Table · dataset · 2023
GMRT 610-MHz survey of ELAIS N1
Listed in IVOA Registry (Virtual Observatory)
In this paper, we present a wide-area 610-MHz survey of the ELAIS N1 field with the GMRT, covering an area of 12.8deg^2^ at a resolution of 6arcsec and with an rms noise of ~40{mu}Jy/beam.
Description
This is equivalent to ~20{mu}Jy/beam rms noise at 1.4GHz for a spectral index of -0.75. The primary goal of the survey was to study the polarized sky at sub-mJy flux densities at <GHz frequencies, along with a range of other science goals such as investigations into the nature of the low-frequency {mu}Jy source populations and alignments of radio jets.
A total of 6400 sources were found in this region, the vast majority of them compact. The sample jointly detected by GMRT at 610MHz and by VLA FIRST at 1.4GHz has a median spectral index of -0.85+/-0.05 and a median 610-MHz flux density of 4.5mJy. This region has a wealth of ancillary data, which is useful to characterize the detected sources.
Read the rest (2 more)
The multiwavelength crossmatching resulted optical/IR counterparts to ~90 per cent of the radio sources, with a significant fraction having at least photometric redshift. Due to the improved sensitivity of this survey over preceding ones, we have discovered six giant radio sources (GRSs), with three of them at z~1 or higher. This implies that the population of GRS may be more abundant and common than known to date and if true, this has implications for the luminosity function and the evolution of radio sources.
We have also identified several candidate-extended relic sources.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/497/5383 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020MNRAS.497.5383I ui.adsabs.harvard.edu/abs/2020MNRAS.497.5383I ↗
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/mnras/497/5383 ↗
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/mnras/497/5383 | 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 |