Broad-band spectral energy distribution (SED) of 3C 111. The VLBA, IRAM, and SMA flux-density points are weighted averages over the time range probed in this paper (2007–2012). We show integrated core+jet flux densities from the VLBA and the SMA. The WISE (Wright et al. 2010) and 2MASS (Skrutskie et al. 2006) data are extracted from the All-Sky Source Catalog. The UV and X-ray data result from observations with Swift/UVOT and XRT (Burrows et al. 2005) on 2008-11-16. The hard X-ray INTEGRAL/IBIS/ISGRI spectrum has been obtained in the time-interval considered in this paper using the HEAVENS online tool (Walter et al. 2010). The black, solid curve represents a model of an incident power-law (upper dashed curve) that is being reprocessed in an accretion disk (lower dashed curve with prominent emission features). The residuals corresponding to the (hard) X-ray model are shown in the bottom panel. We can fit the XRT data well in combination with reflected emission from the accretion disk using xillver (García et al. 2013) and find χ (d.o.f.) = 47 (34). The statistics worsen when including the INTEGRAL data due to their scatter and systematic uncertainties that are not included here.