Top: 0.85–2.5 micron spectrum of V838 Mon on 11 December 2013 corrected for extinction using E(B − V) = 0.5. For comparison, we show the AMBER longest baseline visibility (thick black lines, right axis), and indicate with arrows the wavelengths of Fig. 2. Bottom: spectra extracted from the AMBER data according to a downgraded resolution version of the above spectrum (black line). Red dashed line: the star spectrum. Blue dotted line: extended emission spectrum.