Results 51 to 60 of about 486 (135)
Automatic Parallel Tempering Markov Chain Monte Carlo with Nii-C
The Astrophysical Journal Supplement SeriesDue 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
Auto-BUQ: Uncertainty Quantification for the Boundaries of Segmented Events
The Astronomical JournalWe present a new method to estimate the boundary of extended sources in high-energy photon lists and to quantify the uncertainty in the boundary. This method extends the graphed seeded region growing method developed by M. Fan et al.
Jue Wang +4 more
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Statistical Properties of a Polarization Vector’s Ellipticity Angle
The Astrophysical JournalThe orientation of a polarization vector on the Poincaré sphere is defined by its position angle (PA) and ellipticity angle (EA). The radio emission from pulsars, magnetars, and fast radio bursts can be elliptically polarized, and measurements of the EA ...
M. M. McKinnon
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The Astrophysical JournalMolecular emission from the galactic and extragalactic interstellar medium (ISM) is often used to determine the physical conditions of the dense gas. However, even from spatially resolved regions, the observed molecules do not necessarily arise from a ...
Damien de Mijolla +3 more
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Regression for Astronomical Data with Realistic Distributions, Errors, and Nonlinearity
The Astronomical JournalWe have developed a new regression technique, the maximum likelihood (ML)–based method and its variant, the Kolmogorov–Smirnov (KS) test–based method, designed to obtain unbiased regression results from typical astronomical data. A normalizing flow model
Tao Jing, Cheng Li
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Jupyter notebooks from Gaussian process and transit fitting hands-on sessions
, 2022 Jupyter notebooks, and auxiliary data, from two "hands-on" sessions at the Exoplanets Astrostatistics Summer School (12-16 Sept. 2022 in Geneva). Notebooks used in these sessions had several blocks of Python code missing, to be filled out by session ...
Vinesh Maguire Rajpaul
core +1 more source
The Astrophysical JournalSpace scientists often face the question of whether data collected by different instruments are measurements of the same source population. This paper proposes a statistical validation method for evaluating the agreement between such related data sets ...
Kelly R. Moran +6 more
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Quantification of High-dimensional Non-Gaussianities and Its Implication to Fisher Analysis in Cosmology. [PDF]
Astrophys J, 2023 Park CF +3 more
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New Organizations to Support Astroinformatics and Astrostatistics
, 2013 In the past two years, the environment within which astronomers conduct their data analysis and management has rapidly changed. Working Groups associated with international societies and Big Data projects have emerged to support and stimulate the new fields of astroinformatics and astrostatistics.
Feigelson, Eric D. +3 more
openaire +2 more sources
High-energy Neutrino Source Cross-correlations with Nearest-neighbor Distributions
The Astrophysical JournalThe astrophysical origins of the majority of the IceCube neutrinos remain unknown. Effectively characterizing the spatial distribution of the neutrino samples and associating the events with astrophysical source catalogs can be challenging given the ...
Zhuoyang Zhou +3 more
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