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Q 0450-132
V = 17.5; z = 2.253; exp = 5400 s; coverage = 3986.5-6424.5 A
This QSO was discover by C. Hazard (position unpublished, private communication) and has been previously studied by SBS and SS92. Two systems were studied here. A third and a fourth system at z = 1.2291 and z = 1.3108, first identified by SS92, have also been observed in the HIRES spectrum. However, they have not been included in overall statistics of this study due to oversight.
z=0.493937 |DATA & VOIGT PROFILES| |EWs & AOD COLUMNS| |VP PARAMETERS|
This system was first reported by SBS. A single kinematic region was found with a smoothly varying asymmetry in the blue wing. Formally, only two VP components were fit to the overall profiles, but there may be at least two more that could not be distinguished because of the low signal to noise in the spectrum at these wavelengths. In both the Mg I and the Ca II 3934 transitions, there appears to be a double component where a single VP component has been fit. Furthermore, there is a small apparent feature in both transitions of the Mg II doublet at ~+60 km/s, which was not formally detected by ewregion. None of the five Fe II transitions listed in Table 3.16 nor the Mn II triplet was covered by the HIRES format. A higher signal to noise spectrum of this system may reveal up to as many as five VP components, and possibly more if detailed structure in Fe II transitions is found.
z=1.174615 |DATA & VOIGT PROFILES| |EWs & AOD COLUMNS| |VP PARAMETERS|This system was first reported by SBS based upon the Fe II lines, and was later confirmed with Mg II by SS92. The absorption profiles exhibit the "double system" morphology characteristic of strong higher redshift absorbers. The Mg II 2803 was only partially observed because it was cut off at the edge of the CCD. The Ca II 3934, 3969 doublet, the Mg I 2853 transition, and the Fe II 2586 transitions were not covered by the HIRES format. The Mn II triplet showed strong absorption. As such, this was considered to be a damped Ly-alpha system by Lu et al. (1996), who have presented an independent analysis. The measured properties are presented in Table 3.17.
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