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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 J002025.21+005047.11237663278466859158116832148PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376632784668591581168321481PRIMARY
12376634803464439071168321482SECONDARY
12376635275942953351168321482SECONDARY
12376637165534576901168321482SECONDARY
12376637852733933301168321482SECONDARY
12376671740021309701168321482SECONDARY
12376458790212731561168321482SECONDARY
12376530135124542041168321482SECONDARY
12376597565935452431168321482SECONDARY
12376599069339813171168321482SECONDARY
12376600271903786491168321482SECONDARY
12376602247610368291168321482SECONDARY
12376603578970932461168321482SECONDARY