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SBART.utils.shift_spectra

SBART.utils.shift_spectra#

Functions

apply_BERV_correction(wave, BERV)

apply_RVshift(wave, stellar_RV)

type wave:

ndarray

apply_wavelength_shift(wave, direction, ...)

We are subtracting the stellar RV for convenience.

interpolate_data(original_lambda, ...[, ...])

Interpolate the input data for a new wavelength solutionx

remove_BERV_correction(wave, BERV)

remove_RVshift(wave, stellar_RV[, BERV])

type wave:

ndarray

shift_to_spectrograph_frame(wave, ...)

Remove the contributions of the RV from the star and remove the BERV correction
apply_RVshift(wave, stellar_RV)#
Parameters:

  • wave (np.ndarray) – [description]

  • stellar_RV (float) – [description]

  • BERV (float, optional) – [description], by default 0

Returns:

[description]

Return type:

np.ndarray

remove_RVshift(wave, stellar_RV, BERV=0)#
Parameters:

  • wave (np.ndarray) – [description]

  • stellar_RV (float) – [description]

  • BERV (float, optional) – [description], by default 0

Returns:

[description]

Return type:

np.ndarray

apply_BERV_correction(wave, BERV)#
remove_BERV_correction(wave, BERV)#
shift_to_spectrograph_frame(wave, stellar_RV, BERV)#

Remove the contributions of the RV from the star and remove the BERV correction

Parameters:

  • wave (np.ndarray) – [description]

  • stellar_RV (float) – [description]

  • BERV (float) – [description]

Returns:

[description]

Return type:

np.ndarray

interpolate_data(original_lambda, original_spectrum, original_errors, new_lambda, lower_limit, upper_limit, propagate_interpol_errors, interpol_cores=4, indexes=None)#

Interpolate the input data for a new wavelength solutionx

Parameters:

  • original_lambda (np.ndarray) – Input wavelengths

  • original_spectrum (np.ndarray) – Input data

  • original_errors (np.ndarray) – INput errors

  • new_lambda (np.ndarray) – Wavelenghts in which we are interpolating

  • lower_limit (np.float64) – above which new_lambda wavelength we can interpolate

  • upper_limit (np.float64) – Below which new_lambda wavelenght we can interpolate

  • propagate_interpol_errors (str) – Method of error propagation. Can be either “propagation” for the analytical propagation, “interpolation” to interpolate input errors or “none” to avoid all error propagation (i.e. return zeros)

  • interpol_cores (int, optional) – Number of cores used in the analitical error propagation, by default 4

  • indexes (np.ndarray, optional) – Previously computed indexes of wavelengths to interpolate, by default None

Returns:

  • new_values (np.ndarray) – INterpolated values

  • new_errors (np.ndarray) – Interpolated errors

  • valid_indexes (np.ndarray) – Indexes, of new_lambda, in which we interpolated

Raises:

Exception – [description]

apply_wavelength_shift(wave, direction, stellar_RV, BERV)#

We are subtracting the stellar RV for convenience. Instead of working with the redshit we are working with blueshit to avoid adding minus everytime we call this function