Last modified: December 2018

URL: http://cxc.harvard.edu/sherpa/ahelp/linebroad.html
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AHELP for CIAO 4.11 Sherpa v1

linebroad

Context: models

Synopsis

A one-dimensional line-broadening profile.

Syntax

linebroad

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.ampl     thawed            1            0  3.40282e+38           
   mdl.rest     thawed         1000  1.17549e-38  3.40282e+38           
   mdl.vsini    thawed  1.17549e-38  1.17549e-38  3.40282e+38           

ATTRIBUTES

The attributes for this object are:

ampl

The amplitude of the line.

rest

The rest wavelength.

vsini

The rotation velocity (v sin(i)), in km/s.

Notes

The model is:

f(lambda) = 2 * ampl * c * sqrt(x) / (pi * rest * vsini)

        x = 1 - ((lambda - rest) * c / (rest * vsini))^2

Bugs

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