Notes. ^(a) Primary beam corrected fluxes in mJy as listed in Table B.1. For sources 42, 119, 137 and 139 it was not possible primary beam correct the fluxes at both bands (see Sect. 3), resulting in not usable spectral indices. The spectral index α is defined in Eq. (2). ^(b) Source sizes in arcsec determined as , with θ_major and θ_minor listed in Table B.2. Upper limits corresponds to sources for which we could not determine a deconvolved source size. The source size index β is defined in Eq. (2). ^(c) Association of the radio continuum source with outflow and shock activity. The associations correspond to (i) molecular outflows, with the outflow momentum rate Ṗ_out given in units of M_⊙ yr⁻¹ km s⁻¹ (from López-Sepulcre et al. 2010; Sánchez-Monge et al. 2013b), with the dagger indicating those radio continuum sources located within the outflow lobes and not at the center of the outflow, (ii) EGOs (or extended green objects), based on the catalog of Cyganowski et al. (2008, questionmarks indicate the presence of bright Spitzer/IRAC 4.5 μm emission although without confirmation of the object being an EGO), and (iii) H₂ O and CH₃ OH masers, as listed in Table 2. Source 137, marked with a double cross, is associated with molecular outflow emission (Hatchell et al. 2001; Liu et al. 2013), but no outflow momentum rate has been reported. ^(d) Sources not observed in the K band. For these sources we do not have information on the K-band flux and presence of H₂O masers. ^(e)Sources detected at both frequency bands and for which we have created new images using a common uv-range that allows us to sample similar spatial scales. Fluxes and source sizes for these sources are taken from Table B.3. Fluxes for source 137 can not be primary beam corrected and cannot be used to determine a spectral index.