center_wcs¶
- msaexp.drizzle.center_wcs(slit, waves, center_on_source=False, force_nypix=31, fix_slope=None, slit_center=0.0, center_phase=-0.5)[source]¶
Derive a 2D spectral WCS centered on the expected source position along the slit
- Parameters
- slit
jwst.datamodels.SlitModel Slitlet data object
- wavesarray-like
Target wavelength array
- center_on_sourcebool
Center on the source position along the slit. If not, center on
slit_centerslit coordinate- force_nypixint
Cross-dispersion size of the output 2D WCS
- fix_slopefloat
Fixed cross-dispersion pixel size, in units of the slit coordinate frame
- slit_centerfloat
Define the center of the slit in the slit coordinate frame
- center_phasefloat
Pixel phase defining the center of the slit alignment
- slit
- Returns
- wcs_dataobject
Output from
msaexp.utils.build_slit_centered_wcs- offset_to_sourcefloat
Offset between center of the WCS and the expected source position
- metatuple
MSA key from
msaexp.drizzle.metadata_tuple