Polarisation properties of methanol masers | Astronomy & Astrophysics (A&A)

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Table 3

P_V upper limits at gΩ = 10R, for B = 10 mG.

Maser	P_V baseline ^(a)	P_V with one hyperfine
	%	transition ×10^(b)
6.2 GHz	4.2	4.9	(16 →17A)
6.7 GHz	0.22	0.63	(3 →4A)
7.7 GHz	5.4	8.3	(10 →11A)
7.8 GHz	5.4	8.3	(10 →11A)
12 GHz	0.095	0.34	(1 →2A)
20.3 GHz	3.9	4.7	(16 →17A)
21 GHz	6.0	10	(8 →9A)
25 GHz	0.014	0.098	(4 →4B) ^(c)
36 GHz	0.011	0.05	(3 →2A)
37.7 GHz	8.0	10	(6 →7B)
44 GHz	0.011	0.056	(5 →4A)
45 GHz	0.011	0.055	(1 →2B)
46 GHz	6.7	8.3	(8 →9A)

Notes. ^(a) “Baseline” indicates a fixed pumping rate equal for all the hyperfine transitions; ^(b) 10 × preferred pumping for the i → j hyperfine transition indicated between parentheses; ^(c)the same level of P_V has also been registered for the 4 →4A and 6 →6B.

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