Broad-band AGN SED model. Slight modification of AGNSED from Kubot & Done (2018), in that it now allows a colour-temperature correction on the standard outer disc region. This code was used in Hagen & Done (2023b, submitted) as a non-relativistic comparison to RELAGN. As it is based off (and very similar to) AGNSED, you should cite Kubota & Done (2018) (https://ui.adsabs.harvard.edu/abs/2018MNRAS.480.1247K/abstract). Feel free to also cite Hagen & Done (2023b, submitted).

• Working installation of HEASOFT (including XSPEC). This has been tested on Heasoft version 6.30, and 6.31, with XSPEC versions 12.12.1 and 12.13.0. If you do not already have Heasoft installed, it can be found here: https://heasarc.gsfc.nasa.gov/docs/software/heasoft/.

1. Clone the repository
2. Compile the code (two methods):
   • (Quick) Run the compile_to_xspec.sh shell script. This will pass the necessary compilation commands to Xspec such that you don't have to!
   • (Alterntive to 2.1): If you don't want to use the shell script then cd into the src/ directory, open Xspec and type: initpackage fagnsed lmod_fagnsed.dat . .
3. Load model to Xspec. Again cd into the src/ directory, open Xspec and type: lmod fagnsed .
4. (OPTIOANL): Make Xspec auto-load fagnsed upon startup. There are two methods for this:
   • (Quick): Run the init_xspec_autoload.sh shell script
   • (Alternative to 4.1): If you don't want to use the shell script you can instead cd into ~/.xspec open your xspec.rc file (if it does not exist, you can make one!) and give it the following line: lmod fagnsed /path/to/fAGNSED/src

Par 1.   $M$
    ▸ Units: $M_{\odot}$
    ▸ Description: Mass of the central Black Hole

Par 2.   $D$
    ▸ Units: Mpc
    ▸ Description: Co-Moving distance from the observer to the Black Hole

Par 3.   $\log \dot{m}$
    ▸ Units: $\log \dot{M}/\dot{M}_{\mathrm{Edd}}$
    ▸ Descripton: Log Mass-accretion rate, scaled by the Eddington mass accretion-rate. (i.e $\log \dot{m} = -1$ would imply $\dot{M} = 0.1 \dot{M}_{\mathrm{Edd}}$)

Par 4.   $a$
    ▸ Units: Dimensionless
    ▸ Description: Black hole spin parameter. 0 implies non-spinning, while 1 is maximally spinning (with prograde rotation). Note, the code will limit you to max 0.998 - This is the theoretical maximum assuming the presence of a disc

Par 5.   $\cos(i)$
    ▸ Units: Dimensionless
    ▸ Description: Cosine of the inclination of the observer with respect to the disc, as measured from the z-axis with the disc in the x-y plane

Par 6.   $kT_{e, h}$
    ▸ Units: keV
    ▸ Description: Electron temperature for the hot Comptonising corona. This sets the high-energy roll-over for the hot Comptonisation region

Par 7.   $kT_{e, w}$
    ▸ Units keV
    ▸ Description: Electron temperature for the warm Comptonising region.

Par 8.   $\Gamma_{h}$
    ▸ Units: Dimensionless
    ▸ Description: Spectral index for the hot Comptonisation component

Par 9.   $\Gamma_{w}$
    ▸ Units: Dimensionless
    ▸ Description: Spectral index for the warm Comptonisation component

Par 10.   $r_{h}$
    ▸ Units: $R_{G}$ ( $R_{G} = GM/c^{2}$ so technically dimensionless)
    ▸ Description: Outer radius of the hot Corona. If this is negative, then the code will set it to the innermost stable cirbular orbit, $r_{\mathrm{isco}}$

Par 11.   $r_{w}$
    ▸ Units: $R_{G}$
    ▸ Description: Outer radius of the warm Comptonisation region. If this is negative, then the code will set it to $r_{\mathrm{isco}}$

Par 12.   $\log r_{\mathrm{out}}$
    ▸ Units: $R_{G}$
    ▸ Description: Log of the outermost disc radius. If this is negative, then the code will use the self-gravity radius from Laor & Netzer (1989)

Par 13.   $f_{\mathrm{col}}$
    ▸ Units: Dimensionless
    ▸ Description: Colour-temperature correction to be applied to the standard *outer disc. If this is negative, then the code follows the relation in Done et al. (2012). Otherwise treated as a constant correction

Par 14.   $h_{\mathrm{max}}$
    ▸ Units: $R_{G}$
    ▸ Description: Maximum scale-height of the inner-corona

Par 15.   $z$
    ▸ Units: Dimensionless
    ▸ Description: Redshift of the source