remove_starlight

remove_starlight#

excalibuhr.utils.remove_starlight(D_full, V_full, spec_star, cen0_p, cen1_p, aper0=40, aper1=10, sub_factor=32, gain=2.0, NDIT=1.0, debug=False)[source]#

[EXPERIMENTAL!] Remove starlight contamination at the position of the widely separated companion in a 2D detector image.

Parameters:

  • D_full (array) – cropped image of one order

  • V_full (array) – Variance of the input image accounting for sky background and readout noise

  • spec_star (array) – in case of sub-stellar companion extraction and remove_star_bkg=True, provide the extracted stellar spectra. This will be scaled according to the PSF and then removed from the science image before extracting the companion spectra.

  • cen0_p (float) – location of the star on slit in pixel

  • cen1_p (float) – location of the companion on slit in pixel

  • aper0 (int) – half aperture for masking the negative primary trace

  • aper1 (int) – half aperture for masking the negative secondary trace and the primary line core

  • aper2 (int) – half aperture for determining the line center

  • sub_factor (int) – binning factor along the dispersion axis

  • gain (float) – detector gain

  • NDIT (int) – number of DIT exposure coadded

Returns:

D_full, Err_full – image and error after the starlight removal

Return type:

array

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