for i in logg_regions:
if i[0] >= 4500:
master_norm_array = master_norm_array * calculate_chisq_from_input_regions("norm",norm_spectrum,teff_ini,logg_ini,feh_ini,[i])
else:
master_norm_array = master_norm_array * calculate_chisq_from_input_regions("flux",flux_spectrum,teff_ini,logg_ini,feh_ini,[i])
### Apply more weighting to the logg axis by multiply with a logg vector
teff_pos_min,logg_pos_min = spectype_functions.find_2d_max(master_norm_array)
teff_min = teff_space[teff_pos_min]
logg_min = logg_space[logg_pos_min]
### Crop the chisq space immediately surrounding the absolute min
teff_space_cropped,logg_space_cropped,cropped_space =spectype_functions.chop_array(teff_space,logg_space,master_norm_array,teff_min,logg_min,500,1.0)
### Use scipy to fit a least sq 2D gaussian to the cropped region
gauss_fit = spectype_functions.fitgaussian(cropped_space)
gauss_width_logg = gauss_fit[3]
for i in range(len(master_norm_array)):
weight = gaussian_function(i,logg_pos_min,gauss_width_logg)
for j in range(len(master_norm_array[i])):
#master_norm_array[i,j] = master_norm_array[i,j]
master_norm_array[i,j] = master_norm_array[i,j]*weight
#master_norm_array[i,j] = weight
#master_norm_array[i,j] = max(master_norm_array[i])
# plt.clf()
# plt.contourf(teff_space,logg_space,master_norm_array,20,cmap=plt.get_cmap("jet"))
# plt.scatter(teff_min,logg_min,s=200,color="r",marker="x")
# plt.xlabel("T_eff")
# plt.ylabel("logg")
def loop_teff_logg(data_type,data_spectrum,teff,logg,feh,start_lambda,end_lambda):
teff_space = []
logg_space = []
chisq_space = []
teff_min = teff - 1000
teff_max = teff + 1000
if teff < 4500:
teff_min = int(3500)
if teff > 8000:
teff_max = int(9000)
shift = find_shift(data_type,data_spectrum,teff,logg,feh,start_lambda,end_lambda)
### Create grid
teff_i = teff_min
while teff_i <= teff_max:
teff_space.append(teff_i)
teff_i = teff_i + 250
logg_i = 0.0
while logg_i <= 5.0:
logg_space.append(logg_i)
logg_i = logg_i + 0.5
teff_space = array(teff_space)
logg_space = array(logg_space)
(X,Y) = meshgrid(teff_space,logg_space)
### Create chisq array
teff_i = teff_min
while teff_i <= teff_max:
logg_line = []
logg_i = 0.0
while logg_i <= 5.0:
chisq_i = test_template(data_type,data_spectrum,teff_i,logg_i,0.0,start_lambda,end_lambda,shift)
logg_line.append(chisq_i)
logg_i = logg_i + 0.5
chisq_space.append(logg_line)
teff_i = teff_i + 250
chisq_space = array(chisq_space)
chisq_space = transpose(chisq_space)
# chisq_space = spectype_functions.normalise_array(chisq_space)
# chisq_space = log(chisq_space)
### Find min
teff_min,logg_min = spectype_functions.find_2d_min(chisq_space)
teff_min = teff_space[teff_min]
logg_min = logg_space[logg_min]
# ### Normalise the array
#chisq_space = exp(- chisq_space **2 / 2)
#chisq_space = spectype_functions.normalise_array(chisq_space)
# print chisq_space
### Crop the chisq space immediately surrounding the absolute min
teff_space_cropped,logg_space_cropped,cropped_space =spectype_functions.chop_array(teff_space,logg_space,chisq_space,teff_min,logg_min,500,1.0)
#cropped_space = log(cropped_space)
cropped_space = -1 *(cropped_space - cropped_space.max())
### Use scipy to fit a least sq 2D gaussian to the cropped region
gauss_fit = spectype_functions.fitgaussian(cropped_space)
gauss_height = gauss_fit[0]
gauss_width_x = gauss_fit[3]
gauss_width_y = gauss_fit[4]
### Check if the gaussian fit makes sense
if gauss_height > 100 or gauss_width_x > 20 or gauss_width_y > 20:
gauss_height = 0.00001
gauss_width_x = 99999.
gauss_width_y = 99999.
# plt.clf()
# plt.contourf(teff_space,logg_space,chisq_space,20,cmap=plt.get_cmap("jet"))
# plt.scatter(teff_min,logg_min,s=50,color="r",marker="x")
# plt.xlabel("T_eff")
# plt.ylabel("logg")
# plt.xlim(max(teff_space),min(teff_space))
# plt.ylim(max(logg_space),min(logg_space))
# plt.title(object_name +" " + str(start_lambda) + "-" + str(end_lambda) + "A, Teff=" + str(teff_min) + " logg=" + str(logg_min))
# plt.show()
return teff_space,logg_space,chisq_space,gauss_height,gauss_width_x,gauss_width_y
def plot_spectrum(rms_data,input_spectrum):
print "Plotting ",input_spectrum
rms_data = functions.read_ascii(rms_data)
rms_data = functions.read_table(rms_data)
rms_data = transpose(rms_data)
### Find min
for i in range(len(rms_data[0])):
if rms_data[3][i] == min(rms_data[3]):
teff_min = rms_data[0][i]
logg_min = rms_data[1][i]
feh_min = rms_data[2][i]
break
print teff_min,logg_min,feh_min,min(rms_data[3])
teff_list = []
logg_list = []
rms_list = []
for i in range(len(rms_data[0])):
if rms_data[2][i] == feh_min:
teff_list.append(rms_data[0][i])
logg_list.append(rms_data[1][i])
rms_list.append(rms_data[3][i])
### Create 2D space
teff_space = arange(min(teff_list),max(teff_list)+250,250)
logg_space = arange(min(logg_list),max(logg_list)+0.5,0.5)
rms_space = zeros([len(teff_space),len(logg_space)])
for i in range(len(rms_list)):
x_index = int((teff_list[i] - min(teff_list)) / 250.)
y_index = int((logg_list[i] - min(logg_list)) / 0.5)
rms_space[x_index,y_index] = rms_list[i]
### Crop 2D space to perform gaussian fit for min
teff_space_cropped,logg_space_cropped,rms_space_cropped=spectype_functions.chop_array(teff_space,logg_space,transpose(rms_space),teff_min,logg_min,250,0.5)
rms_space_cropped = -1*(rms_space_cropped - rms_space_cropped.max())
print rms_space_cropped
try:
gauss_fit = spectype_functions.fitgaussian(rms_space_cropped)
teff_min_fit = min(teff_space_cropped) + gauss_fit[2] * 250
logg_min_fit = min(logg_space_cropped) + gauss_fit[1] * 0.5
except TypeError:
print "Bad gaussian fit, using abs min"
teff_min_fit = teff_min
logg_min_fit = logg_min
if teff_min_fit < 3500:
teff_min_fit = 3500
if teff_min_fit > 9000:
teff_min_fit = 9000
if logg_min_fit < 0.0:
logg_min_fit = 0.0
if logg_min_fit > 5.0:
logg_min_fit = 5.0
teff_min = int(spectype_functions.round_value(teff_min_fit,250.))
logg_min = spectype_functions.round_value(logg_min_fit,0.5)
print teff_min,logg_min
### Plot teff_logg space
plt.figure(figsize=(7,5))
plt.subplot(211)
plt.title(object_name+" "+file_name+" "+str(int(round(teff_min_fit,0)))+" "+str(round(logg_min_fit,1))+" "+str(feh_min)+" \n RMS="+str(round(min(rms_data[3]),4)))
v_min = min(rms_list)
v_max = min(rms_list)+((max(rms_list)-min(rms_list))/3.)
#v_max = max(rms_list)
rms_space = clip(rms_space,v_min,v_max)
cm = matplotlib.cm.get_cmap('jet')
sc = plt.contourf(teff_space,logg_space,transpose(rms_space),100,cmap=cm)
#sc = plt.scatter(teff_list, logg_list, c=rms_list, vmin=min(rms_list), vmax=(max(rms_list)-min(rms_list))/3+min(rms_list), s=150, cmap=cm,edgecolor="w")
cbar = plt.colorbar(sc)
cbar.ax.set_ylabel("RMS")
plt.scatter(teff_min_fit,logg_min_fit,color="r",s=70,marker="+")
spectype_functions.plot_isochrones(program_dir,"r-",1)
plt.xlim(max(teff_list),min(teff_list))
plt.ylim(max(logg_list),min(logg_list))
#plt.xlim(max(teff_list)+250,min(teff_list)-250)
#plt.ylim(max(logg_list)+.25,min(logg_list)-0.25)
plt.xlabel("Teff (K)")
plt.ylabel("Logg")
### Plot spectrum
plt.subplot(212)
data_spectrum = functions.read_ascii(input_spectrum)
data_spectrum = functions.read_table(data_spectrum)
data_spectrum = transpose(array(data_spectrum))
data_spectrum = spectype_functions.normalise(data_spectrum,flux_normalise_w1,flux_normalise_w2)
template_spectrum = "template_" + str(int(teff_min)) + "_" + str(logg_min) + "_" + str(feh_min)+".dat"
template_spectrum = functions.read_ascii(model_path_flux+template_spectrum)
template_spectrum = functions.read_table(template_spectrum)
template_spectrum = transpose(array(template_spectrum))
template_spectrum = spectype_functions.normalise(template_spectrum,flux_normalise_w1,flux_normalise_w2)
data_wave = data_spectrum[0]
data_flux = data_spectrum[1]
template_wave = template_spectrum[0]
template_flux = template_spectrum[1]
c = 3.0 * 10**5
data_wave = data_wave / ((vel_shift / c) + 1)
data_interp = interpolate.splrep(data_wave,data_flux,s=0)
data_flux = interpolate.splev(master_flux_wave,data_interp,der=0)
template_interp = interpolate.splrep(template_wave,template_flux,s=0)
template_flux = interpolate.splev(master_flux_wave,template_interp,der=0)
plt.plot(master_flux_wave,data_flux,"b-",label="data")
plt.plot(master_flux_wave,template_flux,"g-",label="template")
plt.xlim(3600,5800)
ylim_range = max(template_flux)-min(template_flux)
plt.ylim(min(template_flux)-ylim_range*0.2,max(template_flux)+ylim_range*0.2)
plt.legend(loc="lower right",ncol=2)
plt.xlabel("Wavelength (A)")
plt.ylabel("Normalised flux")
os.system("rm "+file_path_reduced+"spectype_plots/"+object_name+"_"+file_name+".pdf")
plt.savefig(file_path_reduced+"spectype_plots/"+object_name+"_"+file_name+".pdf")
#plt.show()
return teff_min_fit,logg_min_fit,feh_min