Radio emission in ultracool dwarfs: The nearby substellar triple system VHS 1256–1257 J. C. Guirado, R. Azulay, B. Gauza, M. A. Pérez-Torres, R. Rebolo, J. B. Climent and M. R. Zapatero Osorio A&A, 610 (2018) A23 Published online: 19 February 2018 DOI: 10.1051/0004-6361/201732130