An analysis pipeline for CHIME/FRB full-array baseband data

Abstract

The Canadian Hydrogen Intensity Mapping Experiment (CHIME) has become a leading facility for detecting fast radio bursts (FRBs) through the CHIME/FRB backend. CHIME/FRB searches for fast transients in polarization-summed intensity data streams that have 24-kHz spectral and 1-ms temporal resolution. The intensity beams are pointed to pre-determined locations in the sky. A triggered baseband system records the coherent electric field measured by each antenna in the CHIME array at the time of FRB detections. Here we describe the analysis techniques and automated pipeline developed to process these full-array baseband data recordings. Whereas the real-time FRB detection pipeline has a localization limit of several arcminutes, offline analysis of baseband data yields source localizations with sub-arcminute precision, as characterized by using a sample of pulsars and one repeating FRB with known positions. The baseband pipeline also enables resolving temporal substructure on a micro-second scale and the study of polarization including detections of Faraday rotation.

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Cited by in corpus (35)

• The First CHIME/FRB Fast Radio Burst Catalog
• Fast Radio Burst Morphology in the First CHIME/FRB Catalog
• CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources
• A Local Universe Host for the Repeating Fast Radio Burst FRB 20181030A
• Sub-second periodicity in a fast radio burst
• A sudden period of high activity from repeating Fast Radio Burst 20201124A
• CHIME/FRB Catalog 1 results: statistical cross-correlations with large-scale structure
• Sub-arcminute localization of 13 repeating fast radio bursts detected by CHIME/FRB
• A Large Scale Magneto-ionic Fluctuation in the Local Environment of Periodic Fast Radio Burst Source, FRB 20180916B
• Revealing the Dynamic Magneto-ionic Environments of Repeating Fast Radio Burst Sources through Multi-year Polarimetric Monitoring with CHIME/FRB
• Constraining Primordial Black Holes using Fast Radio Burst Gravitational-Lens Interferometry with CHIME/FRB
• Evidence of a shared spectro-temporal law between sources of repeating fast radio bursts
• Stellar prospects for FRB gravitational lensing
• A fast radio burst localized at detection to an edge-on galaxy using very-long-baseline interferometry
• A High-Time Resolution Search for Compact Objects using Fast Radio Burst Gravitational Lens Interferometry with CHIME/FRB
• Localizing FRBs through VLBI with the Algonquin Radio Observatory 10-m Telescope
• Pulsar revival in neutron star mergers: multi-messenger prospects for the discovery of pre-merger coherent radio emission
• A clock stabilization system for CHIME/FRB Outriggers
• CHIME/FRB/Pulsar discovery of a nearby long period radio transient with a timing glitch
• Limits on Fast Radio Burst-like Counterparts to Gamma-ray Bursts using CHIME/FRB
• Mitigating radio frequency interference in CHIME/FRB real-time intensity data
• FRB 190520B -- A FRB in a Supernova Remnant?
• Contemporaneous X-ray Observations of 30 Bright Radio Bursts from the Prolific Fast Radio Burst Source FRB 20220912A
• Non-detection of CHIME/FRB sources with the Arecibo Observatory
• Constraining Near-Simultaneous Radio Emission from Short Gamma-ray Bursts using CHIME/FRB
• Simulating FRB Morphologies and Coherent Phase Correlation Signatures from Multi-Plane Astrophysical Lensing
• Robust Assessment of Clustering Methods for Fast Radio Transient Candidates
• A Spatial Gap in the Sky Distribution of Fast Radio Burst Detections Coinciding with Galactic Plasma Overdensities
• Exploring selection biases in FRB dispersion-galaxy cross-correlations with magnetohydrodynamical simulations
• Redshift Distributions of Fast Radio Bursts Inferred Using Clustering in Dispersion Measure Space
• A Polarization Pipeline for Fast Radio Bursts Detected by CHIME/FRB
• TONE: A CHIME/FRB Outrigger Pathfinder for localizations of Fast Radio Bursts using Very Long Baseline Interferometry
• Detection of Partial Coherence due to Multipath Propagation for FRB 20220413B with CHIME/FRB
• Constraining Primordial Black Hole Dark Matter with CHIME Fast Radio Bursts
• Forecasting the FRB Population Observed Through Galaxy Cluster Lenses