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Q 1317+274
V = 16.0; z = 1.014; exp = 3600 s; coverage = 3810.5-6304.9 A
A very high signal to noise spectrum of this QSO has been studied by SS92. They report two Mg II system, at z = 0.2887 and 0.6596. The observed wavelengths of the former were not covered by the HIRES format. Based upon FOS/HST spectra, the latter absorber was reported to have Lyman limit absorption with log N(HI) = 17.76 cm^-2 (Bahcall et al. 1993).
z=0.660051 |DATA & VOIGT PROFILES| |EWs & AOD COLUMNS| |VP PARAMETERS|
SS92 reported weak, but definite, Mg II and Fe II. The HIRES spectrum has revealed that this system is spread over ~150 km/s with a main subsystem that has a full width of ~50 km/s and an asymmetric profile. Three subsystems were found and a total of eight VP components were fit. The higher velocity subsystems are optically thin and are suggestive of "cloud" blends or differential streaming motion along the line of sight. Fe II has been detected in the main and next strongest subsystems only. These subsystems have each been fit with three VP components. The Mg I transition has been detected aligned with the highest N_a(v) portion of the main subsystem only. 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 3.39.
Post Thesis WorkFOS/HST data have been investigated.
See Churchill et al. (2000a)
See Churchill et al. (2000b)
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