Table 1
Column densities of water and methanol ice.
| # | WISE ID | (J2000) | W1 | AV (Her) | AV (SED) | AV (CE) | Int. | τ3.0 |  |
 |
CH3OHice | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RA | Dec | [mag] | [mag] | [mag] | [mag] | [min.] | [1018 cm−2] | [1017 cm−2] | [%] | |||
| 1 | J050415.91+251157.3 | 05:04:15.91 | +25:11:57.3 | 11.75 | 27.3 | 33.9 | 36.4 | 146 | 1.99  |
3.33 |
<4.0 | <12.1 |
| 3 | J050421.72+251208.6 | 05:04:21.72 | +25:12:08.6 | 9.38 | 19.2 | 21.4 | 26.9 | 52 | 1.21  |
2.03 |
2.2 |
10.6 ± 0.7 |
| 5 | J050422.09+250937.8 | 05:04:22.09 | +25:09:37.8 | 11.60 | 12.4 | 8.9 | 15.9 | 58 | 0.67  |
1.12 |
<6.6 | <59.0 |
Notes. ID: numbering of sources in Fig. 1. W1: photometry from the AllWISE catalog at the wavelength λ = 3.4 μm. AV (Her): visual extinction measured based on the extinction map calculated from Herschel/SPIRE images. AV (SED): visual extinction measured based on the comparison of the infrared SEDs of the objects with stellar photospheric model. AV (CE): visual extinction measured based on the color-dependent extinction of the background stars in the infrared. Int.: on-source integration time in minutes. τ3.0 : peak optical depth of water ice at 3.0 μm. The uncertainties are for 1 σ.
: column density of water ice. CH3OHice: fraction of methanol ice with respect to water ice. The upper limits are for 3σ.
: column density of methanol ice.
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