SingleCellCoadd

class lsst.cell_coadds.SingleCellCoadd(outer: OwnedImagePlanes, *, psf: ImageD, inner_bbox: Box2I, inputs: Iterable[ObservationIdentifiers], common: CommonComponents, identifiers: CellIdentifiers)

Bases: CommonComponentsProperties

A single coadd cell, built only from input images that completely overlap that cell.

Parameters:

outerOwnedImagePlanes

The actual coadded images.

psfImageD

The coadded PSF image.

inner_bboxBox2I

The bounding box of the inner region of this cell; must be disjoint with but adjacent to all other cell inner regions.

inputsIterable [ObservationIdentifiers]

Identifiers of observations that contributed to this cell.

commonCommonComponents

Image attributes common to all cells in a patch.

identifiersCellIdentifiers

Struct of identifiers for this cell.

Notes

At present we assume a single PSF image per cell is sufficient to capture spatial variability, which seems adequate given the results we have so far and the cell sizes we intend to use.

Attributes Summary

band	String label for the filter bandpass.
common	Struct of image components common to all cells in a patch.
identifiers	Struct of unique identifiers for this cell.
inner	Image planes within the inner region of this cell that is disjoint with all other cell inner regions.
inputs	Identifiers for the input images that contributed to this cell, sorted by their visit attribute first, and then by detector.
outer	Image planes within the full outer region of this cell.
psf_image	The coadded PSF image.
units	Units of the coadd's data pixels.
visit_count	Number of visits that contributed to this cell.
wcs	World Coordinate System object that maps the pixel grid to sky coordinates.

Attributes Documentation

band

String label for the filter bandpass.

May be None only for coadds that represent a combination of multiple passbands (e.g. chi^2 detection coadds), not just to indicate absence of knowledge.

common

identifiers

Struct of unique identifiers for this cell.

inner

Image planes within the inner region of this cell that is disjoint with all other cell inner regions.

inputs

Identifiers for the input images that contributed to this cell, sorted by their visit attribute first, and then by detector.

outer

Image planes within the full outer region of this cell.

psf_image

The coadded PSF image.

units

Units of the coadd’s data pixels.

visit_count

Number of visits that contributed to this cell.

wcs

World Coordinate System object that maps the pixel grid to sky coordinates.