Last modified: December 2018

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

xsspline

Context: models

Synopsis

The XSPEC spline model: spline modification.

Syntax

xsspline

The xsspline model is a multiplivative model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.Estart   thawed          0.1            0          100        keV
   mdl.Ystart   thawed            1       -1e+06        1e+06           
   mdl.Yend     thawed            1       -1e+06        1e+06           
   mdl.YPstart  thawed            0       -1e+06        1e+06           
   mdl.YPend    thawed            0       -1e+06        1e+06           
   mdl.Eend     thawed           15            0          100        keV

ATTRIBUTES

The attributes for this object are:

Estart

The start x value (energy), in keV.

YStart

The start y value.

Yend

The end y value.

YPstart

The start dy/dx value.

YPEnd

The end dy/dx value.

Eend

The end x value (energy), in keV.

References

XSPEC version

CIAO 4.11 comes with support for version 12.10.0e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.0e

Bugs

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