Holographic Beam Mapping of the CHIME Pathfinder Array

Abstract

The Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder radio telescope is currently surveying the northern hemisphere between 400 and 800 MHz. By mapping the large scale structure of neutral hydrogen through its redshifted 21 cm line emission between $z\sim 0.8-2.5$ CHIME will contribute to our understanding of Dark Energy. Bright astrophysical foregrounds must be separated from the neutral hydrogen signal, a task which requires precise characterization of the polarized telescope beams. Using the DRAO John A. Galt 26 m telescope, we have developed a holography instrument and technique for mapping the CHIME Pathfinder beams. We report the status of the instrument and initial results of this effort.

arXiv comment16 pages, 9 figures. Submitted to Proc. SPIE, Astronomical Telescopes + Instrumentation (2016)

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Cited by in corpus (20)

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• The First CHIME/FRB Fast Radio Burst Catalog
• CHIME/FRB Detection of Eight New Repeating Fast Radio Burst Sources
• A Second Source of Repeating Fast Radio Bursts
• Line-Intensity Mapping: 2017 Status Report
• Fundamental Limitations on the Calibration of Redundant 21 cm Cosmology Instruments and Implications for HERA and the SKA
• Searching for Dark Matter with Neutron Star Mergers and Quiet Kilonovae
• Inflation and Early Dark Energy with a Stage II Hydrogen Intensity Mapping Experiment
• Validation of EDGES Low-Band Antenna Beam Model
• Limits on the ultra-bright Fast Radio Burst population from the CHIME Pathfinder
• Self-triggered radio detection and identification of cosmic air showers with the OVRO-LWA
• Measuring HERA's primary beam in-situ: methodology and first results
• Using the Sun to Measure the Primary Beam Response of the Canadian Hydrogen Intensity Mapping Experiment
• Dual Polarization Measurements of MWA Beampatterns at 137 MHz
• Effects of model incompleteness on the drift-scan calibration of radio telescopes
• 21 cm Intensity Mapping with the DSA-2000
• Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME)
• A Polarization Pipeline for Fast Radio Bursts Detected by CHIME/FRB
• Measurement of the Primary Beam of the Tianlai Cylindrical Antenna Using an Unmanned Aerial Vehicle
• An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment