Table · dataset · 2026
Bursts from FAST obs. of FRB 20220912A in 2022
Listed in IVOA Registry (Virtual Observatory)
We report the observations of FRB 20220912A using the Five-hundred-meter Aperture Spherical radio Telescope (FAST).
Description
We conducted 17 observations totaling 8.67hr and detected a total of 1076 bursts with an event rate up to 390hr^-1^. The cumulative energy distribution can be well described using a broken power-law function with the lower- and higher-energy slopes of -0.38{\pm}0.02 and -2.07{\pm}0.07, respectively.
We also report the L-band (1-1.5GHz) spectral index of the synthetic spectrum of FRB 20220912A bursts, which is -2.6{\pm}0.21. The average rotation measure value of the bursts from FRB 20220912A is -0.08{\pm}5.39rad/m^2^, close to 0rad/m^2^ and was relatively stable over 2 months. Most bursts have nearly 100% linear polarization.
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About 45% of the bursts have circular polarization with Signal-to-Noise ratio >3, and the highest circular polarization degree can reach 70%. Our observations suggest that FRB20220912A is located in a relatively clean local environment with complex circular polarization characteristics. These various behaviors imply that the mechanism of circular polarization of FRBs likely originates from an intrinsic radiation mechanism, such as coherent curvature radiation or inverse Compton scattering inside the magnetosphere of the FRB engine source (e.g., a magnetar).
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/955/142 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023ApJ...955..142Z ui.adsabs.harvard.edu/abs/2023ApJ...955..142Z ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/apj/955/142 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/955/142 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:radio | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |