||QSFit: a New Software for AGN Optical Spectral Analysis.
||521, Astronomical Data Analysis Software and Systems XXVI
||Calderone, G.; Nicastro, L.
||QSFit (Quasar Spectral Fitting) is a new software written in IDL to
perform optical spectral analysis of Type 1 Active Galactic Nuclei
(AGN) and to estimate several spectral quantities (such as continuum
luminosities and slopes, host galaxy contamination, luminosities,
widths and wavelength offsets of several emission lines, etc...). In
its first release (version 1.0) QSFit operates only on SDSS–DR10 FITS
files, and is designed to be executed non–interactively in order to
automatically apply the same analysis recipe on large AGN samples, and
generates catalogs of spectral quantities.
The QSFit code will be released as free software to allow researchers
to study in detail the current analysis recipe, and possibly improve
it. QSFit main purpose is to provide a framework to run standardized
analysis procedures on AGN spectra, to allow easy replication of the
data analysis, and sharing of the analysis recipes.
In this paper we will briefly illustrate the QSFit analysis procedure
and discuss the reliability of the AGN continuum slope estimates on a
sample of 71,251 SDSS optical spectra of Type 1 AGN at z<2. All
data in the QSFIT catalog, as well as all the plots of best fitting
model, residuals and composite plots are publicly available at the