dustem_define_grid.pro
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PRO dustem_define_grid,table_name $
,filters=filters $
,help=help $
,table_params=table_params $
,table_pmins=table_pmins $
,table_pmaxs=table_pmaxs $
,table_pnvals=table_pnvals $
,table_plogs=table_plogs $
,status=status
;+
; NAME:
; dustem_define_grid
; PURPOSE:
; loads an SED Grid table into !dustem_grid
; CATEGORY:
; Dustem
; CALLING SEQUENCE:
; dustem_define_grid,table_name,filters[,table_params=][,table_pmins=][,table_pmaxs=][,table_pnvals=][,table_plogs=]
; INPUTS:
; table_name : fits file name containing the grid
; filters : name of dustemwrap filters to be included in the GRID
; OPTIONAL INPUT PARAMETERS:
; NONE
; OUTPUTS:
; None
; OPTIONAL OUTPUT PARAMETERS:
; table_params= parameter names in the grid table
; table_pmins= parameter min values in the grid table
; table_pmaxs= parameter max values in the grid table
; table_pnvals= parameter number of values in the grid table
; table_plogs= 1=parameter values in log in the grid table, 0=linear
; ACCEPTED KEY-WORDS:
; help = If set, print this help
; COMMON BLOCKS:
; None
; SIDE EFFECTS:
; !dustem_grid is updated
; RESTRICTIONS:
; The DustEM fortran code must be installed
; The DustEMWrap IDL code must be installed
; PROCEDURE:
; None
; EXAMPLES
; dustem_make_sed_table,'DBP90',['(*!dustem_params).G0','(*!dustem_params).grains(0).mdust_o_mh'], $
; [0.1,1.e-3],[100.,1.e-1],[10,3],filename='/tmp/IRAS_GO.fits',plog=[1,0],/show_seds, $
; filters=[dustem_instru2filters('IRAC'),dustem_instru2filters('SPIRE')]
; dustem_define_grid,'/tmp/IRAS_GO.fits',['IRAC3','SPIRE2']
; help,!dustem_grid
; MODIFICATION HISTORY:
; Written by J.-Ph. Bernard (2023)
; 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_define_grid'
goto,the_end
ENDIF
;=== read the grid table
message,'reading grid data from '+table_name,/continue
;stop
info=file_info(table_name)
status=1
IF info.exists THEN BEGIN
st0=mrdfits(table_name,0,h0) ;This gets the main header
st_params=mrdfits(table_name,1,h_params)
st_seds=mrdfits(table_name,2,h_seds)
ENDIF ELSE BEGIN
message,'grid data '+table_name+' not found',/continue
status=-1
goto,the_end
;stop
ENDELSE
;stop
;=== get filters and params names from grid table header
i=0L
table_filters=['']
fname='bidon'
count=1
WHILE count NE 0 DO BEGIN
fname=sxpar(h0,'FNAME'+strtrim(i+1,2),count=count)
IF count NE 0 THEN table_filters=[table_filters,strtrim(fname,2)]
i=i+1
ENDWHILE
table_filters=table_filters[1:*]
Ntfilters=n_elements(table_filters)
;stop
table_params=['']
table_pmins=[0.d0]
table_pmaxs=[0.d0]
table_pnvals=[0L]
table_plogs=[0]
count=1
i=0L
WHILE count NE 0 DO BEGIN
pname=sxpar(h0,'PNAME'+strtrim(i+1,2),count=count)
IF count NE 0 THEN BEGIN
table_params=[table_params,strtrim(pname,2)]
pmin=sxpar(h0,'PMIN'+strtrim(i+1,2),count=count)
pmax=sxpar(h0,'PMAX'+strtrim(i+1,2),count=count)
pnval=sxpar(h0,'PNVAL'+strtrim(i+1,2),count=count)
plog=sxpar(h0,'PLOG'+strtrim(i+1,2),count=count)
table_pmins=[table_pmins,pmin]
table_pmaxs=[table_pmaxs,pmax]
table_pnvals=[table_pnvals,pnval]
table_plogs=[table_plogs,plog]
ENDIF
i=i+1
ENDWHILE
table_params=table_params[1:*]
table_pmins=table_pmins[1:*]
table_pmaxs=table_pmaxs[1:*]
table_pnvals=table_pnvals[1:*]
table_plogs=table_plogs[1:*]
Ntparams=n_elements(table_params)
;stop
;=== select only requested filters
;stop
use_filters=table_filters ;default is to keep all filters
IF keyword_set(filters) THEN use_filters=filters
Nfilters=n_elements(use_filters)
keep_tfilters=intarr(Ntfilters) ;filters to be kept in SED
add_tfilters=intarr(Nfilters) ;filters to be added to the table SEDs
tags=tag_names(st_seds[0])
FOR i=0L,Nfilters-1 DO BEGIN
ind=where(table_filters EQ use_filters[i],count)
IF count NE 0 THEN BEGIN
keep_tfilters[ind]=1
ENDIF ELSE BEGIN
add_tfilters[i]=1
ENDELSE
ENDFOR
ind_add=where(add_tfilters EQ 1,count_add)
;stop
;==== remove un-needed filters from the table SEDs
FOR i=0L,Ntfilters-1 DO BEGIN
IF keep_tfilters[i] EQ 0 THEN BEGIN
col_name=tags[i]
st_seds=structure_remove_column(st_seds,col_name)
ENDIF
ENDFOR
;stop
previous_st_seds=st_seds
;==== add filters not present in the table SEDs (setting corresponding intensities to zero)
;==== while keeping column TOTAL at the end.
IF count_add NE 0 THEN BEGIN
totals=st_seds.total
st_seds=structure_remove_column(st_seds,'TOTAL')
FOR i=0L,count_add-1 DO BEGIN
col_name='I'+use_filters[i]
st_seds=structure_add_column(st_seds,col_name,0.)
table_filters=[table_filters,use_filters[i]] ;== modify table_filters accordingly
ENDFOR
new_filters=strmid(tag_names(st_seds[0]),1,1000)
Ntfilters=n_elements(table_filters)
wavs=dustem_filter2wav(new_filters)
order=sort(wavs)
;stop
st_seds=structure_order_column(st_seds,order)
table_filters=table_filters[order]
;stop
st_seds=structure_add_column(st_seds,'TOTAL',0.)
st_seds.total=totals
ENDIF
sed_totals=st_seds.(Nfilters-1)
;stop
;==== recompute totals
Nsed=n_elements(st_seds)
;==== recompute totals (needed if some columns have been removed)
FOR i=0L,Nsed-1 DO BEGIN
this_total=0.d0
FOR j=0L,Nfilters-1 DO BEGIN
;this_total=this_total+(st[i]).(j+Ntparams)
this_total=this_total+st_seds[i].(j)
ENDFOR
sed_totals[i]=this_total
ENDFOR
;stop
dustem_grid={Nsed:Nsed $ ;
,Nfilters:Nfilters $ ;
,Nparams:Ntparams $ ;
,filters:use_filters $ ;
,params:table_params $;
,st_seds:st_seds $ ;
,st_params:st_params $ ;
,sed_totals:sed_totals $ ;
,pmin_values:table_pmins $ ;
,pmax_values:table_pmaxs $ ;
,pnvals:table_pnvals $;
,plog:table_plogs $
}
;defsysv,'!dustem_grid',dustem_grid
defsysv,'!dustem_grid',ptr_new(dustem_grid)
message,'Defined !dustem_grid',/continue
the_end:
END