In PanSTARRS nomenclature, a detection is a source found in a single exposure or a stacked image. Each detection has associated quantities. Detections are combined into "objects" by spatial matching across different exposures and filters.
The starting point for the PS1 data archive is at the Pan-STARRS1 data archive home page.
In PanSTARRS nomenclature, a detection is a source found in a single exposure or a stacked image. Detections are matched across exposures to define objects.
Detections are identified through a standard peak-finding algorithm. The image is convolved with an approximation of the PSF and then divided by a smoothed version of the variance image to define the significance image. Peaks are defined as locations where the significance image exceeds a target threshold, representing the square of the desired signal-to-noise ratio. Peaks are then ordered in decreasing significance, and peaks are retained only if a significant valley separates them from brighter nearby peaks.
The process of identifying detections is complex and involves multiple steps:
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