Table · dataset · 2017
Spectral flux densities from 50MHz to 50GHz
Listed in IVOA Registry (Virtual Observatory)
The flux-density scale of Perley & Butler (2013ApJS..204...19P) is extended downward to ~50MHz by utilizing recent observations with the Karl G. Jansky Very Large Array (VLA) of 20 sources between 220MHz and 48.1GHz, and legacy VLA observations at 73.8MHz.
Description
The derived spectral flux densities are placed on an absolute scale by utilizing the Baars+ (1977A&A....61...99B) values for Cygnus A (3C405) for frequencies below 2GHz, and the Mars-based polynomials for 3C286, 3C295, and 3C196 from Perley & Butler above 2GHz.
Polynomial expressions are presented for all 20 sources, with accuracy limited by the primary standards to 3%-5% over the entire frequency range. Corrections to the scales proposed by Perley & Butler, and by Scaife & Heald (2012MNRAS.423L..30S) are given.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/230/7 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2017ApJS..230....7P ui.adsabs.harvard.edu/abs/2017ApJS..230....7P ↗
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/apjs/230/7 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Space sciences 72%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apjs/230/7 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5109 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| 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 |