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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2212.11941 (astro-ph)
[Submitted on 22 Dec 2022]

Title:Sub-arcminute localization of 13 repeating fast radio bursts detected by CHIME/FRB

Authors:Daniele Michilli, Mohit Bhardwaj, Charanjot Brar, Chitrang Patel, B.M. Gaensler, Victoria M. Kaspi, Aida Kirichenko, Kiyoshi W. Masui, Ketan R. Sand, Paul Scholz, Kaitlyn Shin, Ingrid Stairs, Tomas Cassanelli, Amanda M. Cook, Matt Dobbs, Fengqiu Adam Dong, Emmanuel Fonseca, Adaeze Ibik, Jane Kaczmarek, Calvin Leung, Aaron B. Pearlman, Emily Petroff, Ziggy Pleunis, Masoud Rafiei-Ravandi, Pranav Sanghavi, Shriharsh P. Tendulkar
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Abstract:We report on improved sky localizations of thirteen repeating fast radio bursts (FRBs) discovered by CHIME/FRB via the use of interferometric techniques on channelized voltages from the telescope. These so-called 'baseband localizations' improve the localization uncertainty area presented in past studies by more than three orders of magnitude. The improved localization regions are provided for the full sample of FRBs to enable follow-up studies. The localization uncertainties, together with limits on the source distances from their dispersion measures (DMs), allow us to identify likely host galaxies for two of the FRB sources. FRB 20180814A lives in a massive passive red spiral at z~0.068 with very little indication of star formation, while FRB 20190303A resides in a merging pair of spiral galaxies at z~0.064 undergoing significant star formation. These galaxies show very different characteristics, further confirming the presence of FRB progenitors in a variety of environments even among the repeating sub-class.
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Cite as: arXiv:2212.11941 [astro-ph.HE]
  (or arXiv:2212.11941v1 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2212.11941
Related DOI: https://doi.org/10.3847/1538-4357/accf89

Submission history

From: Daniele Michilli [view email]
[v1] Thu, 22 Dec 2022 18:21:58 UTC (2,005 KB)
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