The fast transient AT 2023clx in the nearby LINER galaxy NGC 3799 as a tidal disruption of a very low-mass star

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Table 1.

Spectroscopic observations of AT 2023clx.

UT date	MJD	Phase ^(a)	Telescope+Instrument	Grism/Grating	Slit width	Airmass	Exposure time	Position angle
(yyyy-mm-dd)		(days)			(arcsec)		(s)	(deg)
2023-02-26	60001.58	4.3	SEIMEI+KOOLS-IFU ^(b)	VPH-blue	–	–	3600	–
2023-02-27	60002.29	5.0	NTT+EFOSC2	GR#11	1.0	1.45	1500	−105.4
2023-03-04	60007.02	9.8	NOT+ALFOSC	GR#18, GR#8	1.0	1.07	1800, 1800	−56.6
2023-03-04	60007.13	9.9	VLT+XSHOOTER	UVB,VIS, NIR	1.0, 1.0, 0.9	1.63	960, 1088, 600	136.6
2023-03-11	60014.98	17.7	NOT+ALFOSC	GR#18, GR#8	1.0	1.12	2400, 2400	−60.2, −51.6
2023-03-15	60018.16	20.9	VLT+XSHOOTER	UVB, VIS, NIR	1.0, 1.0, 0.9	1.35	1200, 1326, 500	154.4
2023-03-20	60023.50	26.2	Keck+LRIS ^(b)	–	–	–	300	–
2023-03-22	60025.98	28.7	NOT+ALFOSC	GR#18	1.0	1.08	2400	−50.3
2023-03-26	60029.11	31.9	VLT+XSHOOTER	UVB, VIS, NIR	1.0, 1.0, 0.9	1.42	1668, 1800, 600	148.4
2023-03-28	60031.99	34.7	NOT+ALFOSC	GR#18, GR#8	1.0	1.07	2400, 2400	−35.4, 51.2
2023-04-06	60040.09	42.8	VLT+XSHOOTER	UVB, VIS, NIR	1.0, 1.0, 0.9	1.38	1974, 2100, 960	148.4
2023-04-13	60047.98	50.7	NOT+ALFOSC	GR#18, GR#8	1.0	1.04	2400, 2400	41.2, 7.7
2023-04-18	60052.20	54.9	NTT+EFOSC2	GR#13	1.0	1.72	3600	−120.5
2023-04-24	60058.06	60.8	NOT+ALFOSC	GR#18, GR#8	1.0	1.37	3000, 3000	61.7
2023-05-06	60070.98	73.7	NOT+ALFOSC	GR#18	1.0	1.10	3600	46.8
2023-05-14	60078.01	80.8	NOT+ALFOSC	GR#8	1.0	1.29	3600	61.2
2023-05-20	60085.00	87.7	NTT+EFOSC2	GR#13	1.0	1.42	5400	−77.9
2023-06-02	60097.94	100.7	NOT+ALFOSC	GR#18, GR#8	1.0	1.31	3600, 3600	59.5
2023-06-21	60116.90	119.6	NOT+ALFOSC	GR#18	1.0	1.3	3600	61.3
2023-06-28	60122.99	125.7	VLT+XSHOOTER	UVB, VIS, NIR	1.0, 1.0, 0.9	1.48	440, 400, 300	−149.6

Notes.

^(a)

With respect to the date of g-band maximum (MJD = 59997.2) and given in the rest frame of AT 2023clx (z = 0.01107).

^(b)

These spectra were retrieved from TNS hence we do not have information on the slit width, airmass and position angle.

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