft , Jaime A. Alvarado-Montes , Anne M. Archibald , Attila Bódi , Shreyas Bapat , Geert Barentsen , Juanjo Bazán , Manish Biswas , Médéric Boquien , D. J. Burke , Daria Cara , Mihai Cara , Kyle E Conroy , Simon Conseil , Matthew W. Craig , Robert M. Cross , Kelle L. Cruz , Francesco D'Eugenio , Nadia Dencheva , Hadrien A. R. Devillepoix , Jörg P. Dietrich , Arthur Davis Eigenbrot , Thomas Erben , Leonardo Ferreira , Daniel Foreman-Mackey , Ryan Fox , Nabil Freij , Suyog Garg , Robel Geda , Lauren Glattly , Yash Gondhalekar , Karl D. Gordon , David Grant , Perry Greenfield , Austen M. Groener , Steve Guest , Sebastian Gurovich , Rasmus Handberg , Akeem Hart , Zac Hatfield-Dodds , Derek Homeier , Griffin Hosseinzadeh , Tim Jenness , Craig K. Jones , Prajwel Joseph , J. Bryce Kalmbach , Emir Karamehmetoglu , Mikołaj Kałuszyński , Michael S. P. Kelley , Nicholas Kern , Wolfgang E. Kerzendorf , Eric W. Koch , Shankar Kulumani , Antony Lee , Chun Ly , Zhiyuan Ma , Conor MacBride , Jakob M. Maljaars , Demitri Muna , N. A. Murphy , Henrik Norman , Richard O'Steen , Kyle A. Oman , Camilla Pacifici , Sergio Pascual , J. Pascual-Granado , Rohit R. Patil , Gabriel I Perren , Timothy E. Pickering , Tanuj Rastogi , Benjamin R. Roulston , Daniel F Ryan , Eli S. Rykoff , Jose Sabater , Parikshit Sakurikar , Jesús Salgado , Aniket Sanghi , Nicholas Saunders , Volodymyr Savchenko , Ludwig Schwardt , Michael Seifert-Eckert , Albert Y. Shih , Anany Shrey Jain , Gyanendra Shukla , Jonathan Sick , Chris Simpson , Sudheesh Singanamalla , Leo P. Singer , Jaladh Singhal , Manodeep Sinha , Brigitta M. Sipőcz , Lee R. Spitler , David Stansby , Ole Streicher , Jani Šumak , John D. Swinbank , Dan S. Taranu , Nikita Tewary , Grant R. Tremblay , Miguel de Val-Borro , Samuel J. Van Kooten , Zlatan Vasović , Shresth Verma , José Vinícius de Miranda Cardoso , Peter K. G. Williams , Tom J. Wilson , Benjamin Winkel , W. M. Wood-Vasey , Rui Xue , Peter Yoachim , Chen ZHANG , Andrea Zonca

Gravitational lensing is the relativistic effect generated by massive bodies, which bend the space-time surrounding them. It is a deeply investigated topic in astrophysics and allows validating theoretical relativistic results and studying…

Instrumentation and Methods for Astrophysics · Physics 2023-06-26 Nicolò Oreste Pinciroli Vago , Piero Fraternali

SkyPy is an open-source Python package for simulating the astrophysical sky. It comprises a library of physical and empirical models across a range of observables and a command-line script to run end-to-end simulations. The library provides…

We describe a series of new applications of gravitational lenses as astrophysical and cosmological tools. Such applications are becoming possible thanks to advances in the quality and quantity of observations. CASTLES…

Weak gravitational lensing is a widely used probe in cosmological analysis. It allows astrophysists to understand the content and evolution of the Universe. We are entering an era where we are not limited by the data volume but by…

Instrumentation and Methods for Astrophysics · Physics 2026-03-20 Axel Guinot , Rachel Mandelbaum

Astrometry -- the precise measurement of positions and motions of celestial objects -- has emerged as a promising avenue for characterizing the dark matter population in our Galaxy. By leveraging recent advances in simulation-based…

Cosmology and Nongalactic Astrophysics · Physics 2022-01-06 Siddharth Mishra-Sharma

Gravitational lensing - the deflection of light rays by gravitating matter - has become a major tool in the armoury of the modern cosmologist. Proposed nearly a hundred years ago as a key feature of Einstein's theory of General Relativity,…

Cosmology and Nongalactic Astrophysics · Physics 2016-06-29 Tommaso Treu , Richard S. Ellis

Spectropolarimetry, the observation of polarization and intensity as a function of wavelength, is a powerful tool in stellar astrophysics. It is particularly useful for characterizing stars and circumstellar material, and for tracing the…

We present astroplan - an open source, open development, Astropy affiliated package for ground-based observation planning and scheduling in Python. astroplan is designed to provide efficient access to common observational quantities such as…

LensKit is an open-source toolkit for building, researching, and learning about recommender systems. First released in 2010 as a Java framework, it has supported diverse published research, small-scale production deployments, and education…

Information Retrieval · Computer Science 2020-09-04 Michael D. Ekstrand

The Astropy project supports and fosters the development of open-source and openly-developed Python packages that provide commonly-needed functionality to the astronomical community. A key element of the Astropy project is the core package…

Instrumentation and Methods for Astrophysics · Physics 2018-08-29 The Astropy Collaboration , A. M. Price-Whelan , B. M. Sipőcz , H. M. Günther , P. L. Lim , S. M. Crawford , S. Conseil , D. L. Shupe , M. W. Craig , N. Dencheva , A. Ginsburg , J. T. VanderPlas , L. D. Bradley , D. Pérez-Suárez , M. de Val-Borro , T. L. Aldcroft , K. L. Cruz , T. P. Robitaille , E. J. Tollerud , C. Ardelean , T. Babej , M. Bachetti , A. V. Bakanov , S. P. Bamford , G. Barentsen , P. Barmby , A. Baumbach , K. L. Berry , F. Biscani , M. Boquien , K. A. Bostroem , L. G. Bouma , G. B. Brammer , E. M. Bray , H. Breytenbach , H. Buddelmeijer , D. J. Burke , G. Calderone , J. L. Cano Rodríguez , M. Cara , J. V. M. Cardoso , S. Cheedella , Y. Copin , D. Crichton , D. DÁvella , C. Deil , É. Depagne , J. P. Dietrich , A. Donath , M. Droettboom , N. Earl , T. Erben , S. Fabbro , L. A. Ferreira , T. Finethy , R. T. Fox , L. H. Garrison , S. L. J. Gibbons , D. A. Goldstein , R. Gommers , J. P. Greco , P. Greenfield , A. M. Groener , F. Grollier , A. Hagen , P. Hirst , D. Homeier , A. J. Horton , G. Hosseinzadeh , L. Hu , J. S. Hunkeler , Ž. Ivezić , A. Jain , T. Jenness , G. Kanarek , S. Kendrew , N. S. Kern , W. E. Kerzendorf , A. Khvalko , J. King , D. Kirkby , A. M. Kulkarni , A. Kumar , A. Lee , D. Lenz , S. P. Littlefair , Z. Ma , D. M. Macleod , M. Mastropietro , C. McCully , S. Montagnac , B. M. Morris , M. Mueller , S. J. Mumford , D. Muna , N. A. Murphy , S. Nelson , G. H. Nguyen , J. P. Ninan , M. Nöthe , S. Ogaz , S. Oh , J. K. Parejko , N. Parley , S. Pascual , R. Patil , A. A. Patil , A. L. Plunkett , J. X. Prochaska , T. Rastogi , V. Reddy Janga , J. Sabater , P. Sakurikar , M. Seifert , L. E. Sherbert , H. Sherwood-Taylor , A. Y. Shih , J. Sick , M. T. Silbiger , S. Singanamalla , L. P. Singer , P. H. Sladen , K. A. Sooley , S. Sornarajah , O. Streicher , P. Teuben , S. W. Thomas , G. R. Tremblay , J. E. H. Turner , V. Terrón , M. H. van Kerkwijk , A. de la Vega , L. L. Watkins , B. A. Weaver , J. B. Whitmore , J. Woillez , V. Zabalza