CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources


Journal article


T. C. C. B. C. Andersen, K. Bandura, M. Bhardwaj, P. Boyle, C. Brar, T. Cassanelli, S. Chatterjee, P. Chawla, A. Cook, A. Curtin, M. Dobbs, F. Dong, J. Faber, M. Fandino, E. Fonseca, B. Gaensler, U. Giri, Antonio Herrera-Martín, A. Hill, A. Ibik, A. Josephy, J. Kaczmarek, Zarif Kader, V. Kaspi, T. Landecker, A. Lanman, M. Lazda, C. Leung, Hsiu-Hsien Lin, K. Masui, R. Mckinven, J. Mena-Parra, B. W. Meyers, D. Michilli, C. Ng, A. Pandhi, A. Pearlman, U. Pen, E. Petroff, Z. Pleunis, M. Rafiei-Ravandi, Mubdi Rahman, S. Ransom, A. Renard, K. R. Sand, P. Sanghavi, P. Scholz, V. Shah, K. Shin, S. Siegel, I. Stairs, Jianing Su, S. Tendulkar, K. Vanderlinde, Haochen Wang, D. Wulf, A. Zwaniga
Astrophysical Journal, 2023

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APA   Click to copy
Andersen, T. C. C. B. C., Bandura, K., Bhardwaj, M., Boyle, P., Brar, C., Cassanelli, T., … Zwaniga, A. (2023). CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources. Astrophysical Journal.


Chicago/Turabian   Click to copy
Andersen, T. C. C. B. C., K. Bandura, M. Bhardwaj, P. Boyle, C. Brar, T. Cassanelli, S. Chatterjee, et al. “CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources.” Astrophysical Journal (2023).


MLA   Click to copy
Andersen, T. C. C. B. C., et al. “CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources.” Astrophysical Journal, 2023.


BibTeX   Click to copy

@article{t2023a,
  title = {CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources},
  year = {2023},
  journal = {Astrophysical Journal},
  author = {Andersen, T. C. C. B. C. and Bandura, K. and Bhardwaj, M. and Boyle, P. and Brar, C. and Cassanelli, T. and Chatterjee, S. and Chawla, P. and Cook, A. and Curtin, A. and Dobbs, M. and Dong, F. and Faber, J. and Fandino, M. and Fonseca, E. and Gaensler, B. and Giri, U. and Herrera-Martín, Antonio and Hill, A. and Ibik, A. and Josephy, A. and Kaczmarek, J. and Kader, Zarif and Kaspi, V. and Landecker, T. and Lanman, A. and Lazda, M. and Leung, C. and Lin, Hsiu-Hsien and Masui, K. and Mckinven, R. and Mena-Parra, J. and Meyers, B. W. and Michilli, D. and Ng, C. and Pandhi, A. and Pearlman, A. and Pen, U. and Petroff, E. and Pleunis, Z. and Rafiei-Ravandi, M. and Rahman, Mubdi and Ransom, S. and Renard, A. and Sand, K. R. and Sanghavi, P. and Scholz, P. and Shah, V. and Shin, K. and Siegel, S. and Stairs, I. and Su, Jianing and Tendulkar, S. and Vanderlinde, K. and Wang, Haochen and Wulf, D. and Zwaniga, A.}
}

Abstract

We present the discovery of 25 new repeating fast radio burst (FRB) sources found among CHIME/FRB events detected between 2019 September 30 and 2021 May 1. The sources were found using a new clustering algorithm that looks for multiple events colocated on the sky having similar dispersion measures (DMs). The new repeaters have DMs ranging from ∼220 to ∼1700 pc cm−3, and include sources having exhibited as few as two bursts to as many as twelve. We report a statistically significant difference in both the DM and extragalactic DM (eDM) distributions between repeating and apparently nonrepeating sources, with repeaters having a lower mean DM and eDM, and we discuss the implications. We find no clear bimodality between the repetition rates of repeaters and upper limits on repetition from apparently nonrepeating sources after correcting for sensitivity and exposure effects, although some active repeating sources stand out as anomalous. We measure the repeater fraction over time and find that it tends to an equilibrium of 2.6−2.6+2.9 % over our total time-on-sky thus far. We also report on 14 more sources, which are promising repeating FRB candidates and which merit follow-up observations for confirmation.