The flat-spectrum radio quasar 3C 345 from the high to the low emission state

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Table 1

Observational details for optical spectra.

Date	Telescope	Dispersion	Slit (arcsec)	R	Lamp	Exposure time (s)
2009-08-20	NOT	grism#6	1.3	530	HeNe	700
2010-06-30	NOT	grism#4	1.0	400	HeNe	900
2011-05-29	NOT	grism#4	1.0	400	HeNe	500
2013-07-16	INT	grating#7	1.0	400	CuArNe	1800
2016-05-26	NOT	grism#20	0.5	1850	ThAr	1800
2016-05-30	TNG	LR-B	0.7	750	HgNe	1800
2016-08-28	T122	300 mm⁻¹	4	700	FeAr	14 400

Notes.Columns: (1) Date; (2) telescope used for observations; (3) dispersion element; (4) slit; (5) spectral resolution R; (6) lamp for wavelength calibration; (7) exposure time.

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