“…Recent radio, NIR and X‐ray observations have detected variable and polarized emission and give detailed insight into the physical emission mechanisms at work in Sgr A* (e.g. Baganoff et al 2001, 2002, 2003; Eckart et al 2002, 2004, 2006, 2008, 2009; Genzel et al 2003; Goldwurm et al 2003; Porquet et al 2003, 2009; Ghez et al 2004a,b; Reid et al 2004; Eisenhauer, Genzel & Alexander 2005; Belanger et al 2006; Yusef‐Zadeh et al 2006a,b, 2007, 2008, 2009; Hornstein et al 2007; Marrone et al 2008; Sabha et al 2010). Sgr A*– in terms of Eddington luminosity – is the faintest supermassive black hole known.…”