The AGN Atlas
This atlas contains a few spectral templates of AGNs covering the
ultraviolet to near-infrared spectral range (see Table 1 for spectral
coverage). The LINER and Seyfert 2 templates have been obtained with the
large aperture (10" by 20") and low resolution spectrographs of the IUE
satellite. The optical spectra were obtained through a long slit with a 10"
width, were a window of 20" long was extracted to mach the IUE aperture
(Calzetti 1995, private comm.). The flux of the LINER and Seyfert2 templates
is normalized to a Johnson visual magnitude of 12.5 (STMAG).
The Seyfert1 template consists of an UV spectrum obtained with the IUE low
resolution spectrographs and of a ground-based optical spectrum. The bright
QSO template is a composite spectrum from the Large Bright Quasar Survey
of Francie and collaborators (1991). The Seyfert1 and QSO spectral
templates are normalized to a Johnson blue magnitude of 12.5 (STMAG).
The NGC 1068 template is a composite spectrum. The continuum contains the
nebular, stellar, and power-law contributions. The observed fluxes and FWHM
of the UV, optical and near-IR emission lines are also incorporated into the
template (J.R. Walsh, private comm; read also the header of the STSDAS binary
for further details).
Details about how each template has been constructed can be found in the header
of the STSDAS binary file, or in the references given above. The header can be
read using the tupar task of the IRAF ttools package. STSDAS files can also be
dumped into an ASCII formatted file using the tdump task of the IRAF ttools package.
Table: List of Templates in the AGN Atlas
File Name Spectral coverage Comments
(angstroms)
liner_template 1235 - 7550 spectrum of M81
seyfert2_template 1235 - 9945 average of various spectra
seyfert1_template 1132 - 7078 spectrum of NGC 5548
qso_template 800 - 6000 average of various spectra
ngc1068_template 1000 - 11000 model: lines + cont.
References
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Francis et al. 1991, ApJ 373, 465.
To the AGN Atlas
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