4MOST Survey Strategy Plan

G. Guiglion, Chiara Battistini, C.~P.~M. Bell, Thomas Bensby, Thomas Boller, Cristina Chiappini, Johan Comparat, N. Christlieb, Ross Church, Maria-Rosa Cioni, L. Davies, Tom Dwelly, R. S. de Jong, Sofia Feltzing, Alain Gueguen, Louise Howes, M. Irwin, Iryna Kushniruk, M Lam, J. LiskeRichard McMahon, Andrea Merloni, P. Norberg, A.~S.~G. Robotham, Olivier Schnurr, J. Sorce, E. Starkenburg, Jesper Storm, Elizabeth Swann, E. Tempel, W. -F. Thi, C. C. Worley, C.~J. Walcher

Research output: Contribution to journalArticle


The current status of and motivation for the 4MOST survey strategy, as developed by the Consortium science team, are presented here. Key elements of the strategy are described, such as sky coverage, number of visits and total exposure times in different parts of the sky, and how to deal with different observing conditions. The task of organising the strategy is not simple, with many different surveys that have vastly different target brightnesses and densities, sample completeness levels, and signal-to-noise requirements. We introduce here a number of concepts that we will use to ensure all surveys are optimised. Astronomers who are planning to submit a Participating Survey proposal are strongly encouraged to read this article and any relevant 4MOST Survey articles in this issue of The Messenger such that they can optimally complement and benefit from the planned surveys of the 4MOST Consortium.
Original languageEnglish
Pages (from-to)17-21
Publication statusPublished - 2019 Mar

Subject classification (UKÄ)

  • Astronomy, Astrophysics and Cosmology


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