The transient event in NGC 1566 from 2017 to 2019 - I. An eccentric accretion disk and a turbulent, disk-dominated broad-line region unveiled by double-peaked Ca II and O I lines

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Table 1.

Log of spectroscopic observations of NGC 1566 before, during and after the transient event in 2018.

ID	Mod. JD	UT date	Exp. time	Seeing	Instr.
			[s]	FWHM
1	57289.23	2015-09-24	2080	$2 \overset{″}{.} 25$ $2{{\overset{\prime\prime}{.}}}25$	MUSE ^(a)
2	58049.20	2017-10-23	3600	$0 \overset{″}{.} 89$ $0{{\overset{\prime\prime}{.}}}89$	MUSE ^(b)
3	58319.17	2018-07-20	600	$1 \overset{″}{.} 6$ $1{{\overset{\prime\prime}{.}}}6$	RSS
4	58329.16	2018-07-30	100	–	RSS
5	58395.96	2018-10-04	600	$1 \overset{″}{.} 9$ $1{{\overset{\prime\prime}{.}}}9$	RSS
6	58735.03	2019-09-09	600	$1 \overset{″}{.} 5$ $1{{\overset{\prime\prime}{.}}}5$	RSS

Notes.

^(a)

Obtained in no-AO wide field mode.

^(b)

Obtained in AO wide field mode.

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