Matches in SemOpenAlex for { <https://semopenalex.org/work/W3215757195> ?p ?o ?g. }
- W3215757195 endingPage "A153" @default.
- W3215757195 startingPage "A153" @default.
- W3215757195 abstract "We present a new Bayesian method for reconstructing the parent distributions of X-ray spectral parameters of active galactic nuclei (AGN) in large surveys. The method uses the probability distribution function (PDF) of posteriors obtained by fitting a consistent physical model to each object with a Bayesian method. The PDFs are often broadly distributed and may present systematic biases, such that naive point estimators or even some standard parametric modeling are not sufficient to reconstruct the parent population without obvious bias. Our method uses a transfer function computed from a large realistic simulation with the same selection as in the actual sample to redistribute the stacked PDF and then forward-fit a nonparametric model to it in a Bayesian way, so that the biases in the PDFs are properly taken into account. In this way, we are able to accurately reconstruct the parent distributions. We apply our spectral fitting and population inference methods to the XMM -COSMOS survey as a pilot study. For the 819 AGN detected in the COSMOS field, 663 (81%) of which have spectroscopic redshifts (spec- z ) and the others high-quality photometric redshifts (photo- z ), we find prominent bi-modality with widely separated peaks in the distribution of the absorbing hydrogen column density ( N H ) and an indication that absorbed AGN have harder photon indices. A clear decreasing trend of the absorbed AGN fraction versus the intrinsic 2–10 keV luminosity is observed, but there is no clear evolution in the absorbed fraction with redshift. Our method is designed to be readily applicable to large AGN samples such as the XXL survey, and eventually eROSITA." @default.
- W3215757195 created "2021-12-06" @default.
- W3215757195 creator A5031917607 @default.
- W3215757195 creator A5039049327 @default.
- W3215757195 creator A5047746082 @default.
- W3215757195 creator A5066183960 @default.
- W3215757195 date "2022-11-01" @default.
- W3215757195 modified "2023-09-26" @default.
- W3215757195 title "Reconstructing AGN X-ray spectral parameter distributions with Bayesian methods" @default.
- W3215757195 cites W1757987097 @default.
- W3215757195 cites W1782044501 @default.
- W3215757195 cites W1785948033 @default.
- W3215757195 cites W1839094326 @default.
- W3215757195 cites W1863638710 @default.
- W3215757195 cites W1886713477 @default.
- W3215757195 cites W1911322997 @default.
- W3215757195 cites W1965134192 @default.
- W3215757195 cites W1971781650 @default.
- W3215757195 cites W1979115990 @default.
- W3215757195 cites W1980547824 @default.
- W3215757195 cites W1982205612 @default.
- W3215757195 cites W1992708776 @default.
- W3215757195 cites W1995809541 @default.
- W3215757195 cites W1996932215 @default.
- W3215757195 cites W1997106536 @default.
- W3215757195 cites W2002044265 @default.
- W3215757195 cites W2007084280 @default.
- W3215757195 cites W2022862485 @default.
- W3215757195 cites W2026132224 @default.
- W3215757195 cites W2031098172 @default.
- W3215757195 cites W2035111960 @default.
- W3215757195 cites W2036006391 @default.
- W3215757195 cites W2038561135 @default.
- W3215757195 cites W2038786719 @default.
- W3215757195 cites W2044541854 @default.
- W3215757195 cites W2059686410 @default.
- W3215757195 cites W2060819359 @default.
- W3215757195 cites W2064174537 @default.
- W3215757195 cites W2067509014 @default.
- W3215757195 cites W2073862476 @default.
- W3215757195 cites W2086879135 @default.
- W3215757195 cites W2089863415 @default.
- W3215757195 cites W2090903589 @default.
- W3215757195 cites W2092931342 @default.
- W3215757195 cites W2105369461 @default.
- W3215757195 cites W2105602242 @default.
- W3215757195 cites W2109032570 @default.
- W3215757195 cites W2120656065 @default.
- W3215757195 cites W2124219338 @default.
- W3215757195 cites W2130638402 @default.
- W3215757195 cites W2135894620 @default.
- W3215757195 cites W2144320326 @default.
- W3215757195 cites W2153478568 @default.
- W3215757195 cites W2154078330 @default.
- W3215757195 cites W2156582991 @default.
- W3215757195 cites W2158528198 @default.
- W3215757195 cites W2169687337 @default.
- W3215757195 cites W2183902373 @default.
- W3215757195 cites W2194080530 @default.
- W3215757195 cites W2230972173 @default.
- W3215757195 cites W2340905026 @default.
- W3215757195 cites W2413988422 @default.
- W3215757195 cites W2469346554 @default.
- W3215757195 cites W2498126760 @default.
- W3215757195 cites W2561905335 @default.
- W3215757195 cites W2758268742 @default.
- W3215757195 cites W2760203217 @default.
- W3215757195 cites W2883127114 @default.
- W3215757195 cites W2902534990 @default.
- W3215757195 cites W2950472986 @default.
- W3215757195 cites W2950866286 @default.
- W3215757195 cites W2963518985 @default.
- W3215757195 cites W3098208149 @default.
- W3215757195 cites W3099294563 @default.
- W3215757195 cites W3099428329 @default.
- W3215757195 cites W3100302622 @default.
- W3215757195 cites W3100445047 @default.
- W3215757195 cites W3100514957 @default.
- W3215757195 cites W3101063570 @default.
- W3215757195 cites W3101630025 @default.
- W3215757195 cites W3101823059 @default.
- W3215757195 cites W3102320523 @default.
- W3215757195 cites W3102937302 @default.
- W3215757195 cites W3103575363 @default.
- W3215757195 cites W3103637012 @default.
- W3215757195 cites W3104188978 @default.
- W3215757195 cites W3104330986 @default.
- W3215757195 cites W3104607083 @default.
- W3215757195 cites W3105306757 @default.
- W3215757195 cites W3105713365 @default.
- W3215757195 cites W3118371550 @default.
- W3215757195 cites W3121794770 @default.
- W3215757195 cites W3122149873 @default.
- W3215757195 cites W3123112321 @default.
- W3215757195 cites W3123668798 @default.
- W3215757195 cites W3217275604 @default.
- W3215757195 cites W4205663168 @default.
- W3215757195 cites W4213310639 @default.