dustem_fit_sed_extsed_readme.pro
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PRO dustem_fit_sed_extsed_readme,postscript=postscript,model=model,help=help,itermax=itermax
;This Readme describes how to fit total intensity and polarization SEDs jointly
;Obviously, the dustem package must have been installed succesfully
;see DustemWrap documentation for install instructions.
;+
; NAME:
; dustem_fit_sed_polsed_readme
; PURPOSE:
; This is an example of how to fit total intensity and polarization SEDs jointly
; It is meant to be an example to follow when writing your own
; programs using the dustem IDL wrapper.
; CATEGORY:
; Dustem
; CALLING SEQUENCE:
; dustem_fit_sed_polsed_readme,postcript=postcript,mode=mode,help=help
; INPUTS:
; None
; OPTIONAL INPUT PARAMETERS:
; None
; OUTPUTS:
; None
; OPTIONAL OUTPUT PARAMETERS:
; None
; ACCEPTED KEY-WORDS:
; postcript = if set plot is done in DUSTEM/Docs/Figures/Last_dustem_fit.ps
; help = If set print this help
; COMMON BLOCKS:
; None
; SIDE EFFECTS:
; None
; RESTRICTIONS:
; The dustem idl wrapper must be installed
; PROCEDURE:
; None
; EXAMPLES
; dustem_fit_sed_extsed_readme,/postscript
; MODIFICATION HISTORY:
; Written by J.P. Bernard June 29th 2011
; see evolution details on the dustem cvs maintained at CESR
; Contact J.-Ph. Bernard (Jean-Philippe.Bernard@cesr.fr) in case of problems.
;-
IF keyword_set(help) THEN BEGIN
doc_library,'dustem_fit_sed_extsed_readme'
goto,the_end
ENDIF
;=== initialise dustem
;dustem_init,mode='COMPIEGNE_ETAL2010',/pol
use_model='COMPIEGNE_ETAL2010'
IF keyword_set(model) THEN use_model=model
dustem_init,mode=use_model
!dustem_verbose=1
!dustem_show_plot=1
IF keyword_set(postscript) THEN BEGIN
ps_dir=!dustem_dat+'/Docs/Figures/'
force_mkdir,ps_dir
ENDIF
;stop
;==== read emission SED
dir=!dustem_wrap_soft_dir+'/Data/SEDs/'
file=dir+'Gal_composite_spectrum.xcat'
;file=dir+'Mathis1990_DISM.xcat'
;file=dir+'Gal_composite_spectrum_wAKARI.xcat'
;stop
spec=read_xcat(file,/silent)
ind=where(spec.error EQ 0.,count)
IF count NE 0 THEN spec(ind).error=0.2*spec(ind).spec
ind=where(spec.instru EQ 'FIRAS',count)
IF count NE 0 THEN spec(ind).error=0.2*spec(ind).spec
;==== read extinction SED
dir=!dustem_wrap_soft_dir+'/Data/EXTs/'
file=dir+'Mathis1990_DISM.xcat'
extsed=read_xcat(file,/silent)
ind=where(extsed.error EQ 0.,count)
IF count NE 0 THEN extsed[ind].error=0.2*spec(ind).spec
st=dustem_set_data(ext=extsed,sed=spec,rchi2_weight=rchi2_weight,f_HI=f_HI)
;=== Set which parameters you want to fit
pd = [ $
'(*!dustem_params).gas.G0', $ ;G0
'(*!dustem_params).grains(0).mdust_o_mh',$ ;PAH0 mass fraction
'(*!dustem_params).grains(1).mdust_o_mh',$ ;PAH1 mass fraction
'(*!dustem_params).grains(2).mdust_o_mh' $ ;amCBEx
]
p_truth=[1.,7.8000E-04,7.8000E-04,1.6500E-04]
;=== set initial value of parameters you want to fit
;iv=p_truth ;exact solution
iv=p_truth+[0.,3.e-5,1.e-5,-2.e-5] ;shifted from solution
ulimed=[0 , 0 ,0 ,0 ]
llimed=[1 , 1 ,1 ,1 ]
llims =[0. ,0. ,0. ,0.]
;== SET THE FITTED PARAMETERS (now done in dustem_init_parinfo)
dustem_init_parinfo,pd,iv,up_limited=ulimed,lo_limited=llimed,up_limits=ulims,lo_limits=llims
;=== RUN fit
tol=1.e-10
xtol=1.e-10
Nitermax=2 ;maximum number of iteration. This is the criterium which will stop the fit procedure
IF keyword_set(itermax) THEN Nitermax=itermax
xrange=[1.,2.e4]
yrange=[1e-4,1.e3]
loadct,13
;!y.range=[1e-8,100] ;This is to ajust plot range from outside the routine
t1=systime(0,/sec)
yr=[1e-4,10]
xr=[1,1.e5]
legend_xpos=0.6
legend_ypos=0.8
tit='DUSTEMWrapper Intensity SED (Running)'
ytit=textoidl('I_\nu (MJy/sr) for N_H=10^{20} H/cm^2')
xtit=textoidl('\lambda (\mum)')
res=dustem_mpfit_data(tol=tol,xtol=xtol,Nitermax=Nitermax,xrange=xrange,/xstyle,yrange=yrange,/ysty,/ylog,/xlog,xtit=xtit,ytit=ytit,legend_xpos=legend_xpos,legend_ypos=legend_ypos,title=tit)
t2=systime(0,/sec)
print,(res-p_truth)/p_truth*100.
;=== SAVE FIT RESULTS
file_out='/tmp/DUSTEM_sedextsed_fit_example.sav'
dustem_save_system_variables,file_out
message,'Saved '+file_out,/continue
;======================================
;====You can exit IDL here and re-enter
;======================================
file='/tmp/DUSTEM_sedextsed_fit_example.sav'
dustem_restore_system_variables,file
;=== Plot best fit intensity SED
win=0L
window,win & win=win+1
cleanplot
xrange=[1.,2.e4]
yrange=[1e-4,1.e3]
res=*(*!dustem_fit).current_param_values
chi2=(*!dustem_fit).chi2
rchi2=(*!dustem_fit).rchi2
errors=(*(*!dustem_fit).current_param_errors)*(*(*!dustem_fit).param_init_values)
tit='DUSTEMWrapper polarization dust Example (Saved)'
ytit=textoidl('I_\nu (MJy/sr) for N_H=10^{20} H/cm^2')
xtit=textoidl('\lambda (\mum)')
dustem_sed_plot,*(*!dustem_fit).current_param_values,ytit=ytit,xtit=xtit,title=tit,yr=yrange,xr=xrange,/ysty,/xsty,res=res,errors=errors,chi2=chi2,rchi2=rchi2,/xlog,/ylog,legend_xpos=legend_xpos,legend_ypos=legend_ypos
loadct,13
IF keyword_set(postscript) THEN BEGIN
previous_device=!d.name
set_plot,'PS'
!p.charsize=0.8
ps_file=ps_dir+'Last_dustem_sed_fit.ps'
device,filename=ps_file,/color
dustem_sed_plot,*(*!dustem_fit).current_param_values,ytit=ytit,xtit=xtit,title=tit,yr=yrange,xr=xrange,/ysty,/xsty,res=res,errors=errors,chi2=chi2,rchi2=rchi2,/xlog,/ylog,legend_xpos=legend_xpos,legend_ypos=legend_ypos
device,/close
set_plot,previous_device
message,'wrote '+ps_file,/info
ENDIF
;stop
;=== Plot best fit Extinction SED
loadct,13
window,win & win=win+1
cleanplot
xr=[0.3,40]
yr=[1.e-26,1.e-21]
dustem_extsed_plot,*(*!dustem_fit).current_param_values,pol=pol,xr=xr,yr=yr,/xsty,/ysty
IF keyword_set(postscript) THEN BEGIN
previous_device=!d.name
set_plot,'PS'
!p.charsize=0.8
ps_file=ps_dir+'Last_dustem_ext_ir_fit.ps'
device,filename=ps_file,/color
dustem_extsed_plot,*(*!dustem_fit).current_param_values,pol=pol,xr=xr,yr=yr,/xsty,/ysty
device,/close
set_plot,previous_device
message,'wrote '+ps_file,/info
ENDIF
;stop
loadct,13
window,win & win=win+1
cleanplot
xr=[0.2,10]
yr=[0,3e-21]
dustem_extsed_plot,*(*!dustem_fit).current_param_values,pol=pol,xr=xr,yr=yr,/xsty,/ysty,/UV
IF keyword_set(postscript) THEN BEGIN
previous_device=!d.name
set_plot,'PS'
!p.charsize=0.8
ps_file=ps_dir+'Last_dustem_ext_uv_fit.ps'
device,filename=ps_file,/color
dustem_extsed_plot,*(*!dustem_fit).current_param_values,pol=pol,xr=xr,yr=yr,/xsty,/ysty,/UV
device,/close
set_plot,previous_device
message,'wrote '+ps_file,/info
ENDIF
print,'dustem_mpfit_sed executed in ',t2-t1,' sec'
stop
the_end:
END