Efficiency of solar microflares in accelerating electrons when rooted in a sunspot Jonas Saqri, Astrid M. Veronig, Andrea Francesco Battaglia, Ewan C. M. Dickson, Dale E. Gary and Säm Krucker A&A, 683 (2024) A41 Published online: 04 March 2024 DOI: 10.1051/0004-6361/202348295