ExplodedCoadd#

class lsst.cell_coadds.ExplodedCoadd(cell_coadd: MultipleCellCoadd, *, pad_psfs_with: float | None = None)#

Bases: StitchedImagePlanes

A lazy-evaluation coadd that stitches together the outer regions of the cells in a MultipleCellCoadd (including multiple values for most pixels).

Parameters#

cell_coaddMultipleCellCoadd: Cell-based coadd to stitch together.
pad_psfs_withfloat or None, optional: A floating-point value to pad PSF images with so each PSF-image cell has the same dimensions as the image (outer) cell it corresponds to. If None, PSF images will not be padded and the full PSF image will generally be smaller than the exploded image it corresponds to.

Notes#

An ExplodedCoadd cannot be serialized in FITS format directly. Instead, the recommended way is to serialize the MultipleCellCoadd instance that was used to construct the object and reconstruct the ExplodedCoadd by calling the explode method on it.

Attributes Summary

`bbox`	The bounding box common to all image planes.
`grid`	Object that defines the piecewise grid (of outer cell regions) that this object stitches together.
`mask_fraction_names`	The names of all mask planes whose fractions were propagated in any cell.
`n_noise_realizations`	The number of noise realizations cells are guaranteed to have.
`psf_grid`	Object that describes the grid on which PSF model images are stitched together.
`psf_image`	A stitched-together image of the PSF models for each cell.

Attributes Documentation

bbox#

grid#

Object that defines the piecewise grid (of outer cell regions) that this object stitches together.

This grid always starts at (0, 0); because there is no way to align this “exploded” grid with the inner cell grid over more than one cell, no attempt is made to align it with the inner cell grid’s overall offset.

mask_fraction_names#

n_noise_realizations#

psf_grid#: Object that describes the grid on which PSF model images are stitched together.

psf_image#: A stitched-together image of the PSF models for each cell.