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Table 3

Observed lines of CH3OH in comets ISON at rh = 0.61 au and Lovejoy at rh = 1.06 au.

Transition ν dva Δv b dva Δv b
(MHz) (K km s-1) (km s-1) (K km s-1) (km s-1)

C/2012 S1 (ISON) C/2013 R1 (Lovejoy)


153–152 A 249 419.9 0.023(6) 2.4(6)
133–132 A 250 291.2 0.047(8) 1.4(4)
110–101 A+ 250 507.0 0.132(8) 1.9(2) 0.101(7) 1.5(1)
123–122 A 250 635.2 0.057(8) 1.9(2)
113–112 A 250 924.4 0.059(8) 1.8(3) 0.038(7) 1.6(2)
103–102 A 251 164.1 0.075(10) 2.4(3) 0.034(5) 1.5(2)
93–92 A 251 359.9 0.070(8) 1.9(3) 0.063(5) 1.2(1)
83–82 A 251 517.3 0.126(8) 1.7(2) 0.072(5) 1.4(1)
73–72 A 251 641.7 0.118(8) 2.2(2) 0.088(5) 1.4(1)
63–62 A 251 738.5 0.139(8) 2.2(3) 0.116(5) 1.5(1)
53–52 A 251 811.9 0.088(8) 1.8(2) 0.110(5) 1.5(1)
43–42 A 251 866.6 0.090(10) 1.8(3) 0.098(7) 1.5(1)
53–52 A± 251 890.9 0.129(10) 2.1(2) 0.121(7) 1.7(1)
63–62 A± 251 895.7 0.141(10) 2.2(2) 0.102(7) 1.4(1)
43–42 A± 251 900.5 0.129(10) 2.1(2) 0.100(7) 1.5(1)
33–32 A 251 905.8 0.084(8) 1.8(3) 0.061(8) 1.4(3)
33–32 A± 251 917.0 0.062(8) 1.7(3)
73–72 A± 251 923.6 0.108(10) 2.3(3) 0.095(7) 1.5(1)
83–82 A± 251 984.7 0.077(8) 2.1(3) 0.064(7) 1.7(2)
93–92 A± 252 090.4 0.089(10) 2.1(2) 0.051(7) 1.3(2)
103–102 A± 252 252.8 0.097(10) 2.2(2) 0.036(5) 1.1(1)
113–112 A± 252 485.6 0.095(13) 2.9(6) 0.036(7) 1.2(4)
123–122 A± 252 803.4 0.053(12) 1.8(3) 0.016(5) 0.9(3)
2+0–1-1 E 254 015.3 0.061(8) 2.1(4)
6+1–5+2 E 265 289.6 0.060(7) 1.9(3)
5+2–4+1 E 266 838.1 0.17(2) 2.1(2) 0.184(9) 1.5(1)
9+0–8+1 E 267 403.4 0.077(12) 1.9(3) 0.071(7) 1.6(2)

Notes. Numbers in parentheses are 1σ uncertainties in units of the last digits.

(a)

Additional error due to calibration is estimated to be 10–20%.

(b)

Line width measured as FWHM.

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