Results 11 to 20 of about 43 (43)

Stratified learning: A general‐purpose statistical method for improved learning under covariate shift

Statistical Analysis and Data Mining: The ASA Data Science Journal, Volume 17, Issue 1, February 2024.
Abstract We propose a simple, statistically principled, and theoretically justified method to improve supervised learning when the training set is not representative, a situation known as covariate shift. We build upon a well‐established methodology in causal inference and show that the effects of covariate shift can be reduced or eliminated by ...
Maximilian Autenrieth, David A. van Dyk, Roberto Trotta, David C. Stenning   +3 more
wiley   +1 more source

Automatic Parallel Tempering Markov Chain Monte Carlo with Nii-C

The Astrophysical Journal Supplement Series
Due to the high dimensionality or multimodality that is common in modern astronomy, sampling Bayesian posteriors can be challenging. Several publicly available codes based on different sampling algorithms can solve these complex models, but the execution
Sheng Jin, Wenxin Jiang, Dong-Hong Wu
doaj   +1 more source

An Information-based Metric for Observing Strategy Optimization, Demonstrated in the Context of Photometric Redshifts for LSST

The Astrophysical Journal Supplement Series
The observing strategy (OS) of an astronomical survey influences the degree to which its resulting data can be used to accomplish any science goal, necessitating upcoming programs, including those on the Rubin and Roman telescopes, to solicit metrics in ...
Alex I. Malz, Francois Lanusse, John Franklin Crenshaw, Bryan Scott, Melissa L. Graham   +4 more
doaj   +1 more source

paired: A Statistical Framework for Detecting Stellar Binarity with Gaia RVs. I. Sensitivity to Unresolved Binaries

The Astrophysical Journal
Data Release 3 (DR3) from the Gaia Mission includes radial velocity measurements of over 33 million targets. Among many scientific applications, the overlap of this stellar sample with targeted exoplanet transit survey stars presents an opportunity to ...
Quadry Chance, Daniel Foreman-Mackey, Sarah Ballard, Andrew R. Casey, Trevor J. David, Adrian M. Price-Whelan   +5 more
doaj   +1 more source

Designing an Optimal Kilonova Search Using DECam for Gravitational-wave Events

The Astrophysical Journal
We address the problem of optimally identifying all kilonovae detected via gravitational-wave emission in the upcoming LIGO/Virgo/KAGRA observing run, O4, which is expected to be sensitive to a factor of ∼7 more binary neutron star (BNS) alerts than ...
C. R. Bom, J. Annis, A. Garcia, A. Palmese, N. Sherman, M. Soares-Santos, L. Santana-Silva, R. Morgan, K. Bechtol, T. Davis, H. T. Diehl, S. S. Allam, T. G. Bachmann, B. M. O. Fraga, J. García-Bellido, M. S. S. Gill, K. Herner, C. D. Kilpatrick, M. Makler, F. Olivares E., M. E. S. Pereira, J. Pineda, A. Santos, D. L. Tucker, M. P. Wiesner, M. Aguena, O. Alves, D. Bacon, P. H. Bernardinelli, E. Bertin, S. Bocquet, D. Brooks, M. Carrasco Kind, J. Carretero, C. Conselice, M. Costanzi, L. N. da Costa, J. De Vicente, S. Desai, P. Doel, S. Everett, I. Ferrero, J. Frieman, M. Gatti, D. W. Gerdes, D. Gruen, R. A. Gruendl, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, N. Kuropatkin, P. Melchior, J. Mena-Fernández, F. Menanteau, A. Pieres, A. A. Plazas Malagón, M. Raveri, M. Rodriguez-Monroy, E. Sanchez, B. Santiago, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To, N. Weaverdyck   +69 more
doaj   +1 more source

Diffuse X-Ray Emission in M51: A Hierarchical Bayesian Spatially Resolved Spectral Analysis

The Astrophysical Journal
X-ray observations can be used to effectively probe the galactic ecosystem, particularly its hot and energetic components. However, existing X-ray studies of nearby star-forming galaxies are limited by insufficient data statistics and a lack of suitable ...
Luan Luan, Q. Daniel Wang
doaj   +1 more source

Detecting Stellar Flares in Photometric Data Using Hidden Markov Models

The Astrophysical Journal
We present a hidden Markov model (HMM) for discovering stellar flares in light-curve data of stars. HMMs provide a framework to model time series data that are nonstationary; they allow for systems to be in different states at different times and ...
J. Arturo Esquivel, Yunyi Shen, Vianey Leos-Barajas, Gwendolyn Eadie, Joshua S. Speagle, Radu V Craiu, Amber Medina, James R. A. Davenport   +7 more
doaj   +1 more source

Joint Deconvolution of Astronomical Images in the Presence of Poisson Noise

The Astronomical Journal
We present a new framework for joint likelihood deconvolution ( Jolideco ) of a set of astronomical observations of the same sky region in the presence of Poisson noise.
Axel Donath, Aneta Siemiginowska, Vinay L. Kashyap, David A. van Dyk, Douglas Burke   +4 more
doaj   +1 more source

Quantification of High-dimensional Non-Gaussianities and Its Implication to Fisher Analysis in Cosmology. [PDF]

Astrophys J, 2023
Park CF, Allys E, Villaescusa-Navarro F, Finkbeiner D.   +3 more
europepmc   +1 more source

Formation of the first three gravitational-wave observations through isolated binary evolution. [PDF]

Nat Commun, 2017
Stevenson S, Vigna-Gómez A, Mandel I, Barrett JW, Neijssel CJ, Perkins D, de Mink SE.   +6 more
europepmc   +1 more source