Fast radio burst - persistent radio source systems I. A 1.2 GHz search and catalog definition
Abstract
We present new $1.26$ GHz observations of 24 fast radio bursts (FRBs; 9 repeaters and 11 one-offs), conducted with the upgraded Giant Meter Wave Radio Telescope (uGMRT) at arc-second angular scale resolution, and combined them with literature data to construct an extended sample of 75 sources with either persistent luminosity measurements or upper limits. Our catalog is complete down to a 1029 erg s−1 Hz−1 luminosity threshold, which corresponds to the value of the first-discovered PRS, associated with FRB 20121102. We detect compact radio emission in six FRB fields, two of which are previously known PRSs and four are new candidates. The four new candidates are associated with three new repeating FRBs and one apparently one-off source. We computed the PRS occurrence using the whole catalog of 75 FRBs and found that PRSs more luminous than 1029 erg s−1 Hz−1 are rare. Unless otherwise stated, all uncertainties and upper limits are reported at the 95% confidence level (CL). If we only consider confirmed PRSs, we find an occurrence of fall = 0.06+0.09−0.03, while including PRS candidates as well yields fall = 0.14+0.22−0.08. We also compute the PRS occurrence in the two classes of FRBs: repeating and non-repeating. In the conservative case, i.e., when none of the new PRS candidates are considered to be associated with their FRBs, we find no preferred association between the PRSs and FRB class, with an occurrence of fr = 0.14+0.20−0.09 for the sample of repeating FRBs and fnr ≤ 0.12 for the sample of one-off sources. In the inclusive case, i.e., when all the new candidates are considered confirmed PRSs, we find fr = 0.27+0.21−0.14 and fnr = 0.03+0.14−0.02, with marginal (90% CL) evidence that PRSs are preferably associated with repeating FRBs.
Versions
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BibTeX
@misc{pelliciari2026fast,
title = {{Fast radio burst - persistent radio source systems I. A 1.2 GHz search and catalog definition}},
author = {D. Pelliciari and L. Bruno and G. Bernardi and M. Pilia and P. Esposito and L. Beduzzi and A. Geminardi and O. Smirnov},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.35729},
eprint = {2609.35729},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.35729},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Fast radio burst - persistent radio source systems I. A 1.2 GHz search and catalog definition
AU - D. Pelliciari
AU - L. Bruno
AU - G. Bernardi
AU - M. Pilia
AU - P. Esposito
AU - L. Beduzzi
AU - A. Geminardi
AU - O. Smirnov
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.35729
UR - https://arxiv.org/abs/2609.35729
AB - We present new $1.26$ GHz observations of 24 fast radio bursts (FRBs; 9 repeaters and 11 one-offs), conducted with the upgraded Giant Meter Wave Radio Telescope (uGMRT) at arc-second angular scale resolution, and combined them with literature data to construct an extended sample of 75 sources with either persistent luminosity measurements or upper limits. Our catalog is complete down to a 10^29 erg s^−1 Hz^−1 luminosity threshold, which corresponds to the value of the first-discovered PRS, associated with FRB 20121102. We detect compact radio emission in six FRB fields, two of which are previously known PRSs and four are new candidates. The four new candidates are associated with three new repeating FRBs and one apparently one-off source. We computed the PRS occurrence using the whole catalog of 75 FRBs and found that PRSs more luminous than 10^29 erg s^−1 Hz^−1 are rare. Unless otherwise stated, all uncertainties and upper limits are reported at the 95% confidence level (CL). If we only consider confirmed PRSs, we find an occurrence of f_all = 0.06^+0.09_−0.03, while including PRS candidates as well yields f_all = 0.14^+0.22_−0.08. We also compute the PRS occurrence in the two classes of FRBs: repeating and non-repeating. In the conservative case, i.e., when none of the new PRS candidates are considered to be associated with their FRBs, we find no preferred association between the PRSs and FRB class, with an occurrence of f_r = 0.14^+0.20_−0.09 for the sample of repeating FRBs and f_nr ≤ 0.12 for the sample of one-off sources. In the inclusive case, i.e., when all the new candidates are considered confirmed PRSs, we find f_r = 0.27^+0.21_−0.14 and f_nr = 0.03^+0.14_−0.02, with marginal (90% CL) evidence that PRSs are preferably associated with repeating FRBs.
ER -