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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The KVN(Korean VLBI Network)-style simultaneous multi-frequency receivingmode is demonstrated to be promising for mm-VLBI observations. Recently, otherVery long baseline interferometry (VLBI) facilities all over the globe start toimplement compatible optics systems. Simultaneous dual/multi-frequency VLBIobservations at mm wavelengths with international baselines are thus possible.In this paper, we present the results from the first successful simultaneous22/43 GHz dual-frequency observation with KaVA(KVN and VERA array), includingimages and astrometric results. Our analysis shows that the newly implementedsimultaneous receiving system has brought a significant extension of thecoherence time of the 43 GHz visibility phases along the internationalbaselines. The astrometric results obtained with KaVA are consistent with thoseobtained with the independent analysis of the KVN data. Our results thusconfirm the good performance of the simultaneous receiving systems for thenon-KVN stations. Future simultaneous observations with more global stationsbring even higher sensitivity and micro-arcsecond level astrometricmeasurements of the targets.

Source-Frequency Phase-Referencing Observation of AGNs with KaVA Using Simultaneous Dual-Frequency Receiving