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Other photometric observations (detections)

Due to overlaps in imaging stripes, the SDSS sometimes observes the same object more than once. In such cases, we select one observation as PRIMARY (mode=1). Each astronomical object is assigned a thingID, and each time that "thing" is observed (detected in SDSS imaging), it assigned a separate objID.

Information about each astronomical "thing" is stored in the thingIndex table; thingIndex is a thin coupling table designed only to connect repeat observations. Information about each individual observation (detection) is in the photoObjAll table. (Note that photoObj contains only the primary [mode=1] and secondary [mode=2] observations of each "thing.") The detectionIndex table connects each objID to the thingID it corresponds with.

This detected object and its associated "Thing" (Primary observation)

IAU nameobjidthingidmode description
SDSS J001621.42+005357.01237663278466400871116841747PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376632784664008711168417471PRIMARY
12376634803459852391168417472SECONDARY
12376635275938367801168417472SECONDARY
12376637165529991751168417472SECONDARY
12376637852729346781168417472SECONDARY
12376671740016724301168417472SECONDARY
12376460126955767551168417472SECONDARY
12376530135119959861168417472SECONDARY
12376597565930866811168417472SECONDARY
12376599069335226641168417472SECONDARY
12376600271899201301168417472SECONDARY
12376602247605782791168417472SECONDARY
12376603578967001541168417472SECONDARY