The Gravitational-wave Optical Transient Observer (GOTO)

TL;DR

GOTO is a fully operational wide-field telescope network designed to rapidly identify optical counterparts to gravitational-wave events, enhancing multi-messenger astronomy with automated discovery and citizen science contributions.

Contribution

The paper presents the design, deployment, and operational status of the GOTO network, a novel wide-field telescope system for gravitational-wave counterpart detection.

Findings

GOTO has two operational sites with 88 sq. deg. field-of-view each.

The network can survey the entire sky every 2-3 days.

GOTO has already produced significant scientific results and citizen science engagement.

Abstract

The Gravitational-wave Optical Transient Observer (GOTO) is a project dedicated to identifying optical counter-parts to gravitational-wave detections using a network of dedicated, wide-field telescopes. After almost a decade of design, construction, and commissioning work, the GOTO network is now fully operational with two antipodal sites: La Palma in the Canary Islands and Siding Spring in Australia. Both sites host two independent robotic mounts, each with a field-of-view of 44 square degrees formed by an array of eight 40 cm telescopes, resulting in an instantaneous 88 square degree field-of-view per site. All four telescopes operate as a single integrated network, with the ultimate aim of surveying the entire sky every 2-3 days and allowing near-24-hour response to transient events within a minute of their detection. In the modern era of transient astronomy, automated telescopes like GOTO form a vital link between multi-messenger discovery facilities and in-depth follow-up by larger telescopes. GOTO is already producing a wide range of scientific results, assisted by an efficient discovery pipeline and a successful citizen science project: Kilonova Seekers.