| Téléchargement | - Voir la version finale : A clock stabilization system for CHIME/FRB outriggers (PDF, 1.5 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.3847/1538-3881/ac397a |
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| Auteur | Rechercher : Mena-Parra, J.Identifiant ORCID : https://orcid.org/0000-0002-0772-9326; Rechercher : Leung, C.Identifiant ORCID : https://orcid.org/0000-0002-4209-7408; Rechercher : Cary, S.Identifiant ORCID : https://orcid.org/0000-0003-1860-1632; Rechercher : Masui, K. W.Identifiant ORCID : https://orcid.org/0000-0002-4279-6946; Rechercher : Kaczmarek, J. F.1Identifiant ORCID : https://orcid.org/0000-0003-4810-7803; Rechercher : Amiri, M.Identifiant ORCID : https://orcid.org/0000-0001-6523-9029; Rechercher : Bandura, K.Identifiant ORCID : https://orcid.org/0000-0003-3772-2798; Rechercher : Boyle, P. J.Identifiant ORCID : https://orcid.org/0000-0001-8537-9299; Rechercher : Cassanelli, T.Identifiant ORCID : https://orcid.org/0000-0003-2047-5276; Rechercher : Cliche, J.-F.Identifiant ORCID : https://orcid.org/0000-0001-6509-8430; Rechercher : Dobbs, M.Identifiant ORCID : https://orcid.org/0000-0001-7166-6422; Rechercher : Kaspi, V. M.Identifiant ORCID : https://orcid.org/0000-0001-9345-0307; Rechercher : Landecker, T. L.1Identifiant ORCID : https://orcid.org/0000-0003-1455-2546; Rechercher : Lanman, A.Identifiant ORCID : https://orcid.org/0000-0003-2116-3573; Rechercher : Sievers, J. L.Identifiant ORCID : https://orcid.org/0000-0001-6903-5074 |
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| Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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| Bailleur de fonds | Rechercher : Canada Foundation for Innovation; Rechercher : National Science Foundation |
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| Format | Texte, Article |
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| Sujet | radio astronomy; radio transient sources; radio pulsars; astronomical instrumentation; very long baseline interferometry |
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| Résumé | The Canadian Hydrogen Intensity Mapping Experiment (CHIME) has emerged as the prime telescope for detecting fast radio bursts (FRBs). CHIME/FRB Outriggers will be a dedicated very-long-baseline interferometry (VLBI) instrument consisting of outrigger telescopes at continental baselines working with CHIME and its specialized real-time transient-search backend (CHIME/FRB) to detect and localize FRBs with 50 mas precision. In this paper, we present a minimally invasive clock stabilization system that effectively transfers the CHIME digital backend reference clock from its original GPS-disciplined ovenized crystal oscillator to a passive hydrogen maser. This enables us to combine the long-term stability and absolute time tagging of the GPS clock with the short- and intermediate-term stability of the maser to reduce the clock timing errors between VLBI calibration observations. We validate the system with VLBI-style observations of Cygnus A over a 400 m baseline between CHIME and the CHIME Pathfinder, demonstrating agreement between sky-based and maser-based timing measurements at the 30 ps rms level on timescales ranging from one minute to up to nine days, and meeting the stability requirements for CHIME/FRB Outriggers. In addition, we present an alternate reference clock solution for outrigger stations that lack the infrastructure to support a passive hydrogen maser. |
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| Date de publication | 2022-01-07 |
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| Maison d’édition | IOP
American Astronomical Society |
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| Licence | |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 98c38b57-d765-4c75-bc1a-fc2257308172 |
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| Enregistrement créé | 2023-09-20 |
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| Enregistrement modifié | 2023-09-20 |
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