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Table 2

Number of glycolaldehyde lines and results of the LTE analysis for the detected sources.

Source Ntrans Eu Trot Ntot
(K) (K) (1014 cm-2)

IRAS2A1 13 37–318 159(24) 46(20)
IRAS4A2 18 37–375 236(74) 88(70)
IRAS4B1 13 37–271 152(35) 15(9)
SVS13-A 11 37–375 115(13) 21(8)

Notes. In several cases (3 for IRAS2A1, 1 for IRAS4A2, IRAS4B1, and SVS13-A; see Tables A.1 to A.4), the detected lines are due to two glycolaldehyde transitions at frequencies blended at the present spectral resolution.

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