dustem_fit_polarisation_example.pro
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PRO dustem_fit_polarisation_example,model=model $
,sed_file=sed_file $
,Nitermax=Nitermax $
,postscript=postscript $
,fits_save_and_restore=fits_save_and_restore $
,help=help
;This routine is an example of how to fit observational SEDs with
;DustEM and DustEMWrap. The objective is to illustrate how to use DustEMWrap
; (and not to do science -- the fit obtained by running this example is
; likely to be poor!)
;
;For this example, the code uses the SED in the file example_SED_1.xcat,
;which is distributed in the Data/EXAMPLE_OBSDATA/ directory
;
;The example SED has Stokes I photometric data points from SPITZER
;IRAC and MIPS and IRAS. Examples illustrating running DustEMWrap to
;fit data with spectral data, polarisation data and extinction data
;are provided in other _readme routines in the src/idl/ directory.
;; ***COMMENT AH***
;; Remove or update the next few lines -->>
;; No spectrum data points.
;;SPECTRUM data points can be included and the corresponding filter
;;filed must read SPECTRUM. Note that its is note necessary
;;to use the .xcat file format, and data SED can be provided
;;manually, but the observation structure must have the structure shown below.
;;For the example to work, the DustEM and DustEMWrap packages must have
;;been configured and installed succesfully.
;;See dustem_cvs_readme.txt for install instructions).
;; *** END COMMENT AH***
;+
; NAME:
; dustem_fit_polarisation_example
; PURPOSE:
; This is an example of how to fit SEDs with DustEMWrap.
; It is intended as an example to follow when writing your own
; programs to analyse data with DustEMWrap.
; CATEGORY:
; DustEMWrap, Distributed, High-Level, User Example
; CALLING SEQUENCE:
; dustem_fit_polarisation_example[,model=][sed_file=][,postscript=][,Nitermax=][,fits_save_and_restore=][,/help]
; INPUTS:
; None
; OPTIONAL INPUT PARAMETERS:
; None
; OUTPUTS:
; None
; OPTIONAL OUTPUT PARAMETERS:
; Plots, Results save structure
; ACCEPTED KEY-WORDS:
; model = specifies the interstellar dust mixture used by DustEM
; 'MC10' model from Compiegne et al 2010 (default)
; 'DBP90' model from Desert et al 1990
; 'DL01' model from Draine & Li 2001
; 'WD01_RV5p5B' model from Weingartner & Draine 2002 with Rv=5.5
; 'DL07' model from Draine & Li 2007
; 'J13' model from Jones et al 2013, as updated in
; Koehler et al 2014
; 'G17_ModelA' model A from Guillet et al (2018). Includes
; polarisation. See Tables 2 and 3 of that paper for details.
; 'G17_ModelB' model B from Guillet et al (2018)
; 'G17_ModelC' model C from Guillet et al (2018)
; 'G17_ModelD' model A from Guillet et al (2018)
; sed_file = string naming the path to text file in .xcat format that
; describes the observational SED. If not set, the file
; 'Data/SEDs/sample_SED.xcat' is used.
; postscript = if set, final plot is saved as postscript in the
; current working directory
; Nitermax = maximum number of fit iterations. Default is 5.
; fits_save_and_restore = if set, saves results in a fits file, restore the file and plot restored results
; help = if set, print this help
; COMMON BLOCKS:
; None
; SIDE EFFECTS:
; None
; RESTRICTIONS:
; The DustEM fortran code must be installed
; The DustEMWrap IDL code must be installed
; PROCEDURES AND SUBROUTINES USED:
; *** COMMENT AH --> is this really NONE? ****
; EXAMPLES
; dustem_fit_polarisation_example
; dustem_fit_polarisation_example,Nitermax=1,fits_save_and_restore='/tmp/mysavefile.fits'
; dustem_fit_polarisation_example,model='DBP90'
; MODIFICATION HISTORY:
; Written by JPB Apr-2022
; Evolution details on the DustEMWrap gitlab.
; See http://dustemwrap.irap.omp.eu/ for FAQ and help.
;-
IF keyword_set(help) THEN BEGIN
doc_library,'dustem_fit_polarisation_example'
goto,the_end
END
IF keyword_set(model) THEN BEGIN
use_model=strupcase(model)
ENDIF ELSE BEGIN
use_model='G17_MODELC' ;Default
ENDELSE
dustem_define_la_common
;=== initialise dustem
dustem_init,mode=use_model,kwords=['logn-chrg-spin','plaw-pol','plaw-pol'],/pol;,kwords=['plaw-ed','logn','logn'];,/pol;kwords=['plaw-ed-chrg-spin'],/pol;,kwords=['plaw-ed'];kwords=['plaw-ed-chrg-spin'];,/pol;
!dustem_verbose=1
!dustem_show_plot=1
!dustem_nocatch=1
filename=!dustem_wrap_soft_dir+'/Data/EXAMPLE_OBSDATA/example_sed3.xcat'
sed=read_xcat(filename)
dustem_set_data,sed
;=== Set which parameters you want to fit
pd = [ $
'(*!dustem_params).G0', $ ;G0
'(*!dustem_params).grains(0).mdust_o_mh',$ ;PAH0 mass fraction
'(*!dustem_params).grains(1).mdust_o_mh',$ ;PAH0 mass fraction
'(*!dustem_params).grains(2).mdust_o_mh' $ ;PAH1 mass fraction
;'(*!dustem_params).grains(3).mdust_o_mh',$ ;amCBEx
;'dustem_plugin_synchrotron_2', $ ;Synchrotron amplitude
;'dustem_plugin_synchrotron_4', $ ;Synchrotron polarization angle
;'dustem_plugin_modify_dust_polarization_2', $ ;Polarization angle applied to the Fortran dust model via a core plugin
;'dustem_plugin_modify_spinning_polarization_1', $
;'dustem_plugin_modify_spinning_polarization_2' $
]
;p_truth=[1.,7.8000E-04,7.8000E-04,7.8000E-04,1.6500E-04,68.,4e-3,20]
;iv=p_truth+[0.,8.e-4,8.e-4,8.e-4,8.e-4,-10.,2e-4,10] ;shifted from solution
;p_truth=[1.,7.8000E-04,7.8000E-04,7.8000E-04,1.6500E-04,5e-3,20.,68.,1.2,20]
p_truth=[1.,7.8000E-04,7.8000E-04,7.8000E-04]
iv=p_truth+[0.,1.e-4,1.e-4,1.e-4] ;shifted from solution
Npar=n_elements(pd)
ulimed=replicate(0,Npar)
llimed=replicate(1,Npar)
llims=replicate(0,Npar)
;stop
dustem_init_parinfo,pd,iv,up_limited=ulimed,lo_limited=llimed,up_limits=ulims,lo_limits=llims;,tied=tied
;stop
dustem_init_plugins,pd
;=== SET THE OBSERVATION STRUCTURE
;ind=where(sed.wave GE 0.1)
;st_bidon=dustem_set_data(m_fit=sed[ind],rchi2_weight=rchi2_weight,f_HI=f_HI) ; comment if second line is to be used
;=== RUN fit
tol=1.e-16
xtol=1.e-16
Nitermax=30; just an initialization
;for i=0L,n_tags(!dustem_data)-1 do begin
;if ptr_valid(!dustem_data.(i)) then Nitermax+=1
;endfor
;Nitermax=4 ;maximum number of iteration. This is the criterion which will stop the fit procedure
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)
title='CACA' ;does not work if title is undefined ....
res=dustem_mpfit_data(tol=tol,xtol=xtol,Nitermax=Nitermax,xrange=xrange,/xstyle,yrange=yrange,/ysty,/ylog,/xlog,xtit='wavelength [mic]',ytit='Brightness []',title=title)
t2=systime(0,/sec)
stop
the_end:
END