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Aims: We present a near-infrared spectral atlas of 47 active galactic nuclei(AGN), of all degrees of activity, in the wavelength interval of 0.8-2.4microns, including the fluxes of the observed emission lines. We analyze thespectroscopic properties of the continuum and emission line spectra of thesources Methods: In order to exclude aperture and seeing effects we usenear-infrared spectroscopy in the short cross-dispersed mode (SXD, 0.8-2.4microns), taking the JHK-bands spectra simultaneously. Results: We present themost extensive NIR spectral atlas of AGN to date. This atlas offers a suitabledatabase for studying the continuum and line emission properties of theseobjects in a region full of interesting features. The shape of the continuum ofQSOs and Seyfert 1's are similar, being essentially flat in H and K band, inthe J band, a strong variation is found. In Seyfert 2 galaxies, the continuumin the F_lambda X lambda space smoothly decreases from 1.2 microns redwards inalmost all sources. In J, it smoothly rises bluewards in some sources while inothers a small decreased in flux is observed. The spectra are dominated bystrong emission features of H I, He I, He II, [S III] and conspicuous forbiddenlines of low and high ionization species. Molecular lines of H2 are commonfeatures to most objects. The absence of O I and Fe II lines in Seyfert 2galaxies give observational support to the fact that these lines are formatedin the outermost portion of the broad line region. [P II] and coronal lines aredetected in all degrees of activity. The [Fe II] 12570A/16436A line ratiobecomes a reliable reddening indicator for the narrow-line region of Seyfertgalaxies.Comment: 39 pages, 17 figures, accepted for publication in Astronomy and  Astrophysics (15/05/2006

A 0.8–2.4μm spectral atlas of active galactic nuclei