Combined optical-IR flux for our counterpart OGLE-III 14642 at two epochs. a) a historical data set (1999-2002) – solid symbols; b) data set from the time of outburst (Nov.-Dec. 2009) – open symbols. See text for details of the observations. Both data sets are compared to a Kurucz model atmosphere for a B2V star in which this stellar model has been normalised to the outburst B-band point.