First detection of the J−1 → (J − 1)0 − E methanol maser transitions at J = 7 and 10

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Table 1.

Best-fit parameters from our LTE plus non-LTE modeling for CARMA-7.

Component	N(Sp)	T_kin or T_ex	FWHM	V_LSR	n_H₂	ISO	Size
	[× 10¹³ cm⁻²]	[K]	[km s⁻¹]	[km s⁻¹]	[cm⁻³]		[″]
Non-LTE	41.49 $_{- 2.48}^{+ 13.87}$ $^{+13.87}_{-2.48}$	99.60 $_{- 0.64}^{+ 4.36}$ $^{+4.36}_{-0.64}$	3.86 $_{- 0.03}^{+ 0.18}$ $^{+0.18}_{-0.03}$	0.90 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$	$7.27 \times {10^{4}}_{- 0.22}^{+ 0.23}$ $7.27\times {10^{4}}^{+0.23}_{-0.22}$	0.95 $_{- 0.02}^{+ 0.06}$ $^{+0.06}_{-0.02}$	6.28 $_{- 1.18}^{+ 0.32}$ $^{+0.32}_{-1.18}$
LTE (narrow)	79.48 $_{- 6.62}^{+ 8.77}$ $^{+8.77}_{-6.62}$	15.85 $_{- 0.21}^{+ 1.13}$ $^{+1.13}_{-0.21}$	3.36 $_{- 0.01}^{+ 0.04}$ $^{+0.04}_{-0.01}$	0.73 $_{- 0.03}^{+ 0.01}$ $^{+0.01}_{-0.03}$	–	1.33 $_{- 0.02}^{+ 0.13}$ $^{+0.13}_{-0.02}$	9.21 $_{- 0.68}^{+ 0.18}$ $^{+0.18}_{-0.68}$
LTE (broad)	5.7 $_{- 0.33}^{+ 0.10}$ $^{+0.10}_{-0.33}$	40.48 $_{- 6.55}^{+ 0.40}$ $^{+0.40}_{-6.55}$	13.21 $_{- 0.11}^{+ 0.84}$ $^{+0.84}_{-0.11}$	0.84 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$	–	1.35 $_{- 0.02}^{+ 0.04}$ $^{+0.04}_{-0.02}$	41.44 $_{- 1.21}^{+ 0.95}$ $^{+0.95}_{-1.21}$

Notes. Uncertainties correspond to 3σ. Velocity uncertainties are of the order of the instrumental uncertainty (∼1.0 km s⁻¹). Column density (N(Sp)) values for A-type methanol can be obtained by dividing the E-type methanol values shown in the table by the ISO number given at the next-to-last column, while the rest of the parameters are the same for both methanol symmetric types. The dash symbol (–) indicates that no n_H₂ was derived as the model is in LTE. An LSR velocity of 7 ± 1.0 km s⁻¹ (see Sect. 2.3 and Fig. 1) was previously subtracted. Therefore, the real V_LSR value, of about 7.8 ± 1.0 km s⁻¹, depending on the component, is obtained by summing up these values.

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