estimate_local_background

sitelle.source.estimate_local_background(x, y, cube, small_bin=3, big_bin=30)

Estimation of a local background spectrum. For a given position, the background spectrum is defined as the median taken in a big_bin x big_bin pixels box from which the small_bin x small_bin center pixels have been excluded.

Parameters:

• x (int) – Abscisse position, in pixels
• y (int) – Ordinate position, in pixels
• cube (SpectralCube) – SpectralCube instance where we are looking at the source
• small_bin (int) – (Optional) Size of the inner region. Default = 3
• big_bin (int) – (Optional) Size of the outter region. Default = 30

Returns:

bkg_spec – The corresponding spectrum

Return type:

1D ndarray