SWIRE Template Library
The SWIRE template library contains 25
templates including 3 ellipticals, 7 spirals, 6 starbursts, 7 AGNs (3
type 1 AGNs, 4 type 2 AGNs), and 2 composite (starburst+AGN) templates
covering the wavelength range between 1000 Angstrom and 1000 micron.
The elliptical, spiral and starburst templates, were generated with the
GRASIL code (Silva et al. 1998). The 7 spirals range from early to late
types (S0-Sdm), the starburst templates correspond to the SEDs of NGC
6090, NGC 6240, M 82, Arp 220, IRAS 22491-1808, and IRAS
20551-4250. In all of the spirals and starburst templates the
spectral region between 5 and 12 micron, where many broad emission and
absorption features are observed, was replaced using observed IR
spectra from the PHT-S spectrometer on the Infrared space Observatory
and from IRS on Spitzer.
Templates of moderately luminous AGN, representing Seyfert 1.8 and
Seyfert 2 galaxies, were obtained by combining models, broad-band
photometric data (NED), and ISO-PHT-S spectra (Schulz, private
communication) of a random sample of 28 Seyfert galaxies. The other six
AGN templates include three templates representing optically-selected
QSOs with different values of infrared/optical flux ratios (QSO1,
TQSO1, and BQSO1) and two type 2 QSOs (QSO2 and Torus). The QSO1
templates are derived by combining the SDSS quasar composite spectrum
and rest-frame infrared data of a sample of 35 SDSS/SWIRE type 1 QSOs
(Hatziminaoglou et al. 2005). After normalizing each SED in the
optical, we derived three templates with the same optical spectrum but
three different IR SEDs. The QSO1 IR template was obtained from the
average fluxes of all the measurements regrouped in wavelength bins,
the TQSO1 IR template was obtained from the highest 25% measurements
per bin, and the BQSO1 IR template was obtained from the lowest 25%
measurements per bin. The type 2 QSO template (QSO2) was obtained by
combining the observed optical/near-IR spectrum of the red quasar FIRST
J013435.7-093102 (Gregg et al. 2002) and the rest-frame IR data from
the quasars in the Palomar-Green sample with consistent optical SEDs.
The other type 2 QSO template (Torus) corresponds to the model used to
fit the SED of a heavily obscured type 2 QSO, SWIRE_J104409.95+585224.8
(Polletta et al. 2006).
The composite (AGN+SB) templates are empirical templates created to fit
the SEDs of the following objects: the heavily obscured BAL QSO Mrk 231
(Berta 2005, Ph.D. Thesis), the Seyfert 2 galaxy IRAS 19254-7245 South
(Berta et al. 2003). These objects contain a powerful starburst
component, mainly responsible for their large infrared luminosities and
an AGN component that contributes to the mid-IR luminosities.
The SWIRE template library has been used in the following works:
Polletta et al. 2007, Tajer et al. A&A, Siana et al.
2007, Polletta et al. 2006, Weedman et al. 2006, Davoodi et al.
2006a, 2006b, Hatziminaoglou et al. 2005, Jarrett et al. 2004,
Franceschini et al. 2005, Lonsdale et al. 2004.
For each template a file with 2 columns is given (1st col.: wavelength
in Angstrom, 2nd col: normalized at 5500 Angstrom Flambda in
erg cm-2 s-1 A-1). The wavelength range
and number of points are not fixed.
Berta, S. 2005, Ph.D. Thesis, Padua University, Italy
Berta, S. et al. 2003, A&A, 403, 119
Brotherton M.S. et al. 2001, ApJ, 546, 775
Davoodi, P. et al. 2006a, MNRAS, 371, 1113
Davoodi, P. et al. 2006b, AJ, 132, 1818
Franceschini, A. et al. 1005, AJ, 129, 2074
Gregg, M.D. et al. 2002, ApJ, 564, 133
Hatziminaoglou E. et al. 2005, AJ, 129, 119
Jarrett, T.H., Polletta, M. et al. 2006, AJ, 131, 261
Lonsdale, C., Polletta, M. et al. 2004, ApJS, 154, 54
Polletta, M. et al. 2006, ApJ, 642, 673
Polletta, M. et al. 2007, ApJ, 663, 81
Siana, B., Polletta, M. et al. 2008, ApJ, 675, 49
Silva, L. et al. 1998, ApJ, 509, 103
Tajer, M., Polletta, M. et al. A&A, 467, 73
Weedman, D., Polletta, M. et al. 2006, 653, 101