PhysicsarXiv
Heuristic editor, no API keyVerdict: NotableFast radio burst - persistent radio source systems I. A 1.2 GHz search and catalog definition
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…
Key numbers
- 95 % confidence level
- 90 % CL
VerdictWorth a reader's time today.
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 f_rm all = 0.06⁺0.09_-0.03, while including PRS candidates as well yields f_rm 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_rm r = 0.14⁺0.20_-0.09 for the sample of repeating FRBs and f_rm 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_rm r = 0.27⁺0.21_-0.14 and f_rm nr = 0.03⁺0.14_-0.02, with marginal (90% CL) evidence that PRSs are preferably associated with repeating FRBs.
The editor's rubric
| Dimension | Level | Weight | What that level means |
|---|---|---|---|
| Leverage | ███░░ 3 | 18% | A method or resource many groups across the field will adopt within a year. |
| Magnitude | ██░░░ 2 | 20% | Solid incremental gain on a meaningful problem. |
| Evidence | ███░░ 3 | 22% | Solid: multiple benchmarks or cohorts, ablations, fair baselines, released code or data. |
| Novelty | ███░░ 3 | 22% | A genuinely new approach to an open problem. |
| Trajectory | ██░░░ 2 | 10% | Some room to improve with obvious engineering. |
| Stakes | ██░░░ 2 | 8% | Benefits a professional community (practitioners, clinicians, engineers). |
Editor’s rationale
Heuristic triage from title and abstract text only, not a reading of the paper. Cues found: method (we propose, we report); novelty (discovery); verification (error bars, independent replication); scale (scalable); stakes (climate).
How the score was computed
- Merit
- 5.2 / 10
- Adjusted merit
- 4.5 / 10
- Attention
- 0%
- Freshness
- 84%
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