Exemplo n.º 1
0
def regular_spectrum_graph(line):

    allspec = ('PHOENIX/%(allspec)s' %{'allspec' : line})    
    contspec = ('PHOENIXcont/%(cont)s' %{'cont' : cont_file[0]})

       
    a = line.split('-')   

    #Calls in the file from the directory
    spectrum = load_spec(allspec)
    conspec = load_spec(contspec)    


    newgrid = np.arange(3000,12000,0.01)

    conspecflux = np.interp(newgrid, conspec[:,0], conspec[:,1])
    specflux = np.interp(newgrid, spectrum[:,0], spectrum[:,1])

    conspecflux = convolve(conspecflux, 0.15)
    specflux = convolve(specflux, 0.15)

    divflux = specflux/conspecflux

    plt.title('Spectrum Comparison For nlte and lte Effects \n On a T_eff = 4500K Star \n Smoothed by convolution with gaussian curve FWHM = 0.15 Angstroms'.format(a[1]))
    plt.xlabel('Wavelength (Angstroms)')
    plt.ylabel('Normalized Flux $(Flux/1.2*10^{14})$')
    plt.grid(True)
    #plt.plot(spectrum[:,0], spectrum[:,1])
    plt.plot(newgrid, divflux) # ,label = '%(type)s, $[Fe/H]$ = -%(metal)s'   %{ 'type'  :a[0], 'metal' :a[3][0:3]})
Exemplo n.º 2
0
def Relative_spec(nltespec, ltespec):
    '''
            FUNCTION CURRENTLY DOES NOT WORK PROPERLY!!! 
            THIS IS AN ARTIFACT OF ME CREATING THE .norm.7 FILES
            TO INCREASE PROGRAM SPEED.


    '''

    model = array(Spec_Normalize(nltespec, ltespec)).T

    a = nltespec.split('-')
    #b = ltespec.split('-')
    #Modelspecfile = ('PHOENIX/%(allspec)s' %{'allspec' : model})
    Arcturusspec = ltespec

    specgrid = np.arange(3000, 12000, 0.01)

    ModelSpec = model
    Arcturus = Arcturusspec

    ModelSpecFlux = np.interp(specgrid, ModelSpec[:, 0], ModelSpec[:, 1])
    ArcturusFlux = np.interp(specgrid, Arcturus[:, 0], Arcturus[:, 1])

    print 'Plotting {} model,  Teff= {}K '.format(
        a[0], a[1]), '[Fe/H]= -{}'.format(a[3][0:3]), 'iter=', i

    ModelSpec2 = convolve(ModelSpecFlux, macroturb, 0.01)  #Macroturbulence
    ModelSpec3 = convolve(ModelSpec2, 2, 0.01)  #Spectrograph

    RelativeSpec = 100. * (ModelSpec3 - ArcturusFlux) / ArcturusFlux

    Unity = array((specgrid, RelativeSpec)).T

    Unity2 = Unity[(Unity[:, 0] <= 7300)]

    SpecSigma = np.std(Unity2[:, 1])
    SpecMean = np.mean(Unity[:, 1])
    print 'Spectrum Mean= ', SpecMean
    print 'Standard Deviation= ', SpecSigma

    plt.plot(Unity2[:, 0],
             Unity2[:, 1],
             label='[Teff] = {}K, model={}, cTeff= {}K'.format(
                 a[1], a[0], b[1]))
    #plt.ylim(-100,1000)
    plt.xlim(linecentre - dx, linecentre + dx)
    plt.grid(True)
    plt.legend()
    plt.ylabel('$(F_{NLTE} - F_{OBS})/F_{OBS}$ (%)')
    plt.xlabel('Wavelength, ($\AA$)')
    plt.title(
        'Relative Spectrum Differences \n Between Model and Observed Spectra for Arcturus \n '
    )

    return RelativeSpec
Exemplo n.º 3
0
def Relative_spec(xmin, xmax, i):
    scales = [0.995,1.02,0.997,1.02,0.997,1.02]    
    ModelSpec = array(Spec_Normalize(file_list[i],cont_file[i//2])).T
    Arcturus = arcturus_link()
    a = file_list[i].split('-')
    #Modelspecfile = ('PHOENIX/%(allspec)s' %{'allspec' : model})     
    
    specgrid = np.arange(xmin, xmax, 0.01)    
    Arcturus = Arcturus[(Arcturus[:,0] >= xmin) & (Arcturus[:,0] <= xmax)]
    ModelSpec = ModelSpec[(ModelSpec[:,0] >= xmin) & 
                          (ModelSpec[:,0] <= xmax) ]    
    
    
    
    ModelSpecFlux = np.interp(specgrid, ModelSpec[:,0], ModelSpec[:,1])
    ArcturusFlux  = np.interp(specgrid, Arcturus[:,0]  , Arcturus[:,1])
    
    
    ModelSpec2 = convolve(ModelSpecFlux, 6 , 0.01)


    RelativeSpec = 100.*(ModelSpec2/scales[i] - ArcturusFlux)/ArcturusFlux
    
    Unity = array((specgrid, RelativeSpec )).T
    #Unity = Unity[(Unity[:,1] <= 1000 ) & (Unity[:,1] >= -1000)]
    plt.plot(Unity[:,0], Unity[:,1], label = 'Type: {}, T = {}K'.format(a[0],a[1]))
    plt.ylim(-100,1000)
    plt.grid(True)
    plt.legend()
    plt.ylabel('Relative Flux')
    plt.xlabel('Wavelength, ($\AA$)')
Exemplo n.º 4
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def Relative_spec(nltespec, ltespec):

    model = array(Spec_Normalize(file_list[i], cont_file[i // 2])).T

    observed = ltespec
    a = file_list[i].split("-")
    b = cont_file[i // 2].split("-")
    # Modelspecfile = ('PHOENIX/%(allspec)s' %{'allspec' : model})
    Arcturusspec = observed

    specgrid = np.arange(3000, 12000, 0.01)

    ModelSpec = model
    Arcturus = Arcturusspec

    ModelSpecFlux = np.interp(specgrid, ModelSpec[:, 0], ModelSpec[:, 1])
    ArcturusFlux = np.interp(specgrid, Arcturus[:, 0], Arcturus[:, 1])

    print "Plotting {} model,  Teff= {}K ".format(a[0], a[1]), "[Fe/H]= -{}".format(a[3][0:3]), "iter=", i

    ModelSpec2 = convolve(ModelSpecFlux, macroturb, 0.01)  # Macroturbulence
    ModelSpec3 = convolve(ModelSpec2, 2, 0.01)  # Spectrograph

    RelativeSpec = 100.0 * (ModelSpec3 - ArcturusFlux) / ArcturusFlux

    Unity = array((specgrid, RelativeSpec)).T

    Unity2 = Unity[(Unity[:, 0] <= 7300)]

    SpecSigma = np.std(Unity2[:, 1])
    SpecMean = np.mean(Unity[:, 1])
    print "Spectrum Mean= ", SpecMean
    print "Standard Deviation= ", SpecSigma

    plt.plot(Unity2[:, 0], Unity2[:, 1], label="[Teff] = {}K, model={}, cTeff= {}K".format(a[1], a[0], b[1]))
    # plt.ylim(-100,1000)
    plt.xlim(linecentre - dx, linecentre + dx)
    plt.grid(True)
    plt.legend()
    plt.ylabel("$(F_{NLTE} - F_{OBS})/F_{OBS}$ (%)")
    plt.xlabel("Wavelength, ($\AA$)")
    plt.title("Relative Spectrum Differences \n Between Model and Observed Spectra for Arcturus \n ")

    return RelativeSpec
Exemplo n.º 5
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def regular_spectrum_graph(specfile,continuum):

    


    allspec = ('%(allspec)s' %{'allspec' : specfile})    
    contspec = ('%(cont)s' %{'cont' : continuum})

    scalefactor = [0.995,1.02,0.997,1.02,0.997,1.02]   
    a = specfile.split('-')   

    #Calls in the file from the directory
    spectrum = load_spec(allspec,'PHOENIX')
    conspec = load_spec(contspec, 'PHOENIXcont')    


    newgrid = np.arange(3000,12000,0.01)

    conspecflux = np.interp(newgrid, conspec[:,0], conspec[:,1])
    specflux = np.interp(newgrid, spectrum[:,0], spectrum[:,1])
    macroturb = 6
    spectrograph = 2
    conspecflux2 = convolve(conspecflux, macroturb,0.01)     #Macroturbulence
    conspecflux3 = convolve(conspecflux2, spectrograph,0.01)   #Spectrograph resolution
    
    specflux2 = convolve(specflux, FWHM,0.01)
    specflux3 = convolve(specflux2, FWHM2, 0.01)

    divflux = specflux3/conspecflux3

    plt.title('Observed Arcturus Spectrum \n With 4250K Alpha enhanced model comparison \n Smoothed by convolution with gaussian curve FWHM = 5/150 Angstroms')
    plt.xlabel('Wavelength ($\AA$)')
    plt.ylabel('Normalized Flux (unitless)')
    plt.grid(True)
    plt.plot(newgrid, divflux/scalefactor[i], label = '%(type)s, $T_{eff}$ = %(metal)sK'   %{ 'type'  :a[0], 'metal' :a[1]})
    plt.xlim(7149,7150.8)
    plt.legend()
Exemplo n.º 6
0
def Spec_Graph():
    
    
    allspec2 = ('PHOENIX/%(allspec)s' %{'allspec' : file_list[2*i]})   #nlte Spectrum
    allspec1 = ('PHOENIX/%(allspec)s' %{'allspec' : file_list[2*i +1]}) #lte Spectrum
    
    g = file_list[2*i].split('-')    
    
    Spec1 = np.genfromtxt(allspec1, dtype ='str', usecols = (0,1))
    DtoE(Spec1[:,0])
    DtoE(Spec1[:,1])
    Spec1 = np.array(Spec1, dtype = float)
    
    Spec2 = np.genfromtxt(allspec2, dtype = 'str', usecols = (0,1))
    DtoE(Spec2[:,0])
    DtoE(Spec2[:,1])
    Spec2 = np.array(Spec2, dtype = float)
    
    Spec1[:,1] = Spec1[:,1][np.argsort(Spec1[:,0])]
    Spec1[:,0] = np.sort(Spec1[:,0])
    Spec2[:,1] = Spec2[:,1][np.argsort(Spec2[:,0])]
    Spec2[:,0] = np.sort(Spec2[:,0])
    
    Spec1[:,1] = 10**Spec1[:,1]
    Spec2[:,1] = 10**Spec2[:,1]
    
    newgrid = np.arange(3000,12000, 0.01)   #Uniform grid space for each spectra
    
    NewSpec1 = np.interp(newgrid, Spec1[:,0], Spec1[:,1])
    NewSpec2 = np.interp(newgrid, Spec2[:,0], Spec2[:,1])
    
    

    ##### Fast Fourier Transform convolution function #####
    FWHM = 0.15
    smooth1 = convolve(NewSpec1,FWHM)
    smooth2 = convolve(NewSpec2,FWHM)

       

    RelativeSpectrum = ( (smooth1 - smooth2)/smooth2 ) * 100.  #Relative fluxes as a percent

    SpecAvg = np.mean(RelativeSpectrum)
    SpecSigma = np.std(RelativeSpectrum)
    #top lines
    
    plt.hlines(SpecAvg + SpecSigma, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 1.0)
    plt.hlines(SpecAvg - SpecSigma, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 1.0)
    plt.hlines(SpecAvg, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 2.0)    
    
    SmoothedSpec = np.array([newgrid, RelativeSpectrum], dtype= float)    
    SmoothedSpec = SmoothedSpec.T
        


    SpecFeatures = list()
    for q in range(0,len(SmoothedSpec)):
        if (SmoothedSpec[q,1] >= SpecAvg + SpecSigma) or (SmoothedSpec[q,1] <= SpecAvg - SpecSigma):
            SpecFeatures.append([SmoothedSpec[q,0],SmoothedSpec[q,1]])
        
    SpecFeatures = np.array(SpecFeatures, dtype=float)







    ##### This finds where the important lines are located on the convolved relative spectrum.   
    nothing = []   # Temporary list that is not useful after plotting
    for m in range(0,len(Linelist)):
        
        a = Linelist['wavelength'][m] - 0.005
        b = Linelist['wavelength'][m] + 0.005
        linefile = SmoothedSpec[:,0]
        nothing = np.append(nothing, np.where((linefile >= a) & (linefile <= b)))
    
        
    ##### Array made from y-value at line wavelength on each spectrum.   
    arrowlines = []
    for n in range(0,len(nothing)):
        #arrowlines.append([Linelist['wavelength'][n], SmoothedSpec[nothing[n],1], Linelist['element'][n], Linelist['ion'][n]])
        arrowlines.append([Linelist['wavelength'][n], SmoothedSpec[nothing[n],1]])

    #arrowlines = np.array(arrowlines, dtype= ([('wavelength','f8'),  ('percent','f8'),  ('element','a2'),  ('ion','a2') ]))
    arrowlines = np.array(arrowlines, dtype= float)    
    arrowlines[:,1] = arrowlines[:,1][np.argsort(arrowlines[:,0])]
    arrowlines[:,0] = np.sort(arrowlines[:,0])
    
    
    #plt.plot(arrowlines[:,0], arrowlines[:,1], c= colourstring[i], linewidth= 2.0, 
     #                          label = ' Fe/H = -%(fehs)s ' %{'fehs' : g[3][0:3]}  )
    
    plt.scatter(arrowlines[:,0], arrowlines[:,1], c=colourstring[i])
    
    
    if (g[3][0:3] == '0.5'):
        for r in range(len(Linelist)):
            #if (arrowlines[r,1] >= 10.):
            plt.annotate('%(element)s - %(ion)s, %(wave)s'  
                          %{ 'element' : Linelist['element'][r], 
                                 'ion' : Linelist['ion'][r], 
                                'wave' : Linelist['wavelength'][r]  }  , 
                         xy=(Linelist['wavelength'][r], SmoothedSpec[nothing[r],1]), 
                         xytext=(Linelist['wavelength'][r], SmoothedSpec[nothing[r],1] + 3 ),
                         arrowprops=dict(facecolor='black',arrowstyle ='->'))
                   
                   
    
    '''
    for s in range(len(stronglines)):
        plt.annotate(atomlist[s] + ', {}'.format(stronglines[s,0]) , 
                     xy=(stronglines[s,0], 0), 
                     xytext=(stronglines[s,0],80),
                     arrowprops=dict(facecolor='black', arrowstyle= '->'))
    '''                      
   


    
    plt.title('Locations of the Important Spectral Lines and the Changes due to NLTE Effects'
                           '\n  $T_{eff}$ = %(teff)sK '
                           '\n %(fwhm)s$\AA$ Convolution'
                           %{ 'teff' : g[1]  , 'fwhm': FWHM})    
    plt.grid(True)
    plt.ylabel('$(F_{nlte} - F_{lte})/F_{lte}$ * 100%')
    plt.xlabel('Wavelength ($\AA$)')
    
    
    #Overplotting the locations of important spectral lines in the spectral range.
    #for j in range(len(Linelist)):
    #    plt.annotate('%(element)s - %(ion)s'  %{ 'element' : Linelist['element'][j], 'ion' : Linelist['ion'][j]  }  , 
    #                 xy=(Linelist['wavelength'][j], -10), 
    #                 xytext=(Linelist['wavelength'][j], 80),
    #                 arrowprops=dict(facecolor='red', headwidth = 0, linewidth = 0)
    #            )
                
                
    plt.fill_between(newgrid,y1=SpecAvg + SpecSigma, y2 = SpecAvg-SpecSigma,color = 'y')            
    plt.plot(newgrid, RelativeSpectrum, c= colourstring[i], label = ' Fe/H = -%(fehs)s ' %{'fehs' : g[3][0:3]}, linewidth = 2.0)
    
    plt.scatter(SpecFeatures[:,0], SpecFeatures[:,1], c = 'r')
    #plt.plot(SpecFeatures[:,0], SpecFeatures[:,1], c = 'b', label = 'Significant lines')
    plt.legend()
    plt.xlim(3000, 9000)
    
    return array(SpecFeatures), array(arrowlines)
Exemplo n.º 7
0
def Relative_spec(nltespec, ltespec):
        
    '''
            FUNCTION CURRENTLY DOES NOT WORK PROPERLY!!! 
            THIS IS AN ARTIFACT OF ME CREATING THE .norm.7 FILES
            TO INCREASE PROGRAM SPEED.


    '''        
        
        
        
    model = array(Spec_Normalize(nltespec,ltespec)).T
    

    a = nltespec.split('-')
    #b = ltespec.split('-')
    #Modelspecfile = ('PHOENIX/%(allspec)s' %{'allspec' : model}) 
    Arcturusspec = ltespec
    
    specgrid =np.arange(3000,12000,0.01)    
    
    ModelSpec = model
    Arcturus = Arcturusspec

    ModelSpecFlux = np.interp(specgrid, ModelSpec[:,0], ModelSpec[:,1])
    ArcturusFlux  = np.interp(specgrid, Arcturus[:,0]  , Arcturus[:,1])
    
    
        
    print 'Plotting {} model,  Teff= {}K '.format(a[0],a[1]), '[Fe/H]= -{}'.format(a[3][0:3])  ,'iter=', i
    
    
    
    ModelSpec2 = convolve(ModelSpecFlux, macroturb , 0.01) #Macroturbulence
    ModelSpec3 = convolve(ModelSpec2,    2 , 0.01)    #Spectrograph

    RelativeSpec = 100.*(ModelSpec3 - ArcturusFlux)/ArcturusFlux

    Unity = array((specgrid, RelativeSpec )).T
    
    Unity2 = Unity[(Unity[:,0] <= 7300 )]    
    
    
    
    SpecSigma = np.std(Unity2[:,1])       
    SpecMean = np.mean(Unity[:,1])
    print 'Spectrum Mean= ',SpecMean
    print 'Standard Deviation= ',SpecSigma      
    
    
    plt.plot(Unity2[:,0], Unity2[:,1], label = '[Teff] = {}K, model={}, cTeff= {}K'.format(a[1],a[0],b[1]))
    #plt.ylim(-100,1000)
    plt.xlim(linecentre - dx, linecentre + dx)
    plt.grid(True)
    plt.legend()
    plt.ylabel('$(F_{NLTE} - F_{OBS})/F_{OBS}$ (%)')
    plt.xlabel('Wavelength, ($\AA$)')
    plt.title('Relative Spectrum Differences \n Between Model and Observed Spectra for Arcturus \n ')
  

    return RelativeSpec
Exemplo n.º 8
0
def Spec_Graph(spectra):

    allspec1 = ('%(allspec)s' % {'allspec': spectra[1]})  #nlte Spectrum
    allspec2 = ('%(allspec)s' % {'allspec': spectra[0]})  #lte Spectrum

    g = allspec1.split('-')
    gg = allspec2.split('-')

    print 'plotting F_{} - F_{} / F{} relative difference.'.format(
        g[0], gg[0], gg[0])

    Spec1 = load_spec(allspec1, 'PHOENIX')
    Spec2 = load_spec(allspec2, 'PHOENIX')

    newgrid = np.arange(3000, 12000,
                        0.01)  #Uniform grid space for each spectra

    NewSpec1 = np.interp(newgrid, Spec1[:, 0], Spec1[:, 1])
    NewSpec2 = np.interp(newgrid, Spec2[:, 0], Spec2[:, 1])

    ##### Fast Fourier Transform convolution function #####
    FWHM = 0.015
    smooth1 = convolve(NewSpec1, FWHM, 0.01)
    smooth2 = convolve(NewSpec2, FWHM, 0.01)

    RelativeSpectrum = (
        (smooth1 - smooth2) / smooth2) * 100.  #Relative fluxes as a percent

    SpecAvg = np.mean(RelativeSpectrum)
    SpecSigma = np.std(RelativeSpectrum)
    #top lines

    #plt.hlines(SpecAvg + SpecSigma, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 1.0)
    #plt.hlines(SpecAvg - SpecSigma, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 1.0)
    #plt.hlines(SpecAvg, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 2.0)

    SmoothedSpec = np.array([newgrid, RelativeSpectrum], dtype=float)
    SmoothedSpec = SmoothedSpec.T

    SpecFeatures = list()
    for q in range(0, len(SmoothedSpec)):
        if (SmoothedSpec[q, 1] >= SpecAvg + SpecSigma) or (
                SmoothedSpec[q, 1] <= SpecAvg - SpecSigma):
            SpecFeatures.append([SmoothedSpec[q, 0], SmoothedSpec[q, 1]])

    SpecFeatures = np.array(SpecFeatures, dtype=float)

    ##### This finds where the important lines are located on the convolved relative spectrum.
    nothing = []  # Temporary list that is not useful after plotting
    for m in range(0, len(Linelist)):

        a = Linelist['wavelength'][m] - 0.005
        b = Linelist['wavelength'][m] + 0.005
        linefile = SmoothedSpec[:, 0]
        nothing = np.append(nothing,
                            np.where((linefile >= a) & (linefile <= b)))

    ##### Array made from y-value at line wavelength on each spectrum.
    arrowlines = []
    for n in range(0, len(nothing)):
        #arrowlines.append([Linelist['wavelength'][n], SmoothedSpec[nothing[n],1], Linelist['element'][n], Linelist['ion'][n]])
        arrowlines.append(
            [Linelist['wavelength'][n], SmoothedSpec[nothing[n], 1]])

    #arrowlines = np.array(arrowlines, dtype= ([('wavelength','f8'),  ('percent','f8'),  ('element','a2'),  ('ion','a2') ]))
    arrowlines = np.array(arrowlines, dtype=float)
    arrowlines[:, 1] = arrowlines[:, 1][np.argsort(arrowlines[:, 0])]
    arrowlines[:, 0] = np.sort(arrowlines[:, 0])

    #plt.plot(arrowlines[:,0], arrowlines[:,1], c= colourstring[i], linewidth= 2.0,
    #                           label = ' Fe/H = -%(fehs)s ' %{'fehs' : g[3][0:3]}  )

    #plt.scatter(arrowlines[:,0], arrowlines[:,1], c=colourstring[i])
    '''
    if (g[3][0:3] == '0.5'):
        for r in range(len(Linelist)):
            #if (arrowlines[r,1] >= 10.):
            plt.annotate('%(element)s - %(ion)s, %(wave)s'  
                          %{ 'element' : Linelist['element'][r], 
                                 'ion' : Linelist['ion'][r], 
                                'wave' : Linelist['wavelength'][r]  }  , 
                         xy=(Linelist['wavelength'][r], SmoothedSpec[nothing[r],1]), 
                         xytext=(Linelist['wavelength'][r], SmoothedSpec[nothing[r],1] + 60 ),
                         arrowprops=dict(facecolor='black',arrowstyle ='->'))
                   
    '''
    '''
    for s in range(len(stronglines)):
        plt.annotate(atomlist[s] + ', {}'.format(stronglines[s,0]) , 
                     xy=(stronglines[s,0], 0), 
                     xytext=(stronglines[s,0],80),
                     arrowprops=dict(facecolor='black', arrowstyle= '->'))
    '''

    plt.title('Teff = {}K ' ' {}$\AA$ Convolution'.format(g[1], FWHM))
    plt.grid(True)
    plt.ylabel('Relative Flux (%)')
    plt.xlabel('Wavelength ($\AA$)')

    #Overplotting the locations of important spectral lines in the spectral range.
    '''
    for j in range(len(Linelist)):
        plt.annotate('%(element)s - %(ion)s'  %{ 'element' : Linelist['element'][j], 'ion' : Linelist['ion'][j]  }  , 
                     xy=(Linelist['wavelength'][j], -10), 
                     xytext=(Linelist['wavelength'][j], 80),
                     arrowprops=dict(facecolor='black', headwidth = 0, linewidth = 0)
                )
    '''

    #plt.fill_between(newgrid,y1=SpecAvg + SpecSigma, y2 = SpecAvg-SpecSigma,color = 'y')
    plt.plot(newgrid,
             RelativeSpectrum,
             c=colourstring[i],
             label=' Fe/H = -%(fehs)s ' % {'fehs': g[3][0:3]},
             linewidth=2.0)

    #plt.scatter(SpecFeatures[:,0], SpecFeatures[:,1], c = 'r')
    #plt.plot(SpecFeatures[:,0], SpecFeatures[:,1], label = 'Significant lines')
    plt.legend()
    plt.xlim(3000, 9000)

    return array(SpecFeatures), array(arrowlines)
Exemplo n.º 9
0
def Spec_Graph(spectra):
    
    
    allspec1 = ('%(allspec)s' %{'allspec' : spectra[1]})   #nlte Spectrum
    allspec2 = ('%(allspec)s' %{'allspec' : spectra[0]})   #lte Spectrum
    
    g = allspec1.split('-')    
    gg = allspec2.split('-')
    
    print 'plotting F_{} - F_{} / F{} relative difference.'.format(g[0],gg[0],gg[0])    
    
    
    
    Spec1 = load_spec(allspec1,'PHOENIX')
    Spec2 = load_spec(allspec2,'PHOENIX')

    
    newgrid = np.arange(3000,12000, 0.01)   #Uniform grid space for each spectra
    
    NewSpec1 = np.interp(newgrid, Spec1[:,0], Spec1[:,1])
    NewSpec2 = np.interp(newgrid, Spec2[:,0], Spec2[:,1])
    
    

    ##### Fast Fourier Transform convolution function #####
    FWHM = 0.015
    smooth1 = convolve(NewSpec1,FWHM,0.01)
    smooth2 = convolve(NewSpec2,FWHM,0.01)

       

    RelativeSpectrum = ( (smooth1 - smooth2)/smooth2 ) * 100.  #Relative fluxes as a percent

    SpecAvg = np.mean(RelativeSpectrum)
    SpecSigma = np.std(RelativeSpectrum)
    #top lines
    
    #plt.hlines(SpecAvg + SpecSigma, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 1.0)
    #plt.hlines(SpecAvg - SpecSigma, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 1.0)
    #plt.hlines(SpecAvg, 3000,9000, linestyle = '--', colors = colourstring[i], lw = 2.0)    
    
    SmoothedSpec = np.array([newgrid, RelativeSpectrum], dtype= float)    
    SmoothedSpec = SmoothedSpec.T
        
    

    SpecFeatures = list()
    for q in range(0,len(SmoothedSpec)):
        if (SmoothedSpec[q,1] >= SpecAvg + SpecSigma) or (SmoothedSpec[q,1] <= SpecAvg - SpecSigma):
            SpecFeatures.append([SmoothedSpec[q,0],SmoothedSpec[q,1]])
        
    SpecFeatures = np.array(SpecFeatures, dtype=float)







    ##### This finds where the important lines are located on the convolved relative spectrum.   
    nothing = []   # Temporary list that is not useful after plotting
    for m in range(0,len(Linelist)):
        
        a = Linelist['wavelength'][m] - 0.005
        b = Linelist['wavelength'][m] + 0.005
        linefile = SmoothedSpec[:,0]
        nothing = np.append(nothing, np.where((linefile >= a) & (linefile <= b)))
    
        
    ##### Array made from y-value at line wavelength on each spectrum.   
    arrowlines = []
    for n in range(0,len(nothing)):
        #arrowlines.append([Linelist['wavelength'][n], SmoothedSpec[nothing[n],1], Linelist['element'][n], Linelist['ion'][n]])
        arrowlines.append([Linelist['wavelength'][n], SmoothedSpec[nothing[n],1]])

    #arrowlines = np.array(arrowlines, dtype= ([('wavelength','f8'),  ('percent','f8'),  ('element','a2'),  ('ion','a2') ]))
    arrowlines = np.array(arrowlines, dtype= float)    
    arrowlines[:,1] = arrowlines[:,1][np.argsort(arrowlines[:,0])]
    arrowlines[:,0] = np.sort(arrowlines[:,0])
    
    
    #plt.plot(arrowlines[:,0], arrowlines[:,1], c= colourstring[i], linewidth= 2.0, 
    #                           label = ' Fe/H = -%(fehs)s ' %{'fehs' : g[3][0:3]}  )
    
    #plt.scatter(arrowlines[:,0], arrowlines[:,1], c=colourstring[i])
    
    '''
    if (g[3][0:3] == '0.5'):
        for r in range(len(Linelist)):
            #if (arrowlines[r,1] >= 10.):
            plt.annotate('%(element)s - %(ion)s, %(wave)s'  
                          %{ 'element' : Linelist['element'][r], 
                                 'ion' : Linelist['ion'][r], 
                                'wave' : Linelist['wavelength'][r]  }  , 
                         xy=(Linelist['wavelength'][r], SmoothedSpec[nothing[r],1]), 
                         xytext=(Linelist['wavelength'][r], SmoothedSpec[nothing[r],1] + 60 ),
                         arrowprops=dict(facecolor='black',arrowstyle ='->'))
                   
    '''               
    
    '''
    for s in range(len(stronglines)):
        plt.annotate(atomlist[s] + ', {}'.format(stronglines[s,0]) , 
                     xy=(stronglines[s,0], 0), 
                     xytext=(stronglines[s,0],80),
                     arrowprops=dict(facecolor='black', arrowstyle= '->'))
    '''                      
   


    
    plt.title('Teff = {}K '' {}$\AA$ Convolution'.format(g[1],FWHM))    
    plt.grid(True)
    plt.ylabel('Relative Flux (%)')
    plt.xlabel('Wavelength ($\AA$)')
    
    
    #Overplotting the locations of important spectral lines in the spectral range.
    '''
    for j in range(len(Linelist)):
        plt.annotate('%(element)s - %(ion)s'  %{ 'element' : Linelist['element'][j], 'ion' : Linelist['ion'][j]  }  , 
                     xy=(Linelist['wavelength'][j], -10), 
                     xytext=(Linelist['wavelength'][j], 80),
                     arrowprops=dict(facecolor='black', headwidth = 0, linewidth = 0)
                )
    '''            
                
    #plt.fill_between(newgrid,y1=SpecAvg + SpecSigma, y2 = SpecAvg-SpecSigma,color = 'y')            
    plt.plot(newgrid, RelativeSpectrum, c= colourstring[i], label = ' Fe/H = -%(fehs)s ' %{'fehs' : g[3][0:3]}, linewidth = 2.0)
    
    #plt.scatter(SpecFeatures[:,0], SpecFeatures[:,1], c = 'r')
    #plt.plot(SpecFeatures[:,0], SpecFeatures[:,1], label = 'Significant lines')
    plt.legend()
    plt.xlim(3000, 9000)
    
    return array(SpecFeatures), array(arrowlines)