PUMA: The Positional Update and Matching Algorithm

Abstract

We present new software to cross-match low-frequency radio catalogues: the Positional Update and Matching Algorithm (PUMA). PUMA combines a positional Bayesian probabilistic approach with spectral matching criteria, allowing for confusing sources in the matching process. We go on to create a radio sky model using PUMA based on the Murchison Widefield Array Commissioning Survey, and are able to automatically cross-match 98.5% of sources. Using the characteristics of this sky model, we create simple simulated mock catalogues on which to test PUMA, and find that PUMA can reliably find the correct spectral indices of sources, along with being able to recover ionospheric offsets. Finally, we use this sky model to calibrate and remove foreground sources from simulated interferometric data, generated using OSKAR (the Oxford University visibility generator). We demonstrate that there is a substantial improvement in foreground source removal when using higher frequency and higher resolution source positions, even when correcting positions by an average of 0.3 given a synthesized beam-width of 2.3.

Accepted for publication in Publications of the Astronomical Society of Australia (PASA) - 34 pages - 20 figures - PUMA github repository: https://github.com/JLBLine/PUMA

References in corpus (43)

• LOFAR: The LOw-Frequency ARray
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• 21-cm cosmology
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. II. The Source Catalogue
• Reionization and Cosmology with 21 cm Fluctuations
• The Precision Array for Probing the Epoch of Reionization: 8 Station Results
• The VLA Low-frequency Sky Survey
• Ionospheric Calibration of Low Frequency Radio Interferometric Observations using the Peeling Scheme: I. Method Description and First Results
• Bright Source Subtraction Requirements For Redshifted 21 cm Measurements
• What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
• Science with the Murchison Widefield Array
• Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
• GLEAM: The GaLactic and Extragalactic All-sky MWA survey
• The Very Large Array Low-frequency Sky Survey Redux (VLSSr)
• Imaging the Epoch of Reionization: limitations from foreground confusion and imaging algorithms
• Radio interferometric gain calibration as a complex optimization problem
• The impact of point source subtraction residuals on 21 cm Epoch of Reionization estimation
• A Sensitivity and Array-Configuration Study for Measuring the Power Spectrum of 21cm Emission from Reionization
• Dos and don'ts of reduced chi-squared
• Real-Time Calibration of the Murchison Widefield Array
• A Unified Catalog of Radio Objects Detected by NVSS, FIRST, WENSS, GB6, and SDSS
• A study of fundamental limitations to statistical detection of redshifted HI from the epoch of reionization
• The low-frequency environment of the Murchison Widefield Array: radio-frequency interference analysis and mitigation
• Probabilistic Cross-Identification of Astronomical Sources
• WISE x SuperCOSMOS photometric redshift catalog: 20 million galaxies over 3pi steradians
• CHIPS: The Cosmological HI Power Spectrum Estimator
• Advances in Calibration and Imaging Techniques in Radio Interferometry
• The LOFAR Multifrequency Snapshot Sky Survey (MSSS) I. Survey description and first results
• The Fundamental Multi-Baseline Mode-Mixing Foreground in 21 cm EoR Observations
• The Importance of Wide-field Foreground Removal for 21 cm Cosmology: A Demonstration With Early MWA Epoch of Reionization Observations
• XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources
• Broadband Spectral Modeling of the Extreme Gigahertz-Peaked Spectrum Radio Source PKS B0008-421
• Investigating slim disk solutions for HLX-1 in ESO 243-49
• Parametrising Epoch of Reionization foregrounds: A deep survey of low-frequency point-source spectra with the MWA
• The Murchison Widefield Array 21 cm Power Spectrum Analysis Methodology
• The EoR Sensitivity of the Murchison Widefield Array
• Discovery of HI gas in a young radio galaxy at $z=0.44$ using the Australian Square Kilometre Array Pathfinder
• VLSS Redux: Software Improvements applied to the Very Large Array Low-frequency Sky Survey
• Bayesian Matching for X-ray and Infrared Sources in the MYStIX Project
• The Murchison Widefield Array Correlator
• A High Reliability Survey of Discrete Epoch of Reionization Foreground Sources in the MWA EoR0 Field
• Clustered Calibration: An Improvement to Radio Interferometric Direction Dependent Self-Calibration

Cited by in corpus (26)

• Fundamental Physics with the Square Kilometre Array
• Data Analysis for Precision 21 cm Cosmology
• Characterisation of the ionosphere above the Murchison Radio Observatory using the Murchison Widefield Array
• A new MWA limit on the 21 cm Power Spectrum at Redshifts $\sim$ 13 $-$ 17
• DAYENU: A Simple Filter of Smooth Foregrounds for Intensity Mapping Power Spectra
• Science with the Murchison Widefield Array: Phase I Results and Phase II Opportunities
• A high resolution foreground model for the MWA EoR1 field: model and implications for EoR power spectrum analysis
• Radio Galaxy Zoo: Knowledge Transfer Using Rotationally Invariant Self-Organising Maps
• A southern-sky total intensity source catalogue at 2.3 GHz from S-band Polarisation All-Sky Survey data
• The GLEAM 4-Jy (G4Jy) Sample: I. Definition and the catalogue
• Measuring the global 21-cm signal with the MWA-I: improved measurements of the Galactic synchrotron background using lunar occultation
• Probing pulsar scattering between 120 and 280 MHz with the MWA
• Modelling and peeling extended sources with shapelets: a Fornax A case study
• Detectability of 21cm-signal during the Epoch of Reionization with 21cm-Lyman-α emitter cross-correlation. II. Foreground contamination
• The Effect of Unresolved Contaminant Stars on the Cross-Matching of Photometric Catalogues
• Building models for extended radio sources: implications for Epoch of Reionisation science
• Radio Continuum Sources behind the Large Magellanic Cloud
• Matching LOFAR sources across radio bands
• Study of systematics effects on the Cross Power Spectrum of 21 cm Line and Cosmic Microwave Background using Murchison Widefield Array Data
• Measuring the global 21-cm signal with the MWA-II: improved characterisation of lunar-reflected radio frequency interference
• Improving Catalogue Matching By Supplementing Astrometry with Additional Photometric Information
• Epoch of Reionization Power Spectrum Limits from Murchison Widefield Array Data Targeted at EoR1 Field
• A Multi-Mechanism Hybrid Model of Peaked-Spectrum Radio Sources
• The MWA Long Baseline Epoch of Reionisation Survey: I. Improved Source Catalogue for the EoR 0 field
• Low-frequency integrated radio spectra of diffuse, steep-spectrum sources in galaxy clusters: palaeontology with the MWA and ASKAP
• A bubble size distribution model for the Epoch of Reionization