English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Very Large Array Sky Survey (VLASS) is observing the entire sky north of$-40^{\circ}$ in the S-band ($2<\nu<4\,$GHz), with the highest angularresolution ($2''.5$) of any all-sky radio continuum survey to date. VLASS willcover its entire footprint over three distinct epochs, the first of which hasnow been observed in full. Based on Quick Look images from this first epoch, wehave created a catalog of $1.9\times10^{6}$ reliably detected radio components.Due to the limitations of the Quick Look images, component flux densities areunderestimated by $\sim 15\,\%$ at $S_{\text{peak}}>3\,$mJy/beam and are oftenunreliable for fainter components. We use this catalog to perform statisticalanalyses of the $\nu \sim 3\,$GHz radio sky. Comparisons with the Faint Imagesof the Radio Sky at Twenty cm survey (FIRST) show the typical $1.4-3\,$GHzspectral index, $\alpha$, to be $\sim-0.71$. The radio color-color distributionof point and extended components is explored by matching with FIRST and theLOFAR Two Meter Sky Survey. We present the VLASS source counts, $dN/dS$, whichare found to be consistent with previous observations at $1.4$ and $3\,$GHz.Resolution improvements over FIRST result in excess power in the VLASStwo-point correlation function at angular scales $\lesssim 7''$, and in$18\,\%$ of active galactic nuclei associated with a single FIRST componentbeing split into multi-component sources by VLASS.

A Quick Look at the $3\,$GHz Radio Sky I. Source Statistics from the Very Large Array Sky Survey