Presence of Galactic cirri in the field of view of NGC 1042. The figure compares the optical emission obtained using LBT with the 350 μm map produced by the Planck satellite (Planck Collaboration I 2014). The location of the dust emission in the Planck channel is qualitatively similar to the position of the lower right extended feature in the optical map. This suggests that the origin of that extended emission could be produced (at least partially) by dust cirri in our own Galaxy.