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The Multifrequency Catalog of liners (MCL) includes all objects from the various Liner samples known at the time of writing (1998), plus various objects compiled from the literature. It contains objects extracted from the main AGN catalogs: Lipovetsky, Neizvestny & Neizvetsnaya 1987 (LNN), Veron & Veron-Cetty, 6th & 7th editions, (VCV and VCV7), Huchra 1995 (HUC), as well as NASA extragalactic data base (NED), and lists that have appeared in various recent papers such as: Ho, Filippenko & Sargent (Ho93, Ho97), Kim et al. (K95), Veilleux et al. (VK95), and Wu et al. (Wu98). The MCL is presented in Tables 1 through 6, and was constructed following the style of the Catalog of the Second Byurakan Survey Seyfert Galaxies by LNN. We describe next the content of each Table.

Table 1 contains the list of Liners including: IAU name (column 1); alternative name (2); 1950 right ascension and declination (3 & 4); properties of host galaxy such as: redshift (5); B magnitude (whenever more than one determination was found, we chose the one for the large major axis) in 6; Ext (B) in 7; Hubble type (8); references to: Liner identification (9); redshift determination (10); and finaly references to B & Ext (B) in column 11. Tables 2 through 6 contain data at various frequencies and bands from radio to X-rays, and are described below.

Table 2 contains IRAS and radio data. In all Tables the IAU name is in column (1); data are ordered as follows: IRAS fluxes in Jys for 12, 25, 60, and 100 µm, respectively are in cols. (2) through (5); FIR flux in erg s-1 cm-2 in (6); fluxes at 6cm & 11cm in Jys are in (7) & (8); fluxes at 21cm (HI) in erg s-1 cm-2 in (9), and references to radio data are in (10). IRAS data comes from the IRAS Point Source Catalog and were taken from Kim et al. (1995), Ho, Filippenko & Sargent (1997), and NED.

Table 3 includes photometric properties of the underlying galaxy ordered as follows: dereddened V magnitude (2); dereddened optical colors (U - B), (B - V) & (V - R) in cols.(3) through (5); references to optical magnitudes and colors are in (6); infrared magnitudes & colors J, (J - H), (H - K) & L are in (7) through (10). All references to IR data are from NED and in a few cases from Duc, Mirabel & Maza (1997).

Table 4 contains optical spectroscopic data ordered as follows, dereddened line ratios: [OIII]5007/Hbeta, [OI]6003/Halpha, [NII]6583/Halpha and [SII]6716+6731/Halpha in cols. (2) through (5), and references (6). In (1) the following marks have been used: B for Liners with broad Halpha emission (Ho, Filippenko, Sargent & Peng 1997); HII & Sy for galaxies that we found to be probably misclassified on the basis of the diagnostic diagrams shown in figure 5 (this objects do not lie within the Liner region in all three diagrams simultaneously), and that are probably Starburst (HII) or Seyfert 2 galaxies, respectively or both. The listed ratios were dereddened using Miller & Mathews (1972) parameterization for the dereddening curve given by Whitford (1958).

Table 5 contains IR spectroscopic data ordered as follows: [FeII] 1.2567 µm (2); Pabeta 1.2818 µm (3); Paalpha 1.875 µm (4); Brdelta 1.945 µm (5); Brgammaa 2.1655 µm (6); H2 1.835 µm (7); H2+[Si VI] 1.958 & 1.962 µm (8); H2 2.033 and 2.1218 µm in (9) & (10) respectively, and references in (11).

Table 6 contains UV and X-ray data in the following order: short and long wavelength UV fluxes (2) & (3), from the SW (1150-2000 Å) and LW (1850-3300 Å) cameras on board of IUE. Data were obtained following the access guide to ULDA (Ultraviolet Low-Dispersion Archive) No. 4, and also from NED. The entries are in units of 1014 ergs cm-2 s-1 Å-1. X-ray fluxes are in 10-13 ergs cm-2 s-1 (4) with references in (5).

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