Left panel: spectra obtained with Swift XRT and RXTE during nights of the 2006 MWL campaign. Only nights where spectra for both instruments could be extracted are included. For MJD 53 946 only the RXTE spectrum from the first pointing and for MJD 53947 only the spectrum from the second RXTE pointing have been included to avoid cluttering the plot. The spectra have been corrected for Galactic absorption. Right panel: nightly averaged H.E.S.S. spectra for the same selection of nights. Upper limits at 99% confidence level are indicated as arrows. No correction for absorption on the extra-galactic background has been applied. The quiescent flux is taken from Abramowski et al. (2010). The legends in both panels provide the start times of the observations in MJD – 53 000.