# Coordinating observations among ground and space-based telescopes in the multi-messenger era

## TL;DR

This paper proposes standardizing the exchange of scheduling and visibility information among ground and space telescopes using VO protocols to enhance multi-messenger astronomy collaborations.

## Contribution

It introduces a standardized framework for sharing and automating observational schedules and visibility checks across multiple observatories.

## Key findings

- Development of VO-based services for schedule sharing
- Implementation of visibility servers for various facilities
- Facilitation of automated, multi-facility observation planning

## Abstract

The emergence of time-domain multi-messenger (astro)physics requires for new, improved ways of interchanging scheduling information, in order to allow more efficient collaborations between the various teams. Currently space- and ground-based observatories provide target visibilities and schedule information via dedicated web pages in various, (observatory-specific) formats. With this project we aim to: i) standardise the exchange of information about observational schedules and instrument set-ups, and ii) standardise the automation of visibility checking for multiple facilities. To meet these goals, we propose to use VO protocols (ObsTAP-like) to write the services necessary to expose these data to potential client applications and to develop visibility servers across the different facilities.