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Term | Explanation |
---|---|
Detection | Catalog data for a single source from a single exposure. |
Object | Catalog data for one or more associated detections. |
Sky cell | One tile in the PS1 tessellation of the sky. |
Stack image | Image constructed by combining all useful warp images that overlap a single sky cell. Sometimes simply referred to as a "stack". |
Stack detection | Catalog data for a single source from a stack image. |
Stack object | Catalog data for one or more associated stack detections. |
Warp image | Image constructed by resampling a single exposure onto a canonical sky cell projection. Sometimes simply referred to as a "warp". |
Ubercal | The process that uses comparisons in flux measurements from overlapping exposures to improve the global calibration. |