Table A.1.
Redshift measurements of PKS 0529-549 based on the strongest emission lines detected in the X-shooter spectrum.
Feature | λrest, air | λobs, air | Redshift | Comments |
---|---|---|---|---|
(Å) | (Å) | |||
Lyα | 1215.67 | 4343.02 ± 0.05 | 2.5725 ± 0.0004 | Fitted simultaneously with a narrow absorption component |
N V | 1238.82 | 4427.42 ± 0.17 | 2.5739 ± 0.0004 | Affected by blueshifted absorption |
N V | 1242.80 | 4441.34 ± 0.21 | 2.5736 ± 0.0004 | —"— |
Si IV | 1393.76 | 4994.13 ± 0.43 | 2.5832 ± 0.0004 | —"— |
Si IV | 1402.77 | 5018.79 ± 0.70 | 2.5778 ± 0.0005 | —"— |
C IV | 1548.20 | 5532.30 ± 0.10 | 2.5734 ± 0.0004 | —"— |
C IV | 1550.78 | 5544.26 ± 0.10 | 2.5752 ± 0.0004 | —"— |
He II† | 1640.42 | 5860.46 ±0.14 | 2.5725 ± 0.0003 | Asymmetric; Fig. 5 |
[Si III] | 1882.47 | 6724.81 ± 0.26 | 2.5723 ± 0.0003 | Possible blend of 4 Si III] lines |
[Si III] | 1892.03 | 6760.34 ± 0.45 | 2.5731 ± 0.0003 | |
[C III] | 1906.68 | 6811.70 ± 15.19 | 2.5725 ± 0.0057 | [C III] doublet blended; Skyline |
C III] | 1908.73 | 6818.442 ± 5.66 | 2.5722 ± 0.0021 | —"— |
C II] | 2325.40 | 8309.612 ± 0.36 | 2.5734 ± 0.0003 | Possible blend of 4 C II] and [O III] lines; Skylines |
[O II] | 3726.03 | 13 314.33 ± 0.64 | 2.5733 ± 0.0003 | [O II] doublet blended; Skyline |
[O II] | 3728.82 | 13 323.71 ± 0.96 | 2.5732 ± 0.0003 | —"— |
Hβ | 4861.33 | 17 369.18 ± 0.96 | 2.5729 ± 0.0003 | Skylines |
[O III] | 4958.91 | 17 718.74 ± 0.96 | 2.5731 ± 0.0003 | Skylines |
[O III] | 5006.84 | 17 889.57 ± 0.47 | 2.5730 ± 0.0003 | Skylines |
Notes.† indicates the feature used to define the systemic redshift. Listed wavelengths are as measured in air, along with the measurement errors resulting from the line-fitting. The redshift uncertainties include the listed measurement errors of the observed wavelengths, as well as systematic errors due to the wavelength calibration, spectral resolution and uncertainties in the theoretical rest-frame wavelengths. We note possible anomalies in the redshift measurements from these lines, including known and possible line blending, presence of absorption, and obscuration by bright sky emission lines. The large redshift uncertainties of the C III] and [C III] doublet redshifts are due to blending: determining the doublet line ratio requires knowledge of the electron density (Ferland 1981; Keenan et al. 1992). The O III]λλ1661,1666 are on top of skylines and redshift measurements are not possible.
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