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Q 2145+064
V = 16.3; z = 0.999; exp = 4500 s; coverage = 3766.2-5791.3
Optical spectra of this QSO have been studied by Wills et al. (1980), SSB, Petitjean & Bergeron (1990), and SS92. Measurements of higher ionization species and of Ly-alpha absorption from a FOS/HST UV spectrum have been reported by Bergeron et al. (1994).
z=0.790777 |DATA & VOIGT PROFILES| |EWs & AOD COLUMNS| |VP PARAMETERS|
This system was first reported by Wills et al., and was later verified by SSB. Petitjean & Bergeron observed the Mg II at a resolution of 0.55 A (three times that of SSB) and found the profiles were a blend of at least three components. In the HIRES spectrum, each of these three components have been resolved and two of them are clearly seen to be blends. Thus, the profile has been divided into three subsystems, which were fit by one, three, and two VP components, respectively. These subsystems are each separated by ~90 km/s. It is possible that they do not arise under the same chemical or ionization conditions (e.g. Bergeron et al. 1994). The Fe II 2587 transition was not included in the analysis because it was positioned near the pen mark on the HIRES Tektronics CCD. The Ca II 3934, 3969 doublet was not covered by the HIRES format. The Mn II triplet showed no absorption to the EW(rest) limits given in Table 3.54.
Post Thesis WorkFOS/HST data have been investigated.
See Churchill et al. (2000a)
See Churchill et al. (2000b)
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