Документ взят из кэша поисковой машины. Адрес оригинального документа : http://hea-www.harvard.edu/PINTofALE/pro/squishem.pro Дата изменения: Fri Apr 2 21:51:07 2004 Дата индексирования: Tue Oct 2 00:44:33 2012 Кодировка: Поисковые слова: туманность андромеды

function squishem,idstr,abund=abund,mproxy=mproxy, _extra=e
;+
;function squishem
; returns a new ID structure from the old one with all the
; multiple IDs (if any) squished into a single ID pointing
; to the one with the highest peak emissivity. If the IDs
; include different elements, their emissivities are combined
; in the ratio of their abundances.
;
; a few more words about this combining:
; o the >fluxes< are combined without regard to abundance, i.e.,
; are added up directly. this is because the fluxes are assumed
; to already include all info about DEMs, abundances, ion balance,
; and so on. besides, UPDATID splits a measured flux value simply
; on the basis of the ion-balanced emissivities.
; o the >emissivities< are combined by normalizing the weaker IDs to
; that of the strongest ID in the ratio of the abundances. because
; the main ID itself only retains the strongest ID, the absolute
; abundance on the emissivity is not set, but relative abundances
; are fixed.
;
;syntax
; sqID=squishem(idstr,abund=abund)
;
;parameters
; idstr [INPUT; required] an ID structure, e.g., output of LINEID
;
;keywords
; abund [INPUT] abundances relative to H (abund(0)=1)
; * abund(Z-1) contains the abundance for element Z
; * if array size is smaller than the largest present Z,
; the last element is replicated to fill the gap
; * default: Anders & Grevesse (1989)
; mproxy [OUTPUT] if set, will output 2 dimensional MPROXY string
; as prescribed by MIXIE()
; _extra [JUNK] here only to avoid crashing the program
;
;subroutines
; GETABUND
; ZION2SYMB
; INICON
;history
; vinay kashyap (FebMM)
; bug correction with flux err (VK; MarMM)
; unknown IDs were crashing at abundances; added call to ZION2SYMB
; (VK; MMJul)
; ADDED MPROXY keyword (Feb2004)
;-

; usage
ok='ok' & np=n_params() & nid=n_tags(idstr)
if np eq 0 then ok='Insufficient parameters' else $
if nid eq 0 then ok='IDs should be in a structure' else $
if nid eq 1 then ok='input format incompatible' else begin
nw=n_elements(idstr.(0))
if nid ne nw+1L then ok='Input in unknown format'
endelse
if ok ne 'ok' then begin
print,'Usage: squished_ID=squishem(idstr,abund=abund)'
print," convert multiply ID'd lines to simple single IDs"
if np ne 0 then message,ok,/info
if np eq 0 then return,0L
return,idstr
endif

; abundances
nabu=n_elements(abund)
defabu=getabund('anders & grevesse') & abu=defabu
if nabu eq 0 then abu=defabu else begin
abu(*)=abund(nabu-1L)
if nabu lt n_elements(defabu) then abu(0L:nabu-1L)=abund else $
abu(*)=abund(0L:n_elements(defabu)-1L)
endelse

; start copying the old ID structure into new, squished, one
tnames=tag_names(idstr)
sqid=create_struct(tnames(0),idstr.(0))
tmproxy = strarr(2,2)
inicon, atom=atom,roman=roman
for id=1L,nid-1L do begin ;{step through IDSTR
tmp=idstr.(id) & mtmp=n_tags(tmp)
ww=tmp.WVL & zz=tmp.Z & ii=tmp.ION & ll=tmp.LABL
ff=tmp.FLUX & ffee=tmp.FLUXERR & tt=tmp.LOGT & ee=tmp.EMIS
if mtmp gt 8 then ss=tmp.NOTES else ss=''
;
zab=abu([zz-1]) & zion2symb,zz,ii,zymb,ziform='Z0'
mw=n_elements(ww) & ml=n_elements(ll) & emx=dblarr(mw)
for i=0L,mw-1L do emx(i)=max(reform(ee(*,i)))
eemx=max(zab*emx,jmx)
w0=ww(jmx) & z0=zz(jmx) & i0=ii(jmx) & f0=0*ff(jmx) & fe0=0*ffee(jmx)
e0=0.D*tt
if ml eq 1 then l0=ll
if ml eq 2 then l0=ll
if ml gt 2 then l0=ll(*,jmx)
zab=abu([zz-1]) & if z0 gt 0 then zab=zab/abu(z0-1)
;
;stop
for i=0L,mw-1L do begin ;{add up multiple components
if arg_present(mproxy) then begin;and i ne jmx then begin
bse = strcompress(string(id-1),/remove_all)
prxee = atom[tmp.z(i)-1]+roman[tmp.ion(i)-1]+' '+$
strjoin(tmp.labl(*,i),' ')
tmproxy = [tmproxy,transpose([bse,prxee])]
endif
emis=reform(ee(*,i))
e0=e0+zab(i)*emis
;f0=f0+zab(i)*ff(i)
;fe0=fe0+(zab(i)*ffee(i))^2
f0=f0+ff(i)
fe0=fe0+ffee(i)^2
;if i eq 0 then s0=strtrim(zab(i),2)+'*'+strtrim(ff(i),2)
;if i gt 0 then s0=s0+' +'+strtrim(zab(i),2)+'*'+strtrim(ff(i),2)
if i eq 0 then s0=strtrim(zab(i),2)+'* E('+zymb(i)+')'
if i gt 0 then s0=s0+' +'+strtrim(zab(i),2)+'* E('+zymb(i)+')'
endfor ;I=0,MW-1}
fe0=sqrt(fe0)
s0='EMIS = '+s0
;
if arg_present(mproxy) then begin
if n_elements(tmproxy) ne 4 then mproxy = transpose(tmproxy[2:*,*]) else $
mproxy='none'
endif
if mw gt 1 then ss=ss+string("12b)+s0 else ss=s0
tstr=create_struct('WVL',[w0],'Z',[z0],'ION',[i0],$
'LABL',l0,'FLUX',[f0],'FLUXERR',[fe0],$
'LOGT',tt,'EMIS',e0,'NOTES',ss)
sqid=create_struct(sqid,tnames(id),tstr)
endfor ;ID=1,NID}

return,sqid
end