A Search for Persistent Radio Sources toward Repeating Fast Radio Bursts Discovered by CHIME/FRB

Abstract

Copyright and License

© 2024. The Author(s). Published by the American Astronomical Society.

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Acknowledgement

We acknowledge Gabriele Bruni and Yuan-Pei Yang for their useful conversations.

We acknowledge that CHIME is located in the traditional, ancestral, and unceded territory of the Syilx/Okanagan people. We are grateful to the staff of the Dominion Radio Astrophysical Observatory, which is operated by the National Research Council of Canada. CHIME is funded by a grant from the Canada Foundation for Innovation (CFI) 2012 Leading Edge Fund (project 31170) and by contributions from the provinces of British Columbia, Quebec, and Ontario. The CHIME/FRB Project is funded by a grant from the CFI 2015 Innovation Fund (project 33213) and by contributions from the provinces of British Columbia and Quebec, and by the Dunlap Institute for Astronomy and Astrophysics at the University of Toronto. Additional support was provided by the Canadian Institute for Advanced Research (CIFAR), McGill University, and the McGill Space Institute thanks to the Trottier Family Foundation and the University of British Columbia. The CHIME/FRB baseband system is funded in part by a Canada Foundation for Innovation John R. Evans Leaders Fund award to IHS.

The National Radio Astronomy Observatory (NRAO) is a facility of the National Science Foundation operated under a cooperative agreement by Associated Universities, Inc. We would like to acknowledge NRAO for telescope time awarded through the Karl G. Jansky Very Large Array (VLA) interferometer for program Nos. 20B-280, 20A-469, 21B-176, and 21A-387. We also thank the NRAO staff for their help in the preparation of observations.

The Dunlap Institute is funded through an endowment established by the David Dunlap family and the University of Toronto.

Some of this work is based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the Science and Technology Facilities Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministério da Ciência e Tecnologia (Brazil), and SECYT (Argentina). We appreciate the Gemini team for granting us observing time for the program IDs: GN-2022A-Q-212, GN-2022B-Q-308, and GN-2022B-Q-116.

Basic research in radio astronomy at the U.S. Naval Research Laboratory is supported by 6.1 Base funding. The construction and installation of VLITE were supported by the NRL Sustainment Restoration and Maintenance fund.

B.M.G. acknowledges the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) through grant RGPIN-2022-03163 and of the Canada Research Chairs program. M.R.D. acknowledges support from the NSERC through grant RGPIN-2019-06186, and of the Canada Research Chairs Program, and the Dunlap Institute at the University of Toronto. V.M.K. holds the Lorne Trottier Chair in Astrophysics & Cosmology, a Distinguished James McGill Professorship, and receives support from an NSERC Discovery grant (RGPIN-228738-13) and from the FRQNT CRAQ. J.W.T.H. is a Canada Excellence Research Chair in Transient Astrophysics.

N.S. acknowledges the support from NASA (grant No. 80NSSC22K0332), NASA FINESST (grant No. 80NSSC22K1597), Columbia University Dean's fellowship, and a grant from the Simons Foundation. T. E. is supported by NASA through the NASA Hubble Fellowship grant HST-HF2-51504.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. A.M.C. is funded by an NSERC Doctoral Postgraduate Scholarship. A.B.P. is a Banting Fellow, a McGill Space Institute (MSI) Fellow, and a Fonds de Recherche du Quebec—Nature et Technologies (FRQNT) postdoctoral fellow. K.W.M. holds the Adam J. Burgasser Chair in Astrophysics and is supported by NSF grants (2008031, 2018490). S.P.T. is a CIFAR Azrieli Global Scholar in the Gravity and Extreme Universe Program. Z.P. was a Dunlap Fellow and is supported by an NWO Veni fellowship (VI.Veni.222.295). A.P. is funded by the NSERC Canada Graduate Scholarships—Doctoral program. K.N. is an MIT Kavli Fellow. F.K. acknowledges support from Onsala Space Observatory for the provisioning of its facilities/observational support. The Onsala Space Observatory national research infrastructure is funded through Swedish Research Council grant No. 2017-00648. M.B. is a McWilliams fellow and an International Astronomical Union Gruber fellow. M.B. also receives support from the McWilliams seed grant.

Facilities

CHIME - , VLA - Very Large Array, Gemini:Gillett - Gillett Gemini North Telescope.

Software References

FRUITBAT (A. Batten 2019), PHOTUTILS (L. Bradley et al. 2023), SExtractor (E. Bertin & S. Arnouts 1996), IRAF (S. Blondin et al. 2012), PYRAF (Science Software Branch at STScI 2012), PypeIt (J. Prochaska et al. 2020), CASA (J. P. McMullin et al. 2007), pwkit (P. K. G. Williams et al. 2017), AEGEAN (P. J. Hancock et al. 2018), Astropy (Astropy Collaboration et al. 2013, 2018, 2022), Matplotlib (J. D. Hunter 2007), NumPy (C. R. Harris et al. 2020), SAOImage DS9 (W. A. Joye & E. Mandel 2003).