J/ApJ/708/868 CIV candidates (Cooksey+, 2010) ================================================================================ The last eight-billion years of intergalactic C IV evolution. Cooksey K.L., Thom C., Prochaska J.X., Chen H.-W. =2010ApJ...708..868C ================================================================================ ADC_Keywords: Active gal. nuclei ; QSOs ; Spectra, ultraviolet ; Redshifts ; Equivalent widths ; Spectroscopy Keywords: intergalactic medium - quasars: absorption lines - techniques: spectroscopic Abstract: We surveyed the Hubble Space Telescope UV spectra of 49 low-redshift quasars for z<1 CIV candidates, relying solely on the characteristic wavelength separation of the doublet. After consideration of the defining traits of CIV doublets (e.g., consistent line profiles, other associated transitions, etc.), we defined a sample of 38 definite (group G=1) and five likely (G=2) doublets with rest equivalent widths W_r_ for both lines detected at >=3{sigma}_W_r__. We conducted Monte Carlo completeness tests to measure the unblocked redshift ({Delta}z) and co-moving path length ({Delta}X) over which we were sensitive to CIV doublets of a range of equivalent widths and column densities. Using the power-law model of f(N(C^+3^)), we measured the C^+3^ mass density relative to the critical density: {Omega}_C^+3^_=(6.20^+1.82^_-1.52_)x10^-8^ for 13<=logN(C^+3^)<=15. Description: To assemble our target list, we searched the HST Space Telescope Imaging Spectrograph (STIS) and Goddard High-Resolution Spectrograph (GHRS) spectroscopic archives for objects with target descriptions including the terms, e.g., QSO, quasar, Seyfert, etc. Our final list included 69 objects with redshifts 0.001=3{sigma}(W_r,1548_) 128 = W_r,1550_>=3{sigma}(W_r,1550_) 64 = 1-{sigma}(R_W_)<=R_W_<=2+{sigma}(R_W_) 32 = |{delta}{nu}_CIV_|<=10km/s 16 = Candidate Ly{alpha} with W_r,1215_>=3{sigma}(W_r,1215_) 8 = CIV 1548 outside Ly{alpha} forest 4 = CIV 1548 outside H_2_ forest 2 = >=68.3% AOD profile per element (pixel) in 1{sigma} agreement 1 = Other candidate absorption lines with W_r_>=3{sigma}_W_r_ The flags are binary and sum uniquely. See section 3.2 for further details. -------------------------------------------------------------------------------- Global notes: Note (G1): HE0226-4410 is assumed to be a misprint for HE 0226-4110; corrected at CDS. -------------------------------------------------------------------------------- History: * 15-Feb-2012: from electronic version of the journal + List of targets positions from http://www.ucolick.org/~xavier/HSTCIV ================================================================================ (End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 15-Feb-2012