Images

Images of the sky in the six LSST filters with a variety of calibration levels.

The schema browser includes tables of image metadata (ObsCore).

The “Butler Dataset type” entry on each image type’s page is of the format (‘datasetTypeName’, {dimension1, dimension2, dimension3}, StorageClass), where dimensions in bold are required dimensions for retrieving datasets of this type.

Coadd images

Combinations of multiple calibrated images of the same region of the sky to achieve greater depth (to detect fainter objects), or for use as templates in difference image analysis.

• Deep coadd
• Template coadd

Visit images

Processed and calibrated images from individual visits (single observations).

• Visit image

Difference images

Created by subtracting a template image from a visit image.

• Difference image

Raw exposures

The unprocessed images received directly from the camera.

• Raw exposure