Ahelp: models - CIAO 3.4

Description

The following is the list of models available within Sherpa. The last column in the table indicates whether the model is integrated when fit to binned data; "ON" indicates that the model is integrated by default. See the documentation on the INTEGRATE command for further information about source model integration.

Summary of Sherpa Models:

<sherpa_modelname>	Description	Integration
ATTEN	Attenuation by ISM	OFF
{BBODY \| BB}	Blackbody as a function of energy	ON
BBODYFREQ	Blackbody as a function of frequency	ON
BETA1D	1-D surface brightness beta-model	OFF
{BETA2D \| LORPOW2D}	2-D Lorentzian with varying power law	OFF
BOX1D	1-D box function	OFF
BOX2D	2-D box function	OFF
BPL1D	Broken power law function	ON
{CONST1D \| CONST}	1-D constant amplitude model	ON
CONST2D	2-D constant amplitude model	ON
COS	Cosine function	OFF
DELTA1D	1-D delta function	ON
DELTA2D	2-D delta function	ON
DEVAUCOULEURS	DeVaucouleurs profile	OFF
DERED	Dereddening function	OFF
EDGE	Photoabsorption edge model	OFF
{FARF1D \| FARF}	A 1-D file-based ancillary response model	N/A
{FARF2D \| FEXPMAP \| FEXPMAP2D}	A 2-D file-based ancillary response model	N/A
FPSF1D	A 1-D file-based PSF instrument model	N/A
{FPSF2D \| FPSF \| PSFFROMFILE}	A 2-D file-based PSF instrument model	N/A
{FRMF1D \| FRMF}	A 1-D file-based response matrix model	N/A
{GAUSS1D \| GAUSS}	1-D unnormalized Gaussian function	ON
GAUSS2D	2-D unnormalized Gaussian function	OFF
GRIDMODEL	N-D user-specified amplitude model	OFF
{HIGHPASS \| STEPHI1D}	1-D step function	OFF
{HUBBLE \| REYNOLDS}	Hubble-Reynolds profile	OFF
JDPILEUP	John Davis (MIT) pileup model	OFF
{LORENTZ1D \| LORENTZ}	1-D normalized Lorentzian function	ON
LORENTZ2D	2-D unnormalized Lorentzian function	OFF
{LORPOW2D \| BETA2D}	2-D Lorentzian with varying power law	OFF
{LOWPASS \| STEPLO1D}	1-D step function	OFF
NBETA	1-D normalized beta function	ON
NGAUSS1D	1-D normalized Gaussian function	ON
POISSON	Poisson function	OFF
{POLYNOM1D \| POLY}	1-D polynomial function	ON
POLYNOM2D	2-D polynomial function	ON
{POW \| POWLAW \| POWLAW1D}	1-D power law	ON
PTSRC1D	A 1-D file-based point-source fitting model	OFF
{PTSRC2D \| PTSRC}	A 2-D file-based point-source fitting model	OFF
{REYNOLDS \| HUBBLE}	Hubble-Reynolds profiles	OFF
{RSP1D \| RSP}	A 1-D instrument model	N/A
RSP2D	A 2-D instrument model utilizing an exposure map and point-spread function	N/A
SCHECHTER	Schechter function	OFF
SHEXP10	Exponential function, base 10	OFF
SHEXP	Exponential function	OFF
SHLOG10	Logarithm function, base 10	OFF
{SHLOGE \| SHLOG}	Natural logarithm function	OFF
SIN	Sine function	OFF
SQRT	Square root function	OFF
{STEPHI1D \| HIGHPASS}	1-D step function	OFF
{STEPLO1D \| LOWPASS}	1-D step function	OFF
TAN	Tangent function	OFF
TPSF1D	A 1-D TCD-model-based PSF instrument model	N/A
{TPSF2D \| TPSF \| PSFFROMTCD \| PSF}	A 2-D TCD-model-based PSF instrument model	N/A
USERMODEL	User implemented model	OFF
XS<xspecname>	An XSPEC model function	N/A

See "ahelp xs" for a list of XSPEC models available within Sherpa.

Synopsis

Description

Summary of Sherpa Models:

Bugs

See Also