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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 J222545.29+005956.21237678617407521650118287610PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376786174075216501182876101PRIMARY
12376500113088187291182876102SECONDARY
12376530134999372261182876102SECONDARY
12376565697331207401182876102SECONDARY
12376565783127660031182876102SECONDARY
12376599069214642771182876102SECONDARY
12376600271777961911182876102SECONDARY
12376602247484545381182876102SECONDARY
12376603578845762871182876102SECONDARY
12376634803338615661182876102SECONDARY
12376635275817130651182876102SECONDARY
12376666500220850901182876102SECONDARY