Cosmic X-ray Background

Cosmic X-ray Background calculator

This tool computes the integrated spectrum of different AGN populations and hence their contribution to the cosmic X-ray background. The output energy range of the integrated spectrum, as well as the absorption, redshift, luminosity range of the input AGN can be specified in the form below.
The output spectrum is returned in ASCII format in units of E [keV] vs. ExF(E) [keV/s/sr/cm²].

A concordance cosmology withflat Universe with Ω_m=0.3, Ω_Λ=0.7, H₀=70 km/s/Mpc is assumed.

Please fill ALL fields to make the tool work properly. Click on the parameter names for help and valid parameter ranges.  


E min        :       (lower energy bound, in keV)
 
E max        :       (upper energy bound, in keV)
 
log NH min   :        (log minimum column density in cm^-2)

log NH max   :        (log maximum column density in cm^-2)

redshift min :       (minimum redshift)
 
redshift max :       (maximum redshift)
 
high-z decline :     (apply a decline to the high-z AGN XLF)

log L min    :       (log minimum luminosity, 0.5-2 keV, in erg/s)

log L max    :       (log maximum luminosity, 0.5-2 keV, in erg/s)
 

Press this button to continue:     (Queries may take from seconds to minutes depending on the adopted cuts.)
To reset the form press this button:

Please refer to Gilli, Comastri, Hasinger (2007, A&A, 463, 79) for a full description of the CXB synthesis model used in this calculator.

Contacts: roberto.gilli

Last modified: 14 May 2020