RKV: A catalogue of absorption-line systems in QSO's spectra

Authors: Ryabinkov A.I., Kaminker A.D., Varshalovich D.A.

Created on January 10 2003, and significantly updated on February 02 2006

New version of Table 1 (Quasars)!

(allows to search for sources within given redshift, coordinate and magnitude ranges)

New version of Table 2 (Absorption systems)!

(allows to search for absorption sistems within given redshift, wavelength and column concentration ranges)

The presented catalog contains a compilation of basic information on absorption-line systems (ALSs) in QSO spectra. The data are taken from publications available to the authors up to January 2003. The catalog consists of Introduction, Tables 1 and 2, and list of references, which (1th edition) are available also at the CDS via anonymous ftp to cdsarc.u-strasbg.fr ( or via cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/vol/page. Table 1 (Quasars) contains data on 872 QSOs whose characteristics of spectral observations are collected in Table 2 (Absorption systems). The data on QSOs are based on the catalog of M.-P. Veron-Cetty & P.Veron (2001) [A&A, 374, p.92] "A catalog of quasars and active nuclei (10th edition)" (site: vizier.hia.nrc.ca/cats/Usage.htx). Table 2 contains information on 20837 absorption lines detected in the spectra of 784 QSOs. These lines form 11298 absorption systems. The list of references contains all numerated literature sources indicated in Table 2.

In Table 1 (Quasars) the following information on a QSO occupies one line (from left to right):

    QSO's name
    a 2000
    d 2000
    z em
    a 1950
    d 1950
    QSO's name

    Table 2 (Absorption systems) contains the following information on spectral observations of the QSOs and on detected ALSs: the names of QSOs (J2000 and Q1950) whose spectral observations are presented in literature, parameters of spectral observations, and characteristics of absorption lines combined into the systems. The catalog includes absorption line systems consisting of lines of heavy-elements, lines of neutral hydrogen (HI), Lyman limit systems (LLS), damped Lya absorption systems (DLA), and broad absorption-line systems (BAL). In standard definitions LLSs are optically thick at the HI Lyman limit (912 A ) systems corresponding to HI column densities N(HI) > 2 x 10 17 cm -2 , DLA are systems corresponding to high HI column densities N(HI) > 2 x 10 20 cm -2 , BAL are systems characterized by wide absorption troughs produced by ions with outflow velocity extending from 0 up to 60,000 km/s relative to the QSO emission redshift. We rule out absorption systems consisting only of one heavy-element absorption line. On the other hand, the catalog includes the systems consisting only of one line of HI. We rule out also Galactic interstellar absorption lines.

    Observational data on each QSO are delimited in Table 2 by a pair of horizontal solid lines. First data below upper solid line contain two names of the QSO (J2000 and Q1950). The space between upper and lower solid lines contain a few sets of observational data. Each set begins (from top to bottom) by its own parameters of spectral observations delimited by two horizontal dash lines. They include (from left to right):

    l min - l max    A
    R = Dl obs    A
    z em

    Below the lower dash lines the next characteristics of absorption systems and lines are listed:

    for HI and heavy-elements

    z abs
    l lab
    l obs
    s ( l obs )
    W obs
    s ( Wobs )

    for LLS

    for DLA systems

    for BAL systems

    All reported wavelengths are vacuum.

    The space between two solid lines in Table 2 may contain a few sets of observational data on spectra of the QSOs registered in different observations and presented by different authors. Each set of observational data begins from its own parameters of spectral observations delimited by the pair of horizontal dash lines as described above.


    The authors are planning to replenish the catalog regularly. Any remarks and comments would be greatly appreciated.


    E-mail addresses for contacts:

    Ryabinkov A.I.: calisto@rbcmail.ru
    Kaminker A.D.: kam@astro.ioffe.ru
    Varshalovich D.A.: varsh@astro.ioffe.ru