Table A.1: Log of the observations used.
Transition Observing ISO TDT LWS Resolution
  Mode Number Detector (km s-1)
$^{{\bf 12}}$CH and $^{{\bf 13}}$CH Sgr B2
J=3/2-1/2 (149 $\mu $m) L03 50700208 LW3 36
(& para-CH2 312-303a) L03 84500102 LW3 36
  L03 50600603 LW3 36
  L03 50600814 LW4 36
  L03 50900521 LW4 36
J=3/2-5/2 (115 $\mu $m)a L03 50601013 LW2 34
ortho-CH $_{{\bf 2}}$ Sgr B2
111-000 (127 $\mu $m) L03 50700511 LW2 34
  L03 50800819 LW3 34
  L04 47600907 LW2 34
211-202 (153 $\mu $m)a L03 50700208 LW4 35
  L03 50800317 LW4 35
  L03 50400823 LW4 35
  L03 50600405 LW3 35
  L03 83600317 LW3 35
313-202 (94 $\mu $m) L03 50800218 LW1 34
  L03 50400823 LW1 34
  L03 50700610 LW1 34
220-111 (50 $\mu $m)a L03 50800218 SW2 64
para-CH $_{{\bf 2}}$ Sgr B2
110-101 (156 $\mu $m)b L03 50700707 LW4 35
  L03 50700610 LW4 35
  L03 50800317 LW4 35
212-101 (107 $\mu $m) L03 50800515 LW2 32
  L03 50800819 LW2 32
221-110 (51 $\mu $m)a L03 50800216 SW2 64
  L03 50600814 SW2 64
  L03 50700511 SW2 64
  L03 50900521 SW2 64
CH $_{{\bf 2}}$ W49 N
111-000 (127 $\mu $m) L04 49900406 LW2 34
212-101 (107 $\mu $m)a L04 49900406 LW2 32
CH W49 N
J=3/2-1/2 (149 $\mu $m) L01 52700702 LW4 1200
CH $_{{\bf 2}}$ Sgr A $^{{\bf\ast}}$
111-000 (127 $\mu $m)a L03 50900204 LW2 34
212-101 (107 $\mu $m)a L03 50800902 LW2 32
  L03 85000139 LW2 32
  L03 50900444 LW1 32
  L03 85000247 LW1 32
CH Sgr A $^{{\bf\ast}}$
J=3/2-1/2 (149 $\mu $m) L03 84900448 LW3 34
CH $_{{\bf 2}}$ NGC 7023 (3 different positions)
111-000 (127 $\mu $m)a L04 33901603 LW2 34
  L04 34601501 LW2 34
  L04 56000208 LW2 34
a Not detected.
b Blended with NH line.


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