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: http://star.arm.ac.uk/~csj/idl/IDL_idlines.html
Дата изменения: Tue May 5 13:06:42 2009 Дата индексирования: Tue Oct 2 03:21:33 2012 Кодировка: Поисковые слова: arp 220 |
; IDL procedure to display ; a) a region of spectrum, together with a fit, if supplied, ; b) positions and relative strengths (gf or W_lambda) of lines in ; common atomic spectra may be marked in the lower panel. ; c) lines of sleceted atoms are identified in the top panel ; ; Command arguments: ; specfile - character string - name of file containing spectrum (and fit) ; assumed to be x,y file with 3-line header ; linelist - character string - name of file containing eq.widths ; assumed to be 'spectrum' output ; xlo - real variable - lower limit of plot ; xhi - real variable - upper limit of plot ; xr - real variable - range of indivusal plot ; atoms - integer vector - atomic numbers of spectra to be identified ; [ thresh - real variable - threshold eq width or line strength to identi fy lines ] ; [ rv - real variable - radial velocity of spectrum ] ; ; Keywords: ; /FIT - overplot the fit ; /EW - read and select the lines using equivalent widths ; /NF - read and select the lines using n*gf (central opacities) ; /ALL - plot individual atomic spectra schematically ; /MULT - add multiplet labels to line ids ; /STIS - to allow for air/vacuum shift at 2000A ; /DUPLEX - plot 2 ranges of spectrum on one panel ; /XPAND - expand plot by factor 5 ; /XTEND - extend line identification marks ; /PRINT - plot hardcopy as a postscript file
readspecfit, file, specnw, specwav, specflx, specfit; read spectrum only (free format)
readlines, file, listn, listwav, listlab, listion, listmlt, listgf, listep, listfr; read spectrum and fit (sfit_synth output)
; read lines from a linelist and returns them as an array of wavelengths, ; labels, and ion identifications
markion, zel, xlo, xhi, listn, listwav, listion, listlab, listmlt, listfr, thresh; Assesses lines in linelist by the strength values "listfr". ; Positions of all lines are plotted for each element, relative to the strongest line ; due to each element in each spectral region. Note that these strengths are independent ; of abundance. The scale is logarithmic, such that the a line with 1/1000 strength ; of the the strongest line will not appear, ie if full scale = 0, the axis is at -3. ; Elements for which there are no lines in the spectral range are omitted.