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The CHIME Pulsar project: system overview

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.3847/1538-4365/abfdcb
AuthorSearch for: ORCID identifier: https://orcid.org/0000-0001-6523-9029; Search for: ORCID identifier: https://orcid.org/0000-0003-3772-2798; Search for: ORCID identifier: https://orcid.org/0000-0001-8537-9299; Search for: ORCID identifier: https://orcid.org/0000-0002-1800-8233; Search for: ORCID identifier: https://orcid.org/0000-0001-6509-8430; Search for: ORCID identifier: https://orcid.org/0000-0002-1529-5169; Search for: ORCID identifier: https://orcid.org/0000-0003-2319-9676; Search for: ORCID identifier: https://orcid.org/0000-0002-6664-965X; Search for: ORCID identifier: https://orcid.org/0000-0003-2381-9804; Search for: ORCID identifier: https://orcid.org/0000-0001-7166-6422; Search for: ORCID identifier: https://orcid.org/0000-0003-4098-5222; Search for: ORCID identifier: https://orcid.org/0000-0002-6899-1176; Search for: ORCID identifier: https://orcid.org/0000-0001-8384-5049; Search for: ORCID identifier: https://orcid.org/0000-0003-1884-348X; Search for: ORCID identifier: https://orcid.org/0000-0002-1760-0868; Search for: ORCID identifier: https://orcid.org/0000-0001-7301-5666; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0001-9345-0307; Search for: 1ORCID identifier: https://orcid.org/0000-0003-1455-2546; Search for: ORCID identifier: https://orcid.org/0000-0002-4209-7408; Search for: ORCID identifier: https://orcid.org/0000-0001-7453-4273; Search for: ORCID identifier: https://orcid.org/0000-0001-5373-5914; Search for: ORCID identifier: https://orcid.org/0000-0002-4279-6946; Search for: ORCID identifier: https://orcid.org/0000-0001-7453-4273; Search for: ORCID identifier: https://orcid.org/0000-0002-0772-9326; Search for: ORCID identifier: https://orcid.org/0000-0001-8845-1225; Search for: ORCID identifier: https://orcid.org/0000-0002-2551-7554; Search for: ORCID identifier: https://orcid.org/0000-0002-9225-9428; Search for: ORCID identifier: https://orcid.org/0000-0002-7333-5552; Search for: ORCID identifier: https://orcid.org/0000-0002-3616-5160; Search for: ORCID identifier: https://orcid.org/0000-0003-3367-1073; Search for: ORCID identifier: https://orcid.org/0000-0002-9516-3245; Search for: ORCID identifier: https://orcid.org/0000-0001-5799-9714; Search for: ORCID identifier: https://orcid.org/0000-0003-3463-7918; Search for: ORCID identifier: https://orcid.org/0000-0002-7374-7119; Search for: ORCID identifier: https://orcid.org/0000-0002-4543-4588; Search for: ORCID identifier: https://orcid.org/0000-0002-1235-4485; Search for: ORCID identifier: https://orcid.org/0000-0001-9784-8670; Search for: ORCID identifier: https://orcid.org/0000-0001-7509-0117; Search for: ORCID identifier: https://orcid.org/0000-0003-2548-2926; Search for: ORCID identifier: https://orcid.org/0000-0002-7436-2325; Search for: ORCID identifier: https://orcid.org/0000-0003-4535-9378; Search for: ORCID identifier: https://orcid.org/0000-0002-1491-3738; Search for: ORCID identifier: https://orcid.org/0000-0002-2472-6485
Affiliation
  1. National Research Council Canada. Herzberg Astronomy and Astrophysics
FormatText, Article
Subjectastronomy data acquisition; astronomy data analysis; radio astronomy; radio pulsars; pulsar timing method; astronomical instrumentation
Abstract
We present the design, implementation, and performance of the digital pulsar observing system constructed for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Using accelerated computing, this system processes independent, digitally steered beams formed by the CHIME correlator to simultaneously observe up to 10 radio pulsars and transient sources. Each of these independent streams is processed by the CHIME/Pulsar back-end system, which can coherently dedisperse, in real time, up to dispersion measure values of 2500 pc cm⁻³. The tracking beams and real-time analysis system are autonomously controlled by a priority-based algorithm that schedules both known sources and positions of interest for observation with observing cadences as rapid as 1 day. Given the distribution of known pulsars and radio-transient sources and the dynamic scheduling, the CHIME/Pulsar system can monitor 400–500 positions once per sidereal day and observe most sources with declinations greater than −20° once every ∼4 weeks. We also discuss the extensive science program enabled through the current modes of data acquisition for CHIME/Pulsar that centers on timing and searching experiments.
Publication date
PublisherIOP
In
  • The Astrophysical Journal Supplement Series 255, no. 1 (28 June 2021).
LanguageEnglish
Peer reviewedYes
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Record identifier04229bd3-46ca-49df-ac27-e3044e2dc93c
Record created2023-05-03
Record modified2023-05-03
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