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   XSPEC V12 Models

           Alphabetical Summary of Models

Model

Description

absori

Ionized absorber.

acisabs

Extra absorption due to contamination on the ACIS filters.

ascac

ASCA PSF mixing model.

apec, vapec, vvapec

APEC thermal plasma model.

atable

Additive table model.

bapec, bvapec, bvvapec

Velocity broadened APEC thermal plasma model.

bbody, zbbody

Blackbody spectrum, with redshift variant

bbodyrad

Blackbody spectrum with norm proportional to surface area.

bexrav

E-folded broken power-law reflected from neutral matter

bexriv

E-folded broken power-law reflected from ionized matter

bknpower

Broken powerlaw.

bkn2pow

Three-segment broken powerlaw.

bmc

Comptonization by relativistically moving matter.

bremss, vbremss, zbremss

Thermal bremsstrahlung, with redshift variant.

c6mekl, c6pmkl, c6vmkl, c6vpmkl

6th-order Chebyshev polynomial DEM using mekal and variants

cabs

Compton scattering (non-relativistic)

cemekl, cevmkl

Multi-temperature mekal.

cflow

Cooling flow model.

cflux

Calculate flux of other model components.

compbb

Comptonized blackbody spectrum after Nishimura et al. 1986.

compLS

Comptonization spectrum after Lamb and Sanford 1979.

compmag

Thermal and bulk Comptonization for cylindrical accretion onto the polar cap of a magnetized neutron star.

compPS

Comptonization spectrum after Poutanen and Svenson 1986.

compST

Comptonization spectrum after Sunyaev and Titarchuk 1980.

comptb

Thermal and bulk Comptonization of a seed blackbody-like spectrum.

compTT

Comptonization spectrum after Titarchuk 1994.

constant

Energy-independent multiplicative factor.

cpflux

Convolution model to calculate photon flux.

cplinear

Non-physical model for low count background spectra.

cutoffpl

Powerlaw with high energy exponential rolloff.

cyclabs

Cyclotron absorption line.

disk

Disk model.

diskbb

Multiple blackbody disk model.

diskir

Irradiated inner and outer disk.

diskline

Line emission from relativistic accretion disk.

diskm

Disk model with gas pressure viscosity.

disko

Modified blackbody disk model.

diskpbb

Accretion disk with power-law T(r).

diskpn

Accretion disk around a black hole.

dust

Dust scattering out of the beam.

edge, zedge

Absorption edge.

eplogpar

Log-parabolic blazar model with vFv normalization.

eqpair, eqtherm, compth

Paolo Coppi's hybrid hot plasma emission models.

equil, vequil

Equilibrium ionization collisional plasma model from Borkowski.

etable

Table model for exponential of -1 times the input.

expabs

Low-energy exponential rolloff.

expdec

Exponential decay

expfac

Exponential factor.

ezdiskbb

Multiple blackbody disk model with zero-torque inner boundary.

gabs

Gaussian absorption line.

gadem, vgadem

Plasma emission, multi-temperature with gaussian distribution of emission measure.

gaussian, zgauss

Simple gaussian line profile.

gnei, vgnei

Generalized single ionization NEI plasma model.

grad

GR accretion disk around a black hole.

grbm

Gamma-ray burst model.

gsmooth

Gaussian smoothing with an energy dependent sigma.

heilin

Voigt absorption profiles for He I series.

highecut, zhighect

High energy cutoff.

hrefl

Simple reflection model good up to 15 keV.

ireflect

Reflection from ionized material.

kdblur

Convolve with the Laor model shape.

kdblur2

Convolve with the Laor2 model shape.

kerrbb

Multi-temperature blackbody model for thin accretion disk around a Kerr black hole.

kerrconv

Accretion disk line shape with BH spin as a free parameter.

kerrd

Optically thick accretion disk around a Kerr black hole.

kerrdisk

Accretion disk line emission with BH spin as free parameter.

laor

Line from accretion disk around a black hole.

laor2

Line from accretion disk with broken power-law emissivity around a black hole.

logpar

Log-parabolic blazar model.

lorentz

Lorentzian line profile.

lsmooth

Lorentzian smoothing with an energy dependent sigma.

lyman

Voigt absorption profiles for H I or He II Lyman series.

meka, vmeka

Mewe-Gronenschild-Kaastra thermal plasma (1992).

mekal, vmekal

Mewe-Kaastra-Liedahl thermal plasma (1995).

mkcflow, vmcflow

Cooling flow model based on mekal.

mtable

Multiplicative table model.

nei, vnei

Simple nonequilibrium ionization plasma model.

notch

Notch line absorption.

npshock, vnpshock

Plane-parallel shock with ion and electron temperatures.

nsa

Neutron star with hydrogen atmosphere

nsagrav

Neutron star with hydrogen atmosphere for different g

nsatmos

Neutron star H atmosphere with e- conduction and self-irradiation.

nsmax

Neutron star magnetic atmosphere.

nteea

Pair plasma model.

nthcomp

Thermally comptonized continuum.

optxagn, optxagnf

Colour temperature corrected disc and energetically coupled Comptonisation model for AGN.

partcov

Convert absorption model into a partial covering absorption.

pwab

Power-law distribution of neutral absorbers.

pcfabs, zpcfabs

Partial covering fraction absorption.

pegpwlw

Powerlaw with pegged normalization.

pexmon

Neutral Compton reflection with self-consistent Fe and Ni lines.

pexrav

Exponentially cut-off power-law reflected from neutral matter.

pexriv

Exponentially cut-off power-law reflected from ionized matter.

phabs, vphabs, zphabs, zvphabs

Photo-electric absorption

pileup

CCD pile-up model for Chandra

plabs

Absorption model with power-law dependence on energy.

plcabs

Cut-off powerlaw observed through dense, cold matter.

posm

Positronium continuum.

powerlaw, zpowerlw

Simple photon power law.

projct

3-D to 2-D projection mixing model.

pshock, vpshock

Constant temperature, plane-parallel shock plasma model.

pwab

Power-law distribution of neutral absorbers.

raymond, vraymond

Raymond-Smith thermal plasma.

rdblur

Convolve with the diskline model shape.

recorn

Change correction norm for a spectrum (replaces old recornrm command).

redden

IR/optical/UV extinction from Cardelli et al. (1989)

redge

Recombination edge.

reflect

reflection from neutral matter

refsch

E-folded power-law reflected from an ionized relativistic disk.

sedov, vsedov

Sedov model with electron and ion temperatures.

simpl

Comptonization of a seed spectrum.

sirf

Multi-blackbody self-irradiated funnel model.

smaug

Model for an optically-thin, spherically-symmetric thermal plasma.

smedge

Smoothed absorption edge.

spexpcut

Super-exponential cutoff absorption.

spline

Spline multiplicative factor.

srcut

Synchrotron radiation from cut-off electron distribution.

sresc

Synchrotron radiation from escape-limited electron distribution.

SSSice

Einstein Observatory SSS ice absorption.

step

Step function convolved with gaussian.

suzpsf

Suzaku PSF mixing model

swind1

Absorption by partially ionized material with large velocity shear.

tbabs, ztbabs, tbgrain, tbvarabs

Absorption due to the ISM including molecules and grains.

uvred

UV reddening.

varabs, zvarabs

Photoelectric absorption with variable abundances.

wabs, zwabs

Photoelectric absorption (Morrison & McCammon).

wndabs, zwndabs

Photoelectric absorption with low energy window.

xion

The reflected spectrum from a photo-ionized accretion disk.

xmmpsf

XMM PSF model

zashift

Redshift an additive model.

zbabs

EUV ISM attenuation.

zdust

Extinction by dust grains (Pei, 1992).

zigm

UV/Optical attenuation by the intergalactic medium.

zmshift

Redshift a multiplicative model.

zredden

Redshifted IR/optical/UV extinction from Cardelli et al. (1989)

zsmdust

Extinction by dust grains in starburst galaxies.

zvfeabs

Redshifted absorption with variable iron abundance.

zxipcf

Partial covering absorption by partially ionized material.

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