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Table 2

Spectroscopic parameters of the CO lines used.

12C17O

Wavelength (Å) χ(eV) log gf

23 293.708 0.24 –5.459
23 309.863 0.21 –5.492
23 327.600 0.18 –5.526
23 336.800 0.17 –5.545
23 357.178 0.15 –5.582
23 390.326 0.11 –5.644
23 402.170 0.10 –5.666

12C18O

23 486.605 0.57 –5.234
23 486.711 0.67 –5.190
23 492.840 0.48 –5.281
23 502.300 0.84 –5.117
23 639.334 0.13 –5.618
23 650.494 0.12 –5.639
23 785.335 0.72 –4.814
23 795.024 0.66 –4.852
23 799.058 0.64 –4.865
23 799.281 0.03 –5.935
23 976.376 0.35 –5.224
23 989.236 0.34 –5.248

Notes. Wavelengths are in air.

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