All Tables

Table 1: Characteristics of the sources.
Table 2: Summary of the observations and infrared fluxes taken from the literature (The companion objects are located within 30 $^{\prime \prime }$ from the main source).
Table 3: Ice column densities. The errors are at 3 $\sigma$ level and are dominated by systematics.
Table 4: Ice abundances relative to water ice.
Table 5: CO-ice band optical depth and column density derived from the phenomenological decomposition.
Table 6: Estimation of the visual extinction by the 9.7 $\mu$ m optical depth, the near-infrared excess and the SED fitting method.