Open Access

Table 3

Detection rates as they vary with EB−Vand confidence level.

2σ limits

Species All 0.0..0.067 0.067..0.125 EB−V
0.125..0.250
0.250..0.5 0.5..1.0 1.0..2.0 2.0..7.345
HCO+ 72/86 0/4 8/12 10/16 24/24 17/17 6/6 7/7
C2H 53/76 0/4 6/11 8/17 17/21 14/15 4/4 4/4
HCN 38/57   4/7 4/10 12/21 12/13 2/2 4/4
CS 7/24   1/3 0/2 1/9 1/4 1/2 3/4
HCO 4/46   0/6 1/10 1/20 2/10    

3σ limits

Species All 0.0..0.067 0.067..0.125 EB−V
0.125..0.250
0.250..0.5 0.5..1.0 1.0..2.0 2.0..7.345

HCO+ 71/86 0/4 8/12 9/16 24/24 17/17 6/6 7/7
C2H 45/76 0/4 2/11 6/17 15/21 14/15 4/4 4/4
HCN 32/57   1/7 4/10 10/21 11/13 2/2 4/4
CS 7/24   1/3 0/2 1/9 1/4 1/2 3/4
HCO 2/46   0/6 1/10 0/20 1/10    

Notes. Entries are #sight lines where detected/#sight lines observed.

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