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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 J211837.28-010537.9123765656704142572069927117PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237656567041425720699271171PRIMARY
1237659904229769257699271172SECONDARY
1237660024486101077699271172SECONDARY
1237660191991660675699271172SECONDARY
1237660222056759524699271172SECONDARY
1237663456166936810699271172SECONDARY
1237663477642166538699271172SECONDARY
1237663524890017977699271172SECONDARY
1237666228594999447699271172SECONDARY
1237666647330390149699271172SECONDARY
1237678881539817680699271172SECONDARY
1237649939908133029699271172SECONDARY
1237653010808242219699271172SECONDARY