def main():
"""Visually test the addition of Noise using add_noise function."""
org_flux = np.ones(500)
for i, snr in enumerate([50, 100, 200, 300, 50000]):
# Test that the standard deviation of the noise is close to the snr level
print("Applying a snr of {}".format(snr))
noisey_flux = add_noise(org_flux, snr)
spec = Spectrum(
flux=copy.copy(org_flux)) # Copy becasue org_flux is mutable.
spec.add_noise(snr)
std = np.std(noisey_flux)
print("Standard deviation of signal = {}".format(std))
snr_est = 1 / std
snr_spectrum = 1. / np.std(spec.flux)
print(
"Estimated SNR from stddev = {}".format(snr_est))
print("Estimated SNR from stddev of Spectrum class = {}".format(
snr_spectrum))
plt.plot(noisey_flux + 0.1 * i, label="snr={}".format(snr))
plt.plot(spec.flux + 0.1 * i,
"--",
label="Spectrum snr={}".format(snr))
# Calculate chisqr from one
chi2 = np.sum((noisey_flux - 1)**2 / 1**2)
print("Chisqr for SNR {} = \t\t{}".format(snr, chi2))
chi2_spectrum = np.sum((spec.flux - 1)**2 / 1**2)
print("Chisqr for snr_spectrum {} = \t\t{}".format(snr, chi2_spectrum))
plt.legend()
plt.show()
def load_spectrum(name, corrected=True):
"""Load in fits file and return as a Spectrum object.
Parameters
----------
name: str
Filename of spectrum.
corrected: bool
Use telluric corrected spectra. Default = True.
Returns
-------
spectrum: Spectrum
Spectra loaded into a Spectrum object.
"""
data = fits.getdata(name)
hdr = fits.getheader(name)
# Turn into Spectrum
# Check for telluric corrected column
if corrected:
spectrum = Spectrum(xaxis=data["wavelength"],
flux=data["Corrected_DRACS"],
header=hdr)
else:
spectrum = Spectrum(xaxis=data["wavelength"],
flux=data["Extracted_DRACS"],
header=hdr)
return spectrum
def fake_obs(simnum, snr=200, suffix=None, plot=False, mode="iam"):
snr = 200
params1 = [5300, 4.5, 0.0]
params2 = [2500, 4.5, 0.0]
gamma = 5
rv = -3
normalization_limits = [2100, 2180]
mod1_spec = load_starfish_spectrum(params1,
limits=normalization_limits,
hdr=True,
normalize=False,
area_scale=True,
flux_rescale=True)
mod2_spec = load_starfish_spectrum(params2,
limits=normalization_limits,
hdr=True,
normalize=False,
area_scale=True,
flux_rescale=True)
if broadcast:
broadcast_result = inherent_alpha_model(mod1_spec.xaxis,
mod1_spec.flux,
mod2_spec.flux,
rvs=rv,
gammas=gamma)
broadcast_values = broadcast_result(obs_spec.xaxis)
result_spectrum = Spectrum(flux=broadcast_values,
xaxis=mod1_spec.xaxis)
else:
# Manually redo the join
mod2_spec.doppler_shift(rv)
mod_combine = mod1_spec.copy()
mod_combine += mod2_spec
mod_combine.doppler_shift(gamma)
mod_combine.normalize(method="exponential")
mod_combine.interpolate(obs_spec.xaxis)
result_spectrum = mod_combine
# result_spectrum = Spectrum(flux=broadcast_values, xaxis=obs_spec.xaxis)
result_spectrum.add_noise(snr)
# Save as
# Detector limits
dect_limits = [(2112, 2123), (2127, 2137), (2141, 2151), (2155, 2165)]
for ii, dect in enumerate(dect_limits):
spec = result_spectrum.copy()
spec.wav_select(*dect)
spec.resample(1024)
name = "HDsim-{0}_{1}_snr_{2}".format(sim_num, ii, snr)
def join_with_manual_doppler(mod1, mod2, rv, gamma):
mod2 = mod2.copy()
x1, y1 = doppler(mod2.xaxis, mod2.flux, rv)
combine = mod1.copy()
combine += Spectrum(xaxis=x1, flux=y1)
x2, y2 = doppler(combine.xaxis, combine.flux, gamma)
return Spectrum(xaxis=x2, flux=y2)
def test_continuum_alpha(chip):
x = np.linspace(2100, 2180, 100)
model1 = Spectrum(xaxis=x, flux=np.ones(len(x)))
model2 = model1 * 2
alpha = continuum_alpha(model1, model2, chip)
assert np.allclose(alpha, [2])
def join_with_broadcast_spectrum(mod1, mod2, rv, gamma, new_x):
broadcast_result = inherent_alpha_model(mod1.xaxis,
mod1.flux,
mod2.flux,
rvs=rv,
gammas=gamma)
broadcast_values = broadcast_result(new_x)
return Spectrum(flux=broadcast_values.squeeze(), xaxis=new_x)
def load_model_spec(pathwave, specpath, limits=None, normalize=False):
"""Load model spec from given path to file and wavefile."""
w_mod = fits.getdata(pathwave)
w_mod /= 10 # turn into nm
flux = fits.getdata(specpath)
hdr = fits.getheader(specpath)
spec = Spectrum(xaxis=w_mod, flux=flux, header=hdr)
logging.debug(pv("spec.xaxis"))
if limits is not None:
"""Apply wavelength limits with slicing."""
spec.wav_select(*limits)
if normalize:
"""Apply normalization to loaded spectrum."""
if limits is None:
print("Warning! Limits should be given when using normalization")
print("specturm for normalize", spec)
spec = spec_local_norm(spec)
return spec
def __post_init__(self):
self.wavelength = np.asarray(self.wavelength)
self.flux = np.asarray(self.flux)
val_spectroscopy.check_input(self.wavelength, self.flux, self.unit)
if self.unit != Wavelength.AA:
print('Converting the wavelength to Angstrom')
self.wavelength = self.wavelength * self.unit.value['conversion']
if self.unit == Wavelength.ICM:
self.wavelength = self.wavelength[::-1]
self.flux = self.flux[::-1]
self.unit = Wavelength.AA
self.spectrum: Spectrum = Spectrum(self.flux, self.wavelength)
def barycorr_crires_spectrum(spectrum, extra_offset=None):
"""Wrapper to apply barycorr for CRIRES spectra if given a Spectrum object."""
if spectrum.header.get("BARYDONE", False):
warnings.warn("Spectrum already berv corrected")
if (extra_offset is not None) or (extra_offset != 0):
warnings.warn("Only applying the extra offset.")
_, nflux = barycorr_crires(spectrum.xaxis,
spectrum.flux, {},
extra_offset=extra_offset)
else:
warnings.warn("Not changing spectrum.")
return spectrum
else:
_, nflux = barycorr_crires(spectrum.xaxis,
spectrum.flux,
spectrum.header,
extra_offset=extra_offset)
new_spectrum = Spectrum(flux=nflux,
xaxis=spectrum.xaxis,
header=spectrum.header)
new_spectrum.header["BARYDONE"] = True
return new_spectrum
def save_fake_observation(spectrum: Spectrum,
star: str,
sim_num: int,
params1: str,
params2: Optional[str] = None,
gamma: Optional[int] = None,
rv: Optional[int] = None,
noise: None = None,
replace: bool = False,
noplots: bool = False) -> None:
# Detector limits
detector_limits = [(2112, 2123), (2127, 2137), (2141, 2151), (2155, 2165)]
npix = 1024
header = fits.Header.fromkeys({})
for ii, detector in enumerate(detector_limits):
spec = spectrum.copy()
spec.wav_select(*detector)
spec.interpolate1d_to(np.linspace(spec.xaxis[0], spec.xaxis[-1], npix))
if not noplots:
plt.plot(spec.xaxis, spec.flux)
plt.title("Fake spectrum {0} {1} detector {2}".format(
star, sim_num, ii + 1))
plt.show()
name = obs_name_template().format(star, sim_num, ii + 1)
# name = "{0}-{1}-mixavg-tellcorr_{2}.fits".format(star, sim_num, ii + 1)
name = os.path.join(simulators.paths["spectra"], name)
# spec.save...
hdrkeys = [
"OBJECT", "Id_sim", "num", "chip", "snr", "c_gamma", "cor_rv",
"host", "compan"
]
hdrvals = [
star, "Fake simulation data", sim_num, ii + 1, noise, gamma, rv,
params1, params2
]
if os.path.exists(name) and not replace:
print(name, "Already exists")
else:
if os.path.exists(name):
print("Replacing {0}".format(name))
os.remove(name)
export_fits(name, spec.xaxis, spec.flux, header, hdrkeys, hdrvals)
print("Saved fits to {0}".format(name))
def apply_convolution(model_spectrum, R=None, chip_limits=None):
"""Apply convolution to spectrum object."""
if chip_limits is None:
chip_limits = (np.min(model_spectrum.xaxis),
np.max(model_spectrum.xaxis))
if R is None:
return copy.copy(model_spectrum)
else:
ip_xaxis, ip_flux = ip_convolution(model_spectrum.xaxis[:],
model_spectrum.flux[:], chip_limits,
R, fwhm_lim=5.0, plot=False, progbar=True)
new_model = Spectrum(xaxis=ip_xaxis, flux=ip_flux,
calibrated=model_spectrum.calibrated,
header=model_spectrum.header)
return new_model
def load_phoenix_spectrum(phoenix_name, limits=None, normalize=False):
wav_dir = simulators.starfish_grid["raw_path"]
wav_model = fits.getdata(
os.path.join(wav_dir, "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits"))
wav_model /= 10 # turn into nanometers
flux = fits.getdata(phoenix_name)
spec = Spectrum(flux=flux, xaxis=wav_model)
# Limit to K band
spec.wav_select(2070, 2350)
if normalize:
spec = spec_local_norm(spec, method="exponential")
if limits is not None:
spec.wav_select(*limits)
return spec
def load_spectrum(name):
"""Load in fits file and return as a Spectrum object.
Tries multiple names for flux column from past implementations.
Parameters
----------
name: str
Filename of spectrum.
Returns
-------
spectrum: Spectrum
Spectra loaded into a Spectrum object.
"""
data = fits.getdata(name)
hdr = fits.getheader(name)
# TODO: log lambda sampling.
# see starfish
# Turn into Spectrum
xaxis = data["wavelength"]
try:
flux = data["flux"]
except KeyError:
try:
flux = data["Corrected_DRACS"]
except KeyError:
try:
flux = data["Extracted_DRACS"]
except KeyError:
print("The fits columns are {}".format(data.columns))
raise
spectrum = Spectrum(xaxis=xaxis, flux=flux, header=hdr)
return spectrum
def main():
"""Main function."""
star = "HD30501"
host_parameters = load_param_file(star)
obsnum = 1
chip = 1
obs_name = select_observation(star, obsnum, chip)
# Load observation
# uncorrected_spectra = load_spectrum(obs_name)
observed_spectra = load_spectrum(obs_name)
_observed_spectra = barycorr_crires_spectrum(observed_spectra,
extra_offset=None)
observed_spectra.flux /= 1.02
obs_resolution = crires_resolution(observed_spectra.header)
wav_model = fits.getdata(
os.path.join(wav_dir, "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits"))
wav_model /= 10 # turn into nm
logging.debug(__("Phoenix wav_model = {0}", wav_model))
closest_model = phoenix_name_from_params(model_base_dir, host_parameters)
original_model = "Z-0.0/lte05200-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits"
logging.debug(__("closest_model {0}", closest_model))
logging.debug(__("original_model {0}", original_model))
# Function to find the good models I need
models = find_phoenix_model_names(model_base_dir, original_model)
if isinstance(models, list):
logging.debug(__("Number of close models returned {0}", len(models)))
model_chisqr_vals = np.empty_like(models)
model_xcorr_vals = np.empty_like(models)
model_xcorr_rv_vals = np.empty_like(models)
for ii, model_name in enumerate(models):
mod_flux = fits.getdata(model_name)
mod_header = fits.getheader(model_name)
mod_spectrum = Spectrum(xaxis=wav_model,
flux=mod_flux,
header=mod_header,
calibrated=True)
# Normalize Phoenix Spectrum
# mod_spectrum.wav_select(2080, 2200) # limits for simple normalization
mod_spectrum.wav_select(2105, 2165) # limits for simple normalization
# norm_mod_spectrum = simple_normalization(mod_spectrum)
norm_mod_spectrum = spec_local_norm(mod_spectrum, plot=False)
# Wav select
norm_mod_spectrum.wav_select(
np.min(observed_spectra.xaxis) - 5,
np.max(observed_spectra.xaxis) +
5) # +- 5nm of obs for convolution
# Convolve to resolution of instrument
conv_mod_spectrum = convolve_models([norm_mod_spectrum],
obs_resolution,
chip_limits=None)[0]
# Find crosscorrelation RV
# # Should run though all models and find best rv to apply uniformly
rvoffset, cc_max = xcorr_peak(observed_spectra,
conv_mod_spectrum,
plot=False)
# Interpolate to obs
conv_mod_spectrum.spline_interpolate_to(observed_spectra)
# conv_mod_spectrum.interpolate1d_to(observed_spectra)
model_chi_val = chi_squared(observed_spectra.flux,
conv_mod_spectrum.flux)
# argmax = np.argmax(cc_max)
model_chisqr_vals[ii] = model_chi_val
model_xcorr_vals[ii] = cc_max
model_xcorr_rv_vals[ii] = rvoffset
logging.debug(pv("model_chisqr_vals"))
logging.debug(pv("model_xcorr_vals"))
chisqr_argmin_indx = np.argmin(model_chisqr_vals)
xcorr_argmax_indx = np.argmax(model_xcorr_vals)
logging.debug(pv("chisqr_argmin_indx"))
logging.debug(pv("xcorr_argmax_indx"))
logging.debug(pv("model_chisqr_vals"))
print("Minimum Chisqr value =",
model_chisqr_vals[chisqr_argmin_indx]) # , min(model_chisqr_vals)
print("Chisqr at max correlation value",
model_chisqr_vals[chisqr_argmin_indx])
print("model_xcorr_vals = {}".format(model_xcorr_vals))
print("Maximum Xcorr value =",
model_xcorr_vals[xcorr_argmax_indx]) # , max(model_xcorr_vals)
print("Xcorr at min Chiqsr", model_xcorr_vals[chisqr_argmin_indx])
logging.debug(pv("model_xcorr_rv_vals"))
print("RV at max xcorr =", model_xcorr_rv_vals[xcorr_argmax_indx])
# print("Median RV val =", np.median(model_xcorr_rv_vals))
print(pv("model_xcorr_rv_vals[chisqr_argmin_indx]"))
# print(pv("sp.stats.mode(np.around(model_xcorr_rv_vals))"))
print("Max Correlation model = ",
models[xcorr_argmax_indx].split("/")[-2:])
print("Min Chisqr model = ", models[chisqr_argmin_indx].split("/")[-2:])
limits = [2110, 2160]
best_model = models[chisqr_argmin_indx]
best_model_spec = load_phoenix_spectrum(best_model,
limits=limits,
normalize=True)
best_model_spec = convolve_models([best_model_spec],
obs_resolution,
chip_limits=None)[0]
best_xcorr_model = models[xcorr_argmax_indx]
best_xcorr_model_spec = load_phoenix_spectrum(best_xcorr_model,
limits=limits,
normalize=True)
best_xcorr_model_spec = convolve_models([best_xcorr_model_spec],
obs_resolution,
chip_limits=None)[0]
close_model_spec = load_phoenix_spectrum(closest_model[0],
limits=limits,
normalize=True)
close_model_spec = convolve_models([close_model_spec],
obs_resolution,
chip_limits=None)[0]
plt.plot(observed_spectra.xaxis,
observed_spectra.flux,
label="Observations")
plt.plot(best_model_spec.xaxis, best_model_spec.flux, label="Best Model")
plt.plot(best_xcorr_model_spec.xaxis,
best_xcorr_model_spec.flux,
label="Best xcorr Model")
plt.plot(close_model_spec.xaxis,
close_model_spec.flux,
label="Close Model")
plt.legend()
plt.xlim(*limits)
plt.show()
print("After plot")
def main(star,
obsnum,
teff_1,
logg_1,
feh_1,
teff_2,
logg_2,
feh_2,
gamma,
rv,
plot_name=None):
fig, axis = plt.subplots(2, 2, figsize=(15, 8), squeeze=False)
for chip, ax in zip(range(1, 5), axis.flatten()):
# Get observation data
obs_name, params, output_prefix = iam_helper_function(
star, obsnum, chip)
# Load observed spectrum
obs_spec = load_spectrum(obs_name)
# Mask out bad portion of observed spectra
obs_spec = spectrum_masking(obs_spec, star, obsnum, chip)
# Barycentric correct spectrum
_obs_spec = barycorr_crires_spectrum(obs_spec, extra_offset=None)
# Determine Spectrum Errors
# error_off = False
# errors = spectrum_error(star, obsnum, chip, error_off=error_off)
# Create model with given parameters
host = load_starfish_spectrum([teff_1, logg_1, feh_1],
limits=[2110, 2165],
area_scale=True,
hdr=True)
if teff_2 is None:
assert (logg_2 is None) and (feh_2 is None) and (
rv == 0), "All must be None for bhm case."
companion = Spectrum(xaxis=host.xaxis,
flux=np.zeros_like(host.flux))
else:
companion = load_starfish_spectrum([teff_2, logg_2, feh_2],
limits=[2110, 2165],
area_scale=True,
hdr=True)
joint_model = inherent_alpha_model(host.xaxis,
host.flux,
companion.flux,
gammas=gamma,
rvs=rv)
model_spec = Spectrum(xaxis=host.xaxis,
flux=joint_model(host.xaxis).squeeze())
model_spec = model_spec.remove_nans()
model_spec = model_spec.normalize("exponential")
# plot
obs_spec.plot(axis=ax, label="{}-{}".format(star, obsnum))
model_spec.plot(axis=ax, linestyle="--", label="Chi-squared model")
ax.set_xlim([obs_spec.xmin() - 0.5, obs_spec.xmax() + 0.5])
ax.set_title("{} obs {} chip {}".format(star, obsnum, chip))
ax.legend()
plt.tight_layout()
if plot_name is None:
fig.show()
else:
if not (plot_name.endswith(".png") or plot_name.endswith(".pdf")):
raise ValueError("plot_name does not end with .pdf or .png")
fig.savefig(plot_name)
return 0
obs_resolution = crires_resolution(observed_spectra.header)
wav_model = fits.getdata(model_base_dir +
"WAVE_PHOENIX-ACES-AGSS-COND-2011.fits")
wav_model /= 10 # turn into nm
temp_store = []
rv_store = []
cc_store = []
chi2_store = []
for model in tqdm(phoenix_names):
temp_store.append(int(model.split("/")[-1][3:8]))
phoenix_data = fits.getdata(model)
phoenix_spectrum = Spectrum(flux=phoenix_data,
xaxis=wav_model,
calibrated=True)
phoenix_spectrum.wav_select(*wl_limits)
phoenix_spectrum = spec_local_norm(phoenix_spectrum)
phoenix_spectrum = apply_convolution(phoenix_spectrum,
R=obs_resolution,
chip_limits=wl_limits)
rv, cc = observed_spectra.crosscorr_rv(phoenix_spectrum,
rvmin=-100.,
rvmax=100.0,
drv=0.1,
mode='doppler',
skipedge=50)
maxind = np.argmax(cc)
bd_model = "/home/jneal/Phd/data/phoenixmodels/" \
"HD30501b-lte02500-5.00-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits"
star_model = "/home/jneal/Phd/data/phoenixmodels/" \
"HD30501-lte05200-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits"
i_bdmod = fits.getdata(bd_model)
i_star = fits.getdata(star_model)
hdr_bd = fits.getheader(bd_model)
hdr_star = fits.getheader(star_model)
w_mod = fits.getdata(pathwave)
w_mod /= 10 # turn into nm
test_rv = -15.205 # km/s
template_spectrum = Spectrum(xaxis=w_mod, flux=i_star, calibrated=True)
template_spectrum.wav_select(2100, 2200)
obs_spectrum = Spectrum(xaxis=w_mod, flux=i_star, calibrated=True)
obs_spectrum.doppler_shift(test_rv)
obs_spectrum.wav_select(2100, 2200)
print(len(obs_spectrum.xaxis))
rv, cc = pyasl.crosscorrRV(obs_spectrum.xaxis,
obs_spectrum.flux,
template_spectrum.xaxis,
template_spectrum.flux,
rvmin=-60.,
rvmax=60.0,
drv=0.1,
def main(star,
sim_num,
params1=None,
params2=None,
gamma=None,
rv=None,
noise=None,
test=False,
replace=False,
noplots=False,
mode="iam",
fudge=None,
area_scale=True):
star = star.upper()
if gamma is None:
gamma = 0
if rv is None:
rv = 0
if params1 is not None:
params_1 = [float(par) for par in params1.split(",")]
else:
raise ValueError("No host parameter given. Use '-p'")
if mode == "iam":
if params2 is not None:
params_2 = [float(par) for par in params2.split(",")]
else:
raise ValueError(
"No companion parameter given. Use '-q', or set '--mode bhm'")
if test:
testing_noise(star, sim_num, params_1, params_2, gamma, rv)
testing_fake_spectrum(star,
sim_num,
params_1,
params_2,
gamma,
rv,
noise=None)
else:
x_wav, y_wav, header = fake_iam_simulation(None,
params_1,
params_2,
gamma=gamma,
rv=rv,
noise=noise,
header=True,
fudge=fudge,
area_scale=area_scale)
fake_spec = Spectrum(xaxis=x_wav, flux=y_wav, header=header)
# save to file
save_fake_observation(fake_spec,
star,
sim_num,
params1,
params2=params2,
gamma=gamma,
rv=rv,
noise=None,
replace=replace,
noplots=noplots)
elif mode == "bhm":
# Do a bhm simulation
x_wav, y_wav, header = fake_bhm_simulation(None,
params_1,
gamma,
noise=noise,
header=True)
fake_spec = Spectrum(xaxis=x_wav, flux=y_wav, header=header)
# save to file
save_fake_observation(fake_spec,
star,
sim_num,
params1,
gamma=gamma,
noise=None,
replace=replace,
noplots=noplots)
return None
host_temp = 5300
comp_temp = 2300
# Load in some phoenix data and make a simulation
base = simulators.starfish_grid["raw_path"]
phoenix_wl = fits.getdata(
os.path.join(base, "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits")) / 10
host_phoenix = os.path.join(
base, ("Z-0.0/lte{:05d}-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits"
).format(host_temp))
comp_phoenix = os.path.join(
base, ("Z-0.0/lte{:05d}-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits"
).format(comp_temp))
unnorm_host_spec = Spectrum(flux=fits.getdata(host_phoenix), xaxis=phoenix_wl)
unnorm_comp_spec = Spectrum(flux=fits.getdata(comp_phoenix), xaxis=phoenix_wl)
min_wav = 2050
max_wav = 2250
unnorm_host_spec.wav_select(min_wav, max_wav)
unnorm_comp_spec.wav_select(min_wav, max_wav)
# local normalization
norm_host_flux = local_normalization(unnorm_host_spec.xaxis,
unnorm_host_spec.flux,
method="exponential",
plot=False)
norm_comp_flux = local_normalization(unnorm_comp_spec.xaxis,
unnorm_comp_spec.flux,
# In[3]: # Manually load Phoenix spectra #phoenix_path = simulators... phoenix_path = "/home/jneal/Phd/data/PHOENIX-ALL/PHOENIX/" phoenix_1 = "Z-0.0/lte06000-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits" phoenix_2 = "Z-0.0/lte05800-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits" wav = fits.getdata(phoenix_path + "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits") phoenix1 = fits.getdata(phoenix_path + phoenix_1) phoenix2 = fits.getdata(phoenix_path + phoenix_2) spec1 = Spectrum(xaxis=wav/10, flux=phoenix1) spec2 = Spectrum(xaxis=wav/10, flux=phoenix2) spec1.wav_select(2000,2200) spec2.wav_select(2000,2200) spec1.plot(label="1") spec2.plot(label="2") plt.legend() plt.show() # In[4]: from Convolution.IP_multi_Convolution import convolve_spectrum
# In[ ]:
Artucus = [4300, 1.50, -0.5]
HD30501 = [5200, 4.5, 0.0]
ACES_bottom = [2300, 4.5, 0.0]
Sun = [5800, 4.5, 0.0]
# In[ ]:
# Teff 5800, 4.5, 0.0
# comparison_plot("Sun", *Sun)
from spectrum_overload import Spectrum
w_next, f_next, bb_next = load_Allard_Phoenix(
"data/lte580-4.5-0.0a+0.0.BT-NextGen.7")
next_spec = Spectrum(xaxis=w_next, flux=f_next)
w_dusty_spec, f_dusty_spec, bb_dusty_spec = load_Allard_Phoenix(
"data/lte058-4.5-0.0.BT-Dusty.spec.7")
dusty_spec = Spectrum(xaxis=w_dusty_spec, flux=f_dusty_spec)
w_settl, f_settl, bb_settl = load_Allard_Phoenix(
"data/lte058.0-4.5-0.0a+0.0.BT-Settl.spec.7")
settl_spec = Spectrum(xaxis=w_settl, flux=f_settl)
w_cond, f_cond, bb_cond = load_Allard_Phoenix(
"data/lte580-4.5-0.0a+0.0.BT-Cond.7")
cond_spec = Spectrum(xaxis=w_cond, flux=f_cond)
w_aces, f_aces = load_phoenix_aces(
"data/lte05800-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits")
aces_spec = Spectrum(xaxis=w_aces, flux=f_aces)
w_dusty_fits, f_dusty_fits, bb_dusty_fits = load_Allard_Phoenix(
"data/lte5800-4.50-0.0a+0.0.BT-dusty-giant-2013.cf128.sc.spid.fits")
w_dusty_fits = w_dusty_fits * 1000
def compare_spectra(table, params):
"""Plot the min chi2 result against the observations."""
extractor = DBExtractor(table)
gamma_df = extractor.simple_extraction(columns=["gamma"])
extreme_gammas = [min(gamma_df.gamma.values), max(gamma_df.gamma.values)]
for ii, chi2_val in enumerate(chi2_names[0:-2]):
df = extractor.ordered_extraction(
columns=["teff_1", "logg_1", "feh_1", "gamma", chi2_val],
order_by=chi2_val,
limit=1,
asc=True)
params1 = [
df["teff_1"].values[0], df["logg_1"].values[0],
df["feh_1"].values[0]
]
params1 = [float(param1) for param1 in params1]
gamma = df["gamma"].values
obs_name, obs_params, output_prefix = bhm_helper_function(
params["star"], params["obsnum"], ii + 1)
print(obs_name)
obs_spec = load_spectrum(obs_name)
# Mask out bad portion of observed spectra
# obs_spec = spectrum_masking(obs_spec, params["star"], params["obsnum"], ii + 1)
# Barycentric correct spectrum
_obs_spec = barycorr_crires_spectrum(obs_spec, extra_offset=None)
normalization_limits = [obs_spec.xaxis[0] - 5, obs_spec.xaxis[-1] + 5]
# models
# print("params for models", params1)
mod1 = load_starfish_spectrum(params1,
limits=normalization_limits,
hdr=True,
normalize=False,
area_scale=True,
flux_rescale=True)
bhm_grid_func = one_comp_model(mod1.xaxis, mod1.flux, gammas=gamma)
bhm_upper_gamma = one_comp_model(mod1.xaxis,
mod1.flux,
gammas=extreme_gammas[1])
bhm_lower_gamma = one_comp_model(mod1.xaxis,
mod1.flux,
gammas=extreme_gammas[0])
bhm_grid_model = bhm_grid_func(obs_spec.xaxis).squeeze()
bhm_grid_model_full = bhm_grid_func(mod1.xaxis).squeeze()
bhm_upper_gamma = bhm_upper_gamma(obs_spec.xaxis).squeeze()
bhm_lower_gamma = bhm_lower_gamma(obs_spec.xaxis).squeeze()
model_spec_full = Spectrum(flux=bhm_grid_model_full, xaxis=mod1.xaxis)
model_spec = Spectrum(flux=bhm_grid_model, xaxis=obs_spec.xaxis)
bhm_upper_gamma = Spectrum(flux=bhm_upper_gamma, xaxis=obs_spec.xaxis)
bhm_lower_gamma = Spectrum(flux=bhm_lower_gamma, xaxis=obs_spec.xaxis)
model_spec = model_spec.remove_nans()
model_spec = model_spec.normalize(method="exponential")
model_spec_full = model_spec_full.remove_nans()
model_spec_full = model_spec_full.normalize(method="exponential")
bhm_lower_gamma = bhm_lower_gamma.remove_nans()
bhm_lower_gamma = bhm_lower_gamma.normalize(method="exponential")
bhm_upper_gamma = bhm_upper_gamma.remove_nans()
bhm_upper_gamma = bhm_upper_gamma.normalize(method="exponential")
from mingle.utilities.chisqr import chi_squared
chisqr = chi_squared(obs_spec.flux, model_spec.flux)
print("Recomputed chi^2 = {0}".format(chisqr))
print("Database chi^2 = {0}".format(df[chi2_val]))
fig, ax = plt.subplots(1, 1, figsize=(15, 8))
plt.plot(obs_spec.xaxis,
obs_spec.flux + 0.01,
label="0.05 + Observation, {}".format(obs_name))
plt.plot(model_spec.xaxis,
model_spec.flux,
label="Minimum \chi^2 model")
plt.plot(model_spec_full.xaxis,
model_spec_full.flux,
"--",
label="Model_full_res")
plt.plot(bhm_lower_gamma.xaxis,
bhm_lower_gamma.flux,
"-.",
label="gamma={}".format(extreme_gammas[0]))
plt.plot(bhm_upper_gamma.xaxis,
bhm_upper_gamma.flux,
":",
label="gamma={}".format(extreme_gammas[1]))
plt.title("bhm spectrum")
plt.legend()
fig.tight_layout()
name = "{0}-{1}_{2}_{3}_bhm_min_chi2_spectrum_comparison_{4}.png".format(
params["star"], params["obsnum"], params["chip"], chi2_val,
params["suffix"])
plt.savefig(os.path.join(params["path"], "plots", name))
plt.close()
plt.plot(obs_spec.xaxis, obs_spec.flux, label="Observation")
plt.show()
def load_starfish_spectrum(params,
limits=None,
hdr=False,
normalize=False,
area_scale=False,
flux_rescale=False,
wav_scale=True):
"""Load spectrum from hdf5 grid file.
Parameters
----------
params: list
Model parameters [teff, logg, Z]
limits= List[float, float] default=None
Wavelength limits.
hdr: bool
Include the model header. Default False.
normalize: bool
Locally normalize the spectrum. Default False.
area_scale: bool
Multiply by stellar surface area pi*R**2 (towards Earth)
flux_rescale: bool
Convert from /cm to /nm by dividing by 1e7
wav_scale: bool
Multiply by wavelength to turn into [erg/s/cm^2]
Returns
-------
spec: Spectrum
The loaded spectrum as Spectrum object.
"""
my_hdf5 = HDF5Interface()
my_hdf5.wl = my_hdf5.wl / 10 # Turn into Nanometer
if hdr:
flux, myhdr = my_hdf5.load_flux_hdr(np.array(params))
spec = Spectrum(flux=flux, xaxis=my_hdf5.wl, header=myhdr)
else:
flux = my_hdf5.load_flux(np.array(params))
spec = Spectrum(flux=flux, xaxis=my_hdf5.wl)
if flux_rescale:
spec = spec * 1e-7 # convert flux unit from /cm to /nm
if area_scale:
if hdr:
emitting_area = phoenix_area(spec.header)
spec = spec * emitting_area
spec.header["emit_area"] = (emitting_area, "pi*r^2")
else:
raise ValueError("No header provided for stellar area scaling")
if wav_scale:
# Convert into photon counts, (constants ignored)
spec = spec * spec.xaxis
if normalize:
spec = spec_local_norm(spec, method="exponential")
if limits is not None:
if limits[0] > spec.xaxis[-1] or limits[-1] < spec.xaxis[0]:
logging.warning(
"Warning: The wavelength limits do not overlap the spectrum."
"There is no spectrum left... Check your wavelength, or limits."
)
spec.wav_select(*limits)
return spec
raw_flux = fits.getdata(phoenix)
wav = fits.getdata(phoenix_wav)
plt.plot(wav, raw_flux, label="raw")
plt.plot(wl, flux * 5e7, label="starfish")
plt.legend()
plt.show()
params2 = [5200, 4.5, 0.0]
flux = myHDF5.load_flux(np.array(params2))
# Load direct phoenix spectra
path = simulators.starfish_grid["raw_path"]
phoenix = os.path.join(
path, "Z-0.0",
"lte{:05d}-{:0.2f}-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits".format(
params2[0], params2[1]))
phoenix_wav = os.path.join(path, "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits")
print(phoenix)
raw_flux = fits.getdata(phoenix)
wav = fits.getdata(phoenix_wav)
phoenix_spec = Spectrum(xaxis=wav, flux=raw_flux)
phoenix_spec.wav_select(wl[0], wl[-1])
plt.plot(wav, raw_flux, label="raw")
plt.plot(phoenix_spec.xaxis, phoenix_spec.flux, "--", label="spec")
plt.plot(wl, flux * 4e6, label="starfish")
plt.legend()
plt.show()
def compare_spectra(table, params):
"""Plot the min chi2 result against the observations."""
extractor = DBExtractor(table)
for ii, chi2_val in enumerate(chi2_names[0:-2]):
df = extractor.minimum_value_of(chi2_val)
df = df[["teff_1", "logg_1", "feh_1", "gamma",
"teff_2", "logg_2", "feh_2", "rv", chi2_val]]
params1 = [df["teff_1"].values[0], df["logg_1"].values[0], df["feh_1"].values[0]]
params2 = [df["teff_2"].values[0], df["logg_2"].values[0], df["feh_2"].values[0]]
params1 = [float(param1) for param1 in params1]
params2 = [float(param2) for param2 in params2]
gamma = df["gamma"].values
rv = df["rv"].values
from simulators.iam_module import iam_helper_function
obs_name, obs_params, output_prefix = iam_helper_function(params["star"], params["obsnum"], ii + 1)
obs_spec = load_spectrum(obs_name)
# Mask out bad portion of observed spectra
# obs_spec = spectrum_masking(obs_spec, params["star"], params["obsnum"], ii + 1)
# Barycentric correct spectrum
_obs_spec = barycorr_crires_spectrum(obs_spec, extra_offset=None)
normalization_limits = [obs_spec.xaxis[0] - 5, obs_spec.xaxis[-1] + 5]
# models
# print("params for models", params1, params2)
mod1 = load_starfish_spectrum(params1, limits=normalization_limits,
hdr=True, normalize=False, area_scale=True,
flux_rescale=True)
mod2 = load_starfish_spectrum(params2, limits=normalization_limits,
hdr=True, normalize=False, area_scale=True,
flux_rescale=True)
iam_grid_func = inherent_alpha_model(mod1.xaxis, mod1.flux, mod2.flux,
rvs=rv, gammas=gamma)
iam_grid_model = iam_grid_func(obs_spec.xaxis).squeeze()
iam_grid_model_full = iam_grid_func(mod1.xaxis).squeeze()
model_spec_full = Spectrum(flux=iam_grid_model_full, xaxis=mod1.xaxis)
model_spec = Spectrum(flux=iam_grid_model, xaxis=obs_spec.xaxis)
model_spec = model_spec.remove_nans()
model_spec = model_spec.normalize(method="exponential")
model_spec_full = model_spec_full.remove_nans()
model_spec_full = model_spec_full.normalize(method="exponential")
fig, ax = plt.subplots(1, 1)
plt.plot(obs_spec.xaxis, obs_spec.flux, label="Observation")
plt.plot(model_spec.xaxis, model_spec.flux, label="Minimum \chi^2 model")
plt.plot(model_spec_full.xaxis, model_spec_full.flux, "--", label="Model_full_res")
plt.legend()
fig.tight_layout()
name = "{0}-{1}_{2}_{3}_min_chi2_spectrum_comparison_{4}.png".format(
params["star"], params["obsnum"], params["chip"], chi2_val, params["suffix"])
plt.savefig(os.path.join(params["path"], "plots", name))
plt.close()
plt.plot(obs_spec.xaxis, obs_spec.flux, label="Observation")
plt.show()
make_dirs(source_path, output_path) # This is completed now.
folders = glob.glob(os.path.join(source_path, "*"))
phoenix_wave = os.path.join(source_path, "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits")
wave = fits.getdata(phoenix_wave) / 10 # Convert to nm
for folder in folders:
# Now have a specific directory with phoenix fits files.
phoenix_files = glob.glob(os.path.join(folder, "*.fits"))
for f in phoenix_files:
print(f)
# Load in file
spectrum = fits.getdata(f)
# Wavelenght narrow to K band only 2.07, 2.35 micron
phoenix_spectrum = Spectrum(flux=spectrum, xaxis=wave)
phoenix_spectrum.wav_select(*band_limits)
# Convolutions
# Convolution in spectrum overload?
# phoenix_spectrum.convolution(R, ...)
# Save result to fits file in new directory.
new_f = f.replace(".fits", "_R{0:d}k.fits".format(int(resolution / 1000)))
new_f = new_f.replace(source_path, output_path)
print(new_f)
# Load in some phoenix data and make a simulation
path = simulators.starfish_grid["raw_path"]
phoenix_wl = fits.getdata(
os.path.join(path, "WAVE_PHOENIX-ACES-AGSS-COND-2011.fits")) / 10
host_phoenix = os.path.join(
path, "Z-0.0",
"lte{:05d}-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits".format(
host_temp))
comp_phoenix = os.path.join(
path, "Z-0.0",
"lte{:05d}-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits".format(
comp_temp))
unnorm_host_spec = Spectrum(flux=fits.getdata(host_phoenix), xaxis=phoenix_wl)
unnorm_comp_spec = Spectrum(flux=fits.getdata(comp_phoenix), xaxis=phoenix_wl)
# Waveleght limits. The result is sensitive to these limits.
min_wav = 500
max_wav = 3500
unnorm_host_spec.wav_select(min_wav, max_wav)
unnorm_comp_spec.wav_select(min_wav, max_wav)
# Black body from spectrum temp.
norm_host_spec = Spectrum(flux=unnorm_host_spec.flux /
blackbody_lambda(phoenix_wl * u_nm, host_temp),
xaxis=phoenix_wl)
norm_comp_spec = Spectrum(flux=unnorm_comp_spec.flux /
blackbody_lambda(phoenix_wl * u_nm, host_temp),
from astro_scripts.plot_fits import get_wavelength, ccf_astro, vac2air
from loading_phoenix import load_phoenix_aces, load_Allard_Phoenix, align2model
get_ipython().run_line_magic('matplotlib', 'inline')
# # Synthethic HD30501
# Using the models with Teff 5200, 4.5 logg, -0.0 [Fe/H]
#
# HD30501 is in vacuum so will leave the models in vacuum also.
# In[ ]:
w_aces, f_aces = load_phoenix_aces(
"data/lte05200-4.50-0.0.PHOENIX-ACES-AGSS-COND-2011-HiRes.fits")
aces_spec = Spectrum(xaxis=w_aces, flux=f_aces)
w_settl, f_settl, bb_settl = load_Allard_Phoenix(
"data/lte052.0-4.5-0.0a+0.0.BT-Settl.spec.7")
settl_spec = Spectrum(xaxis=w_settl, flux=f_settl)
w_dusty, f_dusty, bb_dusty = load_Allard_Phoenix(
"data/lte052-4.5-0.0.BT-Dusty.spec.7")
dusty_spec = Spectrum(xaxis=w_dusty, flux=f_dusty)
w_next, f_next, bb_next = load_Allard_Phoenix(
"data/lte052-4.5-0.0a+0.0.BT-NextGen.7")
next_spec = Spectrum(xaxis=w_next, flux=f_next)
w_cond, f_cond, bb_cond = load_Allard_Phoenix(
"data/lte052-4.5-0.0a+0.0.BT-Cond.7")
def test_spec_max_delta_applies_max_delta_on_xaxis(xaxis, rv, gamma):
spec = Spectrum(xaxis=xaxis, flux=np.ones(len(xaxis)))
assert spec_max_delta(spec, rv, gamma) == max_delta(xaxis, rv, gamma)
