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

We report the results of optical follow-up observations of 29gravitational-wave triggers during the first half of the LIGO-VirgoCollaboration (LVC) O3 run with the Gravitational-wave Optical TransientObserver (GOTO) in its prototype 4-telescope configuration (GOTO-4). While noviable electromagnetic counterpart candidate was identified, we estimate our 3D(volumetric) coverage using test light curves of on- and off-axis gamma-raybursts and kilonovae. In cases where the source region was observableimmediately, GOTO-4 was able to respond to a GW alert in less than a minute.The average time of first observation was $8.79$ hours after receiving an alert($9.90$ hours after trigger). A mean of $732.3$ square degrees were tiled perevent, representing on average $45.3$ per cent of the LVC probability map, or$70.3$ per cent of the observable probability. This coverage will furtherimprove as the facility scales up alongside the localisation performance of theevolving gravitational-wave detector network. Even in its 4-telescope prototypeconfiguration, GOTO is capable of detecting AT2017gfo-like kilonovae beyond200~Mpc in favourable observing conditions. We cannot currently placemeaningful electromagnetic limits on the population of distant ($\hat{D}_L =1.3$~Gpc) binary black hole mergers because our test models are too faint torecover at this distance. However, as GOTO is upgraded towards its full32-telescope, 2 node (La Palma \& Australia) configuration, it is expected tobe sufficiently sensitive to cover the predicted O4 binary neutron star mergervolume, and will be able to respond to both northern and southern triggers.

monthly notices of the royal astronomical society

Searching for Electromagnetic Counterparts to Gravitational-wave Merger  Events with the Prototype Gravitational-wave Optical Transient Observer  (GOTO-4)