A quick search of the usual available-to-the public sources reveals the following extra information:
Nova Centauri 2013 = V1369 Centauri, possibly identical to a 15th magnitude star seen before the nova event. There is no reliable distance estimate yet. The rise in brightness of about 12 magnitudes (from pre-event to peak) is a factor of about 10^5, and is fairly typical compared with other classical novae.
The evidence so far suggests that the star is double, with one of the components being a white dwarf accreting mass from its partner.
The primary peak brightness for classical novae is an absolute magnitude of about -8.8; the observed peak brightness of magnitude 3.3 gives a distance/extinction factor of 12.1 magnitudes. In the absence of extinction (absorption by dust clouds etc), this corresponds to a distance of about 8600 light-years.