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Keywords

methods: statistical

How to Cite

Bayesian Estimation of Uncertainties for Redshift Independent Distance Measurements in the Ned-d Catalog. (2018). Revista Mexicana De Astrofísica Y Astronomía Serie De Conferencias, 50, 63-63. https://astronomia.unam.mx/journals/rmxac/article/view/2018rmxac..50...63c
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Abstract

Obtaining individual estimates for uncertainties in redshift-independent galaxy distance measurements can be challenging, as for each galaxy there can be many distance estimates with non-gaussian distributions, some of which may not even have a reported uncertainty. We seek to model uncertainties using a bootstrap sampling of measurements per galaxy per distance estimation method. We then create a predictive bayesian model for estimating galaxy distance uncertainties that is better than simply using a weighted standard deviation. This can be a first step toward predicting distance uncertainties for future catalog-wide analysis.