Table 2: Integrated fluxes of H2CO lines in $T_{\rm mb} ~ {\rm d}V$ units. Upper limits are given as 2 $\sigma $. The "-'' symbol indicates lack of the relevant observation.
  o-H2CO   p-H2CO
Transition 21,2-11,1 41,4-31,3 51,5-41,4   30,3-20,2 32,2-22,1 50,5-40,4 52,4-42,3 54,2-44,1a
Eu (K) 21.9 45.6 62.4   21.0 68.1 52.2 96.7 234
Au,l (s-1) 5.4 $\times$ 10-5 6.0 $\times$ 10-4 1.2 $\times$ 10-3   2.9 $\times$ 10-4 1.6 $\times$ 10-4 1.4 $\times$ 10-3 1.2 $\times$ 10-3 5.0 $\times$ 10-4
$\nu$ (GHz) 140.839 281.527 351.769   218.222 218.476 362.736 363.946 364.103
gu 5 9 11   7 7 11 11 11
Telescope IRAM IRAM JCMT   IRAM IRAM JCMT JCMT JCMT
HPBW ('') 17 9 14   11 11 14 14 14
$\eta_{\rm mb}$ or $B_{\rm eff}$/ $F_{\rm eff}$ 0.74 0.47 0.63   0.62 0.62 0.63 0.63 0.63
NGC 1333-IRAS 4A 9.1 $\pm$ 1.4 10.6 $\pm$ 2.6 5.5 $\pm$ 1.2   9.3 $\pm$ 1.9 2.2 $\pm$ 0.4 2.9 $\pm$ 1.0 1.2 $\pm$ 0.6 1.7 $\pm$ 0.9
NGC 1333-IRAS 4B 6.8 $\pm$ 1.0 12.1 $\pm$ 3.0 7.5 $\pm$ 1.7   9.6 $\pm$ 1.9 4.7 $\pm$ 1.0 5.9 $\pm$ 2.1 3.6 $\pm$ 1.0 0.9 $\pm$ 0.6
NGC 1333-IRAS 2 4.3 $\pm$ 0.6 5.8 $\pm$ 1.5 1.6 $\pm$ 0.4   4.9 $\pm$ 1.0 1.0 $\pm$ 0.2 1.8 $\pm$ 0.6 0.6 $\pm$ 0.4 <0.4
L1448-MM 3.3 $\pm$ 0.7 4.7 $\pm$ 1.1 1.0 $\pm$ 0.2   3.4 $\pm$ 0.6 0.4 $\pm$ 0.1 1.3 $\pm$ 0.4 0.2 $\pm$ 0.1 <0.1
L1448-N 7.9 $\pm$ 0.9 6.9 $\pm$ 1.6 3.8 $\pm$ 0.9   5.7 $\pm$ 0.9 - - 0.6 $\pm$ 0.2 -
L1157-MM 1.2 $\pm$ 0.2 2.1 $\pm$ 0.5 1.2 $\pm$ 0.3   1.1 $\pm$ 0.3 <0.2 0.5 $\pm$ 0.2 <0.1 <0.1
L1527 2.8 $\pm$ 0.7 4.5 $\pm$ 1.1 1.0 $\pm$ 0.3   3.0 $\pm$ 1.3 0.2 $\pm$ 0.1 0.4 $\pm$ 0.2 - -
VLA1623 3.8 $\pm$ 1.2 2.7 $\pm$ 1.2 0.9 $\pm$ 0.2   5.0 $\pm$ 1.5 - 1.2 $\pm$ 0.4 <0.2 <0.3


a Blended with the 54,1-44,0 H2CO line.


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