Identifying the mechanisms of water maser variability during the accretion burst in NGC6334I

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Volume 691 (November 2024)

A&A, 691 (2024) A157

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Table 1.

Summary of VERA observations, containing the dates of each observation, the phase tracking centre and the spectral resolution R_V.

Epoch	Observation date	Decimal date	Phase centre		R_V

			RA (J2000)	Dec (J2000)	(km s⁻¹)
1	19 Sep. 2014	2014.72	17^h13^m09 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 9415	−35°47′02 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 200	0.42
2	25 Nov. 2014	2014.90	17^h13^m09 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 9415	−35°47′02 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 200	0.42
3	31 Jan. 2015	2015.08	17^h20^m53 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 440	−35°47′02 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 200	0.42
4	14 Apr. 2015	2015.28	17^h20^m53 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 440	−35°47′02 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 200	0.40
5	17 Nov. 2015	2015.88	17^h20^m53 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 378	−35°46′55 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 847	0.42
6	09 Feb. 2016	2016.11	17^h20^m53 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 367	−35°46′56 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 930	0.42
7	12 Mar. 2016	2016.19	17^h20^m53 $\overset{s}{.}$ ${{\overset{\text{s}}{.}}}$ 367	−35°46′56 $\overset{″}{.}$ ${{\overset{\prime\prime}{.}}}$ 930	0.42

Notes. The onset of the accretion burst was 2015.0 and the 6.7 GHz methanol maser peak was 2015.6 (MacLeod et al. 2018).

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