This is a copy of the published version, or version of record, available on the publisher’s website. This version does not track changes, errata, or withdrawals on the publisher’s site. Published version information: Citation: M Black et al. MOONS – multi object spectroscopy for the VLT: spectrograph performance. Proc SPIE 12184 (2022): 121847A. Is in proceedings of: Ground-based and Airborne Instrumentation for Astronomy IX, Montréal, Québec, Canada, 17-22 Jul 2022 DOI: 10.1117/12.2629802 Copyright 2022 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited. This version is made available in accordance with publisher policies. Please cite only the published version using the reference above. This is the citation assigned by the publisher at the time of issuing the APV. Please check the publisher’s website for any updates. This item was retrieved from ePubs, the Open Access archive of the Science and Technology Facilities Council, UK. Please contact epublications@stfc.ac.uk or go to http://epubs.stfc.ac.uk/ for further information and policies. MOONS – multi-object spectroscopy for the VLT: Spectrograph Performance M. Black, R. Artan, C. Breen, K. Campbell, L. Chapman, et al.