## Help page for the online calculators

#### Band

Energy band in which the AGN counts are computed.#### S min, max

Flux interval in the chosen energy band over which the AGN counts are computed.#### E min, max

Energy bounds of the output CXB spectrum, in keV. Valid entries are between 0.1 and 1000 keV.#### log N_{H} min, max

Absorption range (logarithms of the column density N_{H}/cm

^{-2}are used). Valid entries are between 20 and 26, in steps of 1 (i.e. 20, 21, 22, 23, 24, 25, 26). A few examples showing how to get the contribution from different AGN classes are listed below:

class log N_{H}min log N_{H}max

Unabsorbed 20 21

Absorbed Compton thin 21 24

Absorbed Compton thick 24 26

Mildly Compton thick 24 25

Heavily Compton thick 25 26

#### redshift min, max

Redshift interval. Valid entries for z_min and z_max are between 0 and 10. Results for very narrow intervals (z_max - z_min < 0.05) may be inaccurate.#### high-z decline

Two options are available for the evolution of AGN at high redshift. In the first option ( ), the XLF evolves as parameterized by Eqs. 8,9 and 10 of Hasinger, Miyaji & Schmidt (2005, A&A, 441, 417; HMS05). This produces a mild decline of the AGN number density as a function of redshift as shown in Fig. 5a of HMS05. In the second option ( ), the XLF described above is multiplied by a steeper decline term at redshifts above 2.7 parameterized following Schmidt, Schneider & Gunn (1995, AJ, 110, 68): XLF_YES = XLF_NO * exp(2.7-z).#### log L min, max

Logarithmic luminosity interval. Input values must be 0.5-2 keV rest frame, de-absorbed luminosities in units of erg/s. Entries can be extended even beyond the range logL=42-48 used by Gilli, Comastri, Hasinger (2007, A&A, 463, 79)Contacts: roberto.gilli

Last modified: 14 May 2020