|
1.0 | the version from xspec v11.1 |
1.1 | as 1.0 but with updated ionization fractions using dielectronic recombination rates from Mazzotta et al (1998) |
2.0 | same ionization fractions as 1.1 but uses AtomDB v2 to calculate the resulting spectrum |
3.x | ionization fractions and spectrum calculation uses AtomDB v3.x |
Note that versions 1.x have no emission from Ar. For versions 3.x and later additional xset options are available and are listed under the documentation for nei.
For the sedov model the parameters are:
par1 | Mean shock temperature (keV) |
par2 | Electron temperature immediately behind the shock front (keV) |
par3 | Metal abundances (He fixed at that defined by the abund command). The elements included are C, N, O, Ne, Mg, Si, S, Ar, Ca, Fe, Ni. Abundances are defined by the abund command |
par4 | Ionization age (s/cm) of the remnant (= electron density immediately behind the shock front multiplied by the age of the remnant). |
par5 | redshift |
norm | , where is the angular diameter distance to the source (cm), is the volume element (cm), and and are the electron and H densities (cm), respectively |
For the vsedov model, the parameters are:
par1 | Mean shock temperature (keV) |
par2 | Electron temperature immediately behind the shock front (keV) |
par3 | H abundance (set to 0 for no free-free continuum, otherwise 1) |
par4–par15 | Abundances for He, C, N, O, Ne, Mg, Si, S, Ar, Ca, Fe, Ni wrt Solar (defined by the abund command) |
par16 | Ionization age (s/cm) of the remnant (= electron density immediately behind the shock front multiplied by the age of the remnant). |
par17 | Redshift, z |
norm | , where is the angular diameter distance to the source (cm), is the volume element (cm), and and are the electron and H densities (cm), respectively |
For the vvsedov model, the parameters are:
par1 | Mean shock temperature (keV) |
par2 | Electron temperature immediately behind the shock front (keV) |
par3 | H abundance (set to 0 for no free-free continuum, otherwise 1) |
par4–par32 | Abundances for all elements with 2 Z 30 wrt Solar (defined by the abund command) |
par33 | Ionization age (s/cm) of the remnant (= electron density immediately behind the shock front multiplied by the age of the remnant). |
par34 | Redshift, z |
norm | , where is the angular diameter distance to the source (cm), is the volume element (cm), and and are the electron and H densities (cm), respectively |
For the bsedov model the parameters are:
par1 | Mean shock temperature (keV) |
par2 | Electron temperature immediately behind the shock front (keV) |
par3 | Metal abundances (He fixed at that defined by the abund command). The elements included are C, N, O, Ne, Mg, Si, S, Ar, Ca, Fe, Ni. Abundances are defined by the abund command |
par4 | Ionization age (s/cm) of the remnant (= electron density immediately behind the shock front multiplied by the age of the remnant). |
par5 | redshift |
par6 | gaussian velocity broadening (sigma in km/s) |
norm | , where is the angular diameter distance to the source (cm), is the volume element (cm), and and are the electron and H densities (cm), respectively |
For the bvsedov model, the parameters are:
par1 | Mean shock temperature (keV) |
par2 | Electron temperature immediately behind the shock front (keV) |
par3 | H abundance (set to 0 for no free-free continuum, otherwise 1) |
par4–par15 | Abundances for He, C, N, O, Ne, Mg, Si, S, Ar, Ca, Fe, Ni wrt Solar (defined by the abund command) |
par16 | Ionization age (s/cm) of the remnant (= electron density immediately behind the shock front multiplied by the age of the remnant). |
par17 | Redshift, z |
par18 | gaussian velocity broadening (sigma in km/s) |
norm | , where is the angular diameter distance to the source (cm), is the volume element (cm), and and are the electron and H densities (cm), respectively |
Finally, for the bvvsedov model, the parameters are:
par1 | Mean shock temperature (keV) |
par2 | Electron temperature immediately behind the shock front (keV) |
par3 | H abundance (set to 0 for no free-free continuum, otherwise 1) |
par4–par32 | Abundances for all elements with 2 Z 30 wrt Solar (defined by the abund command) |
par33 | Ionization age (s/cm) of the remnant (= electron density immediately behind the shock front multiplied by the age of the remnant). |
par34 | Redshift, z |
par35 | gaussian velocity broadening (sigma in km/s) |
norm | , where is the angular diameter distance to the source (cm), is the volume element (cm), and and are the electron and H densities (cm), respectively |
HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public
Last modified: Friday, 23-Aug-2024 13:20:40 EDT