Photospheric and chromospheric activity in V405 Andromedae - An M dwarf binary with components on the two sides of the full convection limitK. Vida, K. Oláh, Zs. Kővári, H. Korhonen, J. Bartus, Zs. Hurta and K. PosztobányiA&A, 504 3 (2009) 1021-1029DOI: https://doi.org/10.1051/0004-6361/200912326