megaradrp.processing — Processing functions

megaradrp.processing.wavecalibration

Corrector for wavelength calibration

class megaradrp.processing.wavecalibration.SimpleWcs1D(crval=0, crpix=0, cdelt=1, ctype='', cunit='', **kwargs)

Store parameters of a simple 1D WCS

class megaradrp.processing.wavecalibration.WavelengthCalibrator(solutionwl, datamodel=None, dtype='float32')

A Node that applies wavelength calibration.

megaradrp.processing.wavecalibration.calibrate_wl_rss(rss, solutionwl, npix, targetwcs, dtype='float32', span=0, inplace=False)

Apply wavelength calibration to a RSS

Parameters:
rss: astropy.io.fits.HDUList

A Row stacked Spectra MEGARA image, not WL calibrated

solutionwl: megaradrp.products.wavecalibration.WavelengthCalibration

A wavelength calibration solution

npix: int

Number of channels of the calibrated RSS

targetwcs: SimpleWcs1D

Common WCS solution

dtype: str

Convertible to numpy.dtype

span: int

Remove span pixels at both sides of the resampled image

inplace: bool

The input RSS is modified inplace, if False, a copy is made

Returns:
rss: astropy.io.fits.HDUList

A Row stacked Spectra MEGARA image, WL calibrated

megaradrp.processing.wavecalibration.calibrate_wl_rss_megara(rss, solutionwl, dtype='float32', span=0, inplace=False)

Apply wavelength calibration to a RSS

Parameters:
rss: astropy.io.fits.HDUList

A Row stacked Spectra MEGARA image, not WL calibrated

solutionwl: megaradrp.products.wavecalibration.WavelengthCalibration

A wavelength calibration solution

dtype: str

Convertible to numpy.dtype

span: int

Remove span pixels at both sides of the resampled image

inplace: bool

The input RSS is modified inplace, if False, a copy is made

Returns:
rss: astropy.io.fits.HDUList

A Row stacked Spectra MEGARA image, WL calibrated

megaradrp.processing.wavecalibration.resample_rss_flux(arr, solutionwl, npix, finalwcs, span=0, fill=0)

Resample array according to a wavelength calibration solution

Parameters:
arr: numpy.ndarray

A Row stacked Spectra MEGARA image, not WL calibrated

solutionwl: megaradrp.products.wavecalibration.WavelengthCalibration

A wavelength calibration solution

npix: int

Number of channels of the calibrated RSS

finalwcs: astropy.wcs.WCS

WCS solution of the final array

span: int

Remove span pixels at both sides of the resampled image

fill: int

Value used to fill the values removed by span

Returns:
rss_resampled: numpy.ndarray

A resample array

limits: a list of tuples

Contains the fiberid and a pair with the first and last valid pixel (0-based)

megaradrp.processing.wavecalibration.rss_add_wcs(hdr, crval, cdelt, crpix)

Add MEGARA 2D wavelength calibration headers