Open Access

Table 1.

Targeted quasar pair.

ID SDSS name RA Dec zsystemic(a) zpeakLyα(b) i(c) M1450 Radio flux (d)
(J2000) (J2000) SDSS (this work) (mJy beam−1)
QSO1 SDSS J113502.03−022110.9 11:35:02.030 −02:21:10.93 3.020 ± 0.001 (3.019 ± 0.003) 3.011 21.84 ± 0.02 −23.44 <0.44
QSO2 SDSS J113502.50−022120.1 11:35:02.500 −02:21:20.14 3.008 ± 0.001 (3.008 ± 0.003) 3.003 22.15 ± 0.02 −23.12 <0.44



Quasar systemic redshift from the SDSS catalog and, in brackets, from the peak of the [C III] complex (i.e., [C III] is a doublet 1906.7, 1908.7 Å; and [Si III]λ1892 could be blended), after correcting for the expected shift (Shen et al. 2016). The intrinsic uncertainty on this correction is ∼233 km s−1 and dominates the error budget (Δz ≈ 0.003).


Redshift corresponding to the peak of the Lyα emission in the observed spectrum of each quasar.


i magnitude extracted from our data using the SDSS filter transmission curve and a circular aperture with a radius of 2″. The SDSS i magnitudes for the two quasars are iQSO1 = 21.50 ± 0.08 and iQSO2 = 22.05 ± 0.12.


3× rms at 1.4 GHz from the Very Large Array survey: Faint Images of the Radio Sky at Twenty-Centimeters (VLA FIRST; Becker et al. 1994).

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