difference_image 1.0.0

• Canonical URL: https://images.lsst.io/schemas/difference_image-1.0.0

• Raw JSON schema

Note

This schema version has been superseded; the current version is 1.2.0.

Fields

Field	Type	Required	Description
aperture_corrections	aperture_correction_map	no	Aperture corrections, keyed by flux algorithm.
backgrounds	background_map	no	Background models associated with this image.
band	string	yes	Short name of the bandpass filter.
bounds	BoundsSerializationModel | null	no	Pixel validity region, if different from the image bounding box.
butler_info	ButlerInfo | null	no	Information about the butler dataset backed by this file.
detector	detector	yes	Geometry and electronic information for the detector.
image	image	yes	The main data image.
indirect	array of any	no	Serialized nested objects that may be saved or read more than once.
kernel	image_basis_convolution_kernel | null	yes	The convolution kernel used to match the (warped) template to the science image.
mask	mask	yes	Bitmask that annotates the main image’s pixels.
metadata	object	no	Additional unstructured metadata.
min_read_version	integer	no	Smallest reader major that can interpret this tree.
obs_info	ObservationInfo	yes	Standardized description of visit metadata
photometric_scaling	FieldSerializationModel | null	no	Scaling that can be used to multiply a post-ISR image to yield calibrated pixel values.
psf	piff_psf | psfex_psf | gaussian_psf | any	yes	PSF model for the image.
schema_version	string	no	Data-model schema version of this tree (major.minor.patch).
sky_projection	sky_projection	yes	Projection that maps the pixel grid to the sky.
summary_stats	observation_summary_stats	yes	Summary statistics for the observation.
templates	array of DifferenceImageTemplateInfo | null	yes	Information about the template coadds that went into this difference image
variance	image	yes	Per-pixel variance estimates for the main image.