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Seyfert 1 Composite Spectrum using SDSS Legacy Survey Data
     Nihan Pol, Yogesh Wadadekar
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Abstract:
   	We present a rest-frame composite spectrum for Seyfert 1 galaxies using spectra
	obtained from the DR12 release of the Sloan Digital Sky Survey (SDSS). The spectrum
	is constructed by combining data from a total of 10,112 galaxies, spanning a redshift
	range of 0 to 0.793. We produce an electronic table of the median and geometric mean
	composite Seyfert 1 spectrum. We measure the spectral index of the composite spec-
	trum, and compare it with that of the composite quasar spectrum. We also measure
	the flux and width of the strong emission lines present in the composite spectrum.
	We compare the entire spectrum with the quasar spectrum in the context of the AGN
	unification model. The two composite spectra match extremely well in the blue part
	of the spectrum, while there is an offset in flux in the red portion of the spectrum.


File Summary:

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 FileName    				Explanations
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ReadMe					This file
median_table.txt			Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum
GM_table.txt				Lists wavelength, flux, error in flux for geometric mean composite Seyfert 1 spectrum
ratio.txt				Lists wavelength and flux for the ratio spectrum shown in Fig. 13
median_spectrum_0<z<0.1.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.0 < z < 0.1
median_spectrum_0.1<z<0.2.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.1 < z < 0.2
median_spectrum_0.2<z<0.3.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.2 < z < 0.3
median_spectrum_0.3<z<0.4.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.3 < z < 0.4
median_spectrum_0.4<z<0.5.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.4 < z < 0.5
median_spectrum_0.5<z<0.6.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.5 < z < 0.6
median_spectrum_0.6<z<0.7.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.6 < z < 0.7
median_spectrum_0.7<z<0.8.txt		Lists wavelength, flux, error in flux for median composite Seyfert 1 spectrum created with objects in redshift range 0.7 < z < 0.8
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Authors' address:
 
Nihan Pol		nspol@mix.wvu.edu
Yogesh Wadadekar	yogesh@ncra.tifr.res.in