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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 J002851.28-001709.6123766378366369803887883991PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663783663698038878839911PRIMARY
1237667172392435845878839912SECONDARY
1237678432717242565878839912SECONDARY
1237646011086274718878839912SECONDARY
1237653011902759080878839912SECONDARY
1237659754983850116878839912SECONDARY
1237659905324286099878839912SECONDARY
1237660025580683377878839912SECONDARY
1237660223151341709878839912SECONDARY
1237660356287398069878839912SECONDARY
1237663276857163945878839912SECONDARY
1237663478736748682878839912SECONDARY
1237663525984600192878839912SECONDARY
1237663714943762557878839912SECONDARY