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

Long baseline radio interferometers can provide some interestingopportunities for future SETI searches. Known advantages (compared to singledishes or beam-formed arrays), include the large reduction in false-positivesdue to the interferometer's natural suppression of RFI. This paper presentsother advantages - the presence of multiple interferometer baselines in anarray provide an important level of redundancy and additional confidence(verification) in the detection of faint and potentially transient signals. TheSETI requirement for high time and frequency resolution is well matched towide-field VLBI techniques that permits the simultaneous analysis of thousandsof potential SETI targets within the field-of-view. Searching for a SETI signalin the image plane has the important advantage that the signal location on thesky is likely to be invariant on short timescales - this is a useful constraintwhen potentially almost everything else could be changing (eg frequency driftdue to Doppler accelerations). Using archive data, we demonstrate how VLBI canbe used to conduct SETI searches. We target two targets within the field ofview - a galactic star and a galaxy at a redshift of 0.14. We place coarseupper limits on any SETI signals from the two SETI targets, and note that whilethe EIRP associated with the galaxy is comparable to the energy resources of aKardashev Type 2 civilisation, a distributed array of coherent transmitterswith excellent forward gain, could reduce this to more modest levels. Wetherefore argue that targeted observations of extragalactic sources may also bemerited by interferometer surveys. Using VLBI to study the precise location andmotion of confirmed SETI signals is also discussed.

SETI surveys of the nearby and distant universe employing wide-field radio interferometry techniques