Time variations of narrow absorption lines in high resolution quasar spectra

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Volume 581 (September 2015)

A&A, 581 (2015) A109

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Table 1

The sample.

Target	Class	Coordinates	z _em	Spectrograph	Date	λ range	Δt,n
common name		J2000				nm	min

AO 0235+164^a	BL-γ	023838.9+163659	0.937	HIRES	12-1997	367–612	40, 4
				UVES	02-2007	303–388+58-668	60, 4

PKS 0458−020	FS-γ	050112.8−015914	2.286	HIRES	02-1995	394–629	480^b
				UVES	10-2004	390–665+670-850	75, 4

PKS 1229−02	FS-γ	123200.0−022404	1.044	UVES	02-2002	326–445+458–668	60, 3
				UVES	04-2011	326–445+458-668	50, 1

PKS 1741−038	FS-γ	174358.8−035004	1.054	UVES	06-2001	414–621	40, 2
				UVES	04-2011	414–621	50, 5

FBQS J2340−0053	FS	234023.7−005327	2.085	HIRES	08-2006	306–589	250^b
				UVES	10-2008	330–450+478–681	75, 6

Notes. Class – BL: BL Lac object, FS: Flat Spectrum Radio QSO (FSRQ), γ: Gamma-ray emitter. The four γ-ray emitters are blazars. Spectrograph – spectral resolution: FWHM(HIRES) = 6.25 km s^-1, FWHM(UVES) = 6.6 km s^-1. Δt,n Exposure time per individual exposure and number of exposures.

^(a)

In a very high state at both epochs. The new z_em is derived from [Ne iv] emission.

^(b)

Total exposure time.

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