Comparison of multifrequency positions of extragalactic sources from ICRF3 and Gaia EDR3 N. Liu, S. B. Lambert, P. Charlot, Z. Zhu, J.-C. Liu, N. Jiang, X.-S. Wan and C.-Y. Ding A&A, 652 (2021) A87 Published online: 13 August 2021 DOI: 10.1051/0004-6361/202038179