xset
set variables for XSPEC models
Modify a number of XSPEC internal switches.
Syntax: xset [abund |cosmo |delta |mdatadir |method |seed |statistic |usechainrule |weight |xsect |<string_name>] [ <options>|<string_value>]
The arguments abund, cosmo, method, statistic, weight, and xsect just run the appropriate XSPEC commands. mdatadir changes the directory in which XSPEC searches for model data files. You probably don't want to change this. The seed option requires an integer argument, which will then be used to immediately re-seed and re-initialize XSPEC's random-number generator.
The delta option is for setting fit delta values (see the newpar command) which are proportional to the current parameter value rather than fixed. For example,
XSPEC12> xset delta .15will set each parameter fit delta to .15 * parVal. To turn proportional deltas off and restore the original fixed deltas, set delta to a negative value or 0.0. The current proportional delta setting can be seen with show control.
The usechainrule option can be used to switch between the fast (usechainrule yes) and slow (usechainrule no) options when calculating the derivatives of the fit statistic.
The <string_name> option can be used to pass string values to models. XSPEC maintains a database of <string_name>, <string_value> pairs created using this command. Individual model functions can then access this database. Note that xset does no checking on whether the <string_name> is used by any model so spelling errors will not be trapped.
To access the <string_name>, <string_value> database from within a model function use the fortran function fgmstr. This is defined as character*128 and takes a single argument, the string name as a character*128. If the <string_name> has not been set then a blank string will be returned.
The current <string_name> options, models to which they apply and brief descriptions are given in the following table :
| APECROOT or SPEXROOT | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)expcheb6, (b)(v)(v)gadem, (v)mekal, mkcflow, nlapec, (b)snapec, (b)(v)(v)tapec, vmcflow | Switch from default APEC or SPEX input files. |
| APECTHERMAL or SPEXTHERMAL | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Thermally broaden emission lines in APEC or SPEX input files. |
| APECVELOCITY or SPEXVELOCITY | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Velocity broaden emission lines in APEC or SPEX input files. |
| APECMINFLUX or SPEXMINFLUX | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Set minimum flux for line broadening when using APEC or SPEX input files. |
| APECBROADPSEUDO or SPEXBROADPSEUDO | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Broaden pseudo-continuum lines when using APEC or SPEX input files. |
| APECNOLINES or SPEXNOLINES | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Continuum only when using APEC or SPEX input files. |
| APEC_TRACE_ABUND or SPEX_TRACE_ABUND | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Set trace element abundances when using APEC or SPEX input files. |
| APECLOGINTERP or SPEXLOGINTERP | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Use logarithmic interpolation between tabulated temperatures when using APEC or SPEX input files. |
| APECMULTITHREAD or SPEXMULTITHREAD | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Parallelize over temperatures when calculating the lines in the spectrum using the APEC or SPEX input files. |
| APECEEBREMSS or SPEXEEBREMSS | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)equil, (b)(v)expcheb6, (b)(v)(v)gadem, (b)(v)(v)gnei, (v)mekal, mkcflow, (b)(v)(v)nei, nlapec, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov, (b)snapec, (b)(v)(v)tapec, vmcflow | Include calculation of the e-e bremsstrahlung when using the APEC or SPEX input files. |
| APECUSESPEX | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)(v)cie, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)expcheb6, (b)(v)(v)gadem, (v)mekal, mkcflow, nlapec, (b)snapec, (b)(v)(v)tapec, vmcflow | Switch from APEC to SPEX input files but apply all other APEC settings. |
| APECUSENEI | (b)(v)(v)apec, c6(v)mekl, c6p(v)mekl, ce(v)mkl, (b)(v)cempow, (b)(v)cheb6, (b)(v)coolflow, (b)(v)(v)dem, (b)(v)expcheb6, (b)(v)(v)gadem, (v)mekal, mkcflow, nlapec, (b)snapec, (b)(v)(v)tapec, vmcflow | Use NEI code to calculate CEI spectra. |
| NEIAPECROOT | (b)(v)equil, (b)(v)(v)gnei, (b)(v)(v)nei, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov | Switch from default NEIAPEC input files. |
| NEIVERS | (b)(v)equil, (b)(v)(v)gnei, (b)(v)(v)nei, (b)(v)(v)npshock, (b)(v)(v)pshock, (b)(v)(v)rnei, (b)(v)(v)sedov | Set version of NEI calculations. |
| POW_EMIN, POW_EMAX | powerlaw, bknpower, bkn2pow, cutoffpl | Switch to normalize to a flux calculated over an energy range. |
| CFLOW_VERSION | mkcflow, vmclow | Switch CFLOW version number. |
| CFLOW_NTEMPS | mkcflow, vmclow | Switch number of temperature bins used in CFLOW model. |
| SUZPSF-IMAGE | suzpsf | Set image file to be used for surface brightness. |
| SUZPSF-RA | suzpsf | Set RA for center surface brightness map which is taken from the WMAP. |
| SUZPSF-DEC | suzpsf | Set Dec for center surface brightness map which is taken from the WMAP. |
| SUZPSF-MIXFACT-IFILE# | suzpsf | Set filename to read mixing factors. |
| SUZSF-MIXFACT-OFILE# | suzpsf | Set filename to write mixing factors. |
| XMMPSF-IMAGE | xmmpsf | Set image file to be used for surface brightness. |
| XMMPSF-RA | xmmpsf | Set RA for center surface brightness map which is taken from the WMAP. |
| XMMPSF-DEC | xmmpsf | Set Dec for center surface brightness map which is taken from the WMAP. |
| XMMPSF-MIXFACT-IFILE# | xmmpsf | Set filename to read mixing factors. |
| XMMPSF-MIXFACT-OFILE# | xmmpsf | Set filename to write mixing factors. |
| NSA_FILE | nsa | Change filename used for model data. |
| NSAGRAV_DIR | nsagrav | Change directory used for model data files. |
| NSMAX_DIR | nsmax | Change directory used for model data files. |
| ZXIPCF_DIR | zxipcf | Change directory used for model data files. |
Examples:
XSPEC12> xset neivers 2.0 // Set the NEIVERS variable to 2.0 XSPEC12> xset // List the current string variables XSPEC12> xset apecroot /foo/bar/apec_v1.01 // Set the APECROOT variable XSPEC12> xset seed 1515151 // Re-initialize the pseudo random-number generator // with the seed value 1515151