Powellsnakes II: a fast Bayesian approach to discrete object detection in multi-frequency astronomical data sets

Abstract

Powellsnakes is a Bayesian algorithm for detecting compact objects embedded in a diffuse background, and was selected and successfully employed by the Planck consortium in the production of its first public deliverable: the Early Release Compact Source Catalogue (ERCSC). We present the critical foundations and main directions of further development of PwS, which extend it in terms of formal correctness and the optimal use of all the available information in a consistent unified framework, where no distinction is made between point sources (unresolved objects), SZ clusters, single or multi-channel detection. An emphasis is placed on the necessity of a multi-frequency, multi-model detection algorithm in order to achieve optimality.

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Cited by in corpus (23)

• Planck 2013 results. XXIX. Planck catalogue of Sunyaev-Zeldovich sources
• redMaPPer III: A Detailed Comparison of the Planck 2013 and SDSS DR8 RedMaPPer Cluster Catalogs
• Constraining the evolution of the CMB temperature with SZ measurements from Planck data
• PACT I: Combining ACT and Planck data for optimal detection of tSZ signal
• D${}^3$PO - Denoising, Deconvolving, and Decomposing Photon Observations
• Optical Confirmation and Redshift Estimation of the Planck Cluster Candidates overlapping the Pan-STARRS Survey
• Comparison of Sunyaev-Zel'dovich measurements from Planck and from the Arcminute Microkelvin Imager for 99 galaxy clusters
• Improved Point Source Detection in Crowded Fields using Probabilistic Cataloging
• Sparsity and the Bayesian Perspective
• Deep learning for Sunyaev-Zel'dovich detection in Planck
• Sunyaev--Zel'dovich profile fitting with joint AMI-Planck analysis
• Denoising, deconvolving and decomposing multi-domain photon observations- The D4PO algorithm
• Background Subtraction Uncertainty from Submillimetre to Millimetre Wavelengths
• Physical modelling of galaxy clusters detected by Planck
• Planck intermediate results. LV. Reliability and thermal properties of high-frequency sources in the Second Planck Catalogue of Compact Sources
• Bayesian recalibration of Planck galaxy cluster scaling relations including relativistic Sunyaev-Zel'dovich corrections
• A CMB Gibbs sampler for localized secondary anisotropies
• CARMA observations of massive Planck-discovered cluster candidates at z>0.5 associated with WISE overdensities: strategy, observations and validation
• The C-Band All-Sky Survey (C-BASS): Total intensity point-source detection over the northern sky
• Environment-based selection effects of Planck clusters
• ComPACT: ACT+Planck galaxy cluster catalogue
• Inference of morphology and dynamical state of nearby $Planck$-SZ galaxy clusters with Zernike polynomials
• Temperature measurements with the relativistic Sunyaev-Zel'dovich effect