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J/ApJ/599/116      UV properties of absorbed quasars        (Vestergaard+, 2003)

Occurrence and global properties of narrow C IV λ1549Å absorption lines in moderate-redshift quasars. Vestergaard M. <Astrophys. J., 599, 116-139 (2003)> =2003ApJ...599..116V
ADC_Keywords: QSOs ; Ultraviolet ; Equivalent widths ; Redshifts Keywords: galaxies: active - quasars: absorption lines - quasars: emission lines - ultraviolet: galaxies Abstract: A statistical study is presented of (1) the frequency of narrow C IV λ1549 absorption lines in 1.5≤z≲3.6 radio-quiet and radio-loud quasars and (2) the UV and radio properties of the absorbed quasars. The quasar sample is unbiased with respect to absorption properties, and the radio-quiet and radio-loud subsamples are well matched in redshift and luminosity. Description: The quasar sample under study comprises 66 RLQs and 48 RQQs located at redshifts between 1.5 and 3.5; it has already been studied by Vestergaard (2000PASP..112.1504V, 2004ApJ...601..676V), Vestergaard, Wilkes, & Barthel (2000ApJ...538L.103V), and Paper I (Vestergaard, 2002, ASP Conf. Ser. 255, 143). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 88 86 Properties of Absorbed Quasars and Their Absorbers table2.dat 88 53 Properties of Unabsorbed Quasars
Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Quasar name (QHHMM+DDd) 11- 13 A3 --- RType Radio type 15- 19 F5.3 --- z Quasar redshift 21- 26 F6.2 mag VMAG Absolute V magnitude (1) 28- 33 F6.3 [10-7W] logL1550 Monochromatic continuum luminosity at 1550Å 35- 39 F5.2 --- Sp+Index UV spectral slope, α_λ 41- 44 F4.2 --- E_Sp+Index Error on Sp+Index (Upper limit) 46- 49 F4.2 --- e_Sp+Index Error on Sp+Index (Lower limit) 51- 56 F6.1 0.1nm lambdaObs ? Wavelength position of the narrow absorber in the observed frame of reference (2) 58- 63 F6.4 --- zabs ? Redshift of the absorber (2) 65- 70 I6 km/s Vel ? Absorber velocity (2) (3) 72- 78 F7.4 --- beta ? Velocity/c (2) (3) 80- 83 F4.2 0.1nm EWabs ? Rest-frame equivalent width of the narrow absorber (2) 85- 88 F4.2 0.1nm e_EWabs ? rms uncertainty on EWabs (2) (4)
Note (1): α=-0.7 was adopted for the K-correction, Fλ∝λαλ Note (2): In table1.dat only. Note (3): The absorber velocity is defined as Vel=-β*c ; that is, negative velocities denote blueshifted absorbers relative to the emission-line redshift. Since UV broad emission lines can be blueshifted relative to the systemic redshift, redshifted absorption need not indicate infall toward the central engine. β=(r2-1)/(r2+1), where r=(1+zem)/(1+zabs), and c is the speed of light. Note (4): The 1σ EWabs uncertainty was measured from the continuum rms across a resolution element at the position of the absorber
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 05-Feb-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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