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Table 1

Line fluxesa and column densities.

Species Transition T mb rms Integrated area Column densityc Column densityc Column densityc
(mK) (mK) (K km s-1) (cm-2) (cm-2) (cm-2)
Tex = 5 K Tex = 4 K Tex = 8 K
AA-CH3OCH3 414−303 55 7 0.026  ±  0.005 (3.32  ±  0.74) 1012 (5.08  ±  1.12) 1012 (2.49  ±  0.55) 1012
EE-CH3OCH3 414−303 90 7 0.037  ±  0.005 (6.81  ±  0.92) 1012 (10.4  ±  1.40) 1012 (5.11  ±  0.69) 1012
EA-CH3OCH3 414−303 36b 7 0.014  ±  0.003 (1.65  ±  0.55) 1012 (2.53  ±  0.84) 1012 (1.24  ±  0.41) 1012
AE-CH3OCH3 414−303 22b 7 0.009  ±  0.003 (1.67  ±  0.37) 1012 (2.55  ±  0.56) 1012 (1.25  ±  0.28) 1012
E-CH3CHO 514−413 125 3 0.149  ±  0.015 (9.12  ±  0.92) 1012 (2.67  ±  0.27) 1013 (2.12  ±  0.21) 1012
A-CH3CHO 514−413 110 4 0.137  ±  0.014 (8.26  ±  0.84) 1012 (1.73  ±  0.18) 1013 (3.86  ±  0.39) 1012
A-CH3OCHO 817−716 20 3 0.025  ±  0.005 (2.01  ±  0.40) 1013 (5.73  ±  1.15) 1013 (5.91  ±  1.18) 1012
A-CH3OCHO 909−808 12 2 0.016  ±  0.005 (1.73  ±  0.54) 1013 (5.50  ±  1.71) 1013 (4.33  ±  1.35) 1012
E-CH3OCHO 817−716 19 3 0.024  ±  0.005 (1.90  ±  0.40) 1013 (5.44  ±  1.15) 1013 (5.59  ±  1.18)1012
E-CH3OCHO 909−808 12 2 0.016  ±  0.003 (1.72  ±  0.32) 1013 (5.47  ±  1.03) 1013 (4.32  ±  0.81) 1012
o-CH2CO 515−414 140 3 0.171  ±  0.018 (1.50  ±  0.16) 1013 (3.09  ±  0.33) 1013 (6.75  ±  0.71) 1012
p-CH2CO 505−404 82 2 0.096  ±  0.010 (4.54  ±  0.47) 1012 (9.64  ±  1.00) 1012 (1.95  ±  0.20) 1012

Notes. 

(a)

The fluxes were derived by fitting Gaussians to the lines using the dedicated CLASS routine. The uncertainty was calculated as , where σstat is the statistical uncertainty in the Gaussian fit (given by the CLASS routine) and σcal is the calibration uncertainty taken as 10%.

(b)

Both EA- and AE- CH3OCH3 lines are so close in frequency that they are indistinguishable in our spectra. In the table, we assume that the ratio of their intensities was equal to the ratio of their upper level degeneracy because the transitions have nearly equal frequencies, Einstein coefficients, and equal level energies. This hypothesis is supported by it also applying to the EE- and AA- transitions (the ratio of their respective intensities is consistent with the ratio of their respective upper level degeneracies).

(c)

The column densities in Cols. (6)–(8) are those of the corresponding substates listed in Col. (1), as derived from the line fluxes given in Col. (5).

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