Last modified: December 2020

URL: https://cxc.cfa.harvard.edu/sherpa/ahelp/xskerrconv.html
AHELP for CIAO 4.13 Sherpa v1

xskerrconv

Context: models

Synopsis

The XSPEC kerrconv convolution model: accretion disk line shape with BH spin as free parameter

Syntax

xskerrconv

The xskerrconv model is a convolution model component.

Description

The model is described at [1] .


Example

>>> create_model_component("xskerrconv", "mdl")
>>> print(mdl)

Create a component of the xskerrconv model and display its default parameters. The output is:

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Index    frozen            3          -10           10           
   mdl.Index1   frozen            3          -10           10           
   mdl.r_br_g   frozen            6            1          400           
   mdl.a        thawed        0.998            0        0.998           
   mdl.Incl     thawed           30            0           90        deg
   mdl.Rin_ms   frozen            1            1          400           
   mdl.Rout_ms  frozen          400            1          400           

ATTRIBUTES

The attributes for this object are:

Attribute Definition
Index1 The emissivity index for the inner disk.
Index2 The emissivity index for the outer disk.
r_br_g The break radius separating the inner and outer portions of the disk, in gravitational radii.
a The dimensionless black hole spin.
Incl The disk inclination angle, in degrees. A face-on disk has Incl=0.
Rin_ms The inner radius of the disk, in units of the radius of marginal stability.
Rout_ms The outer radius of the disk, in units of the radius of marginal stability.

Notes

Unlike XSPEC, the convolution model is applied directly to the model, or models, rather than using the multiplication symbol.

References

Changes in CIAO

Added in CIAO 4.13

XSPEC version

CIAO 4.13 comes with support for version 12.10.1s of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.1s

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.

See Also

models
xskerrdisk