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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 J031145.11+000450.5123766378421839547397324122PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663784218395473973241221PRIMARY
1237667129982517364973241222SECONDARY
1237676325512413854973241222SECONDARY
1237645942901506788973241222SECONDARY
1237646380985352961973241222SECONDARY
1237656551470203581973241222SECONDARY
1237657109822964536973241222SECONDARY
1237659884372296386973241222SECONDARY
1237660026135380852973241222SECONDARY
1237660240849666875973241222SECONDARY
1237660335343797067973241222SECONDARY
1237663277411861364973241222SECONDARY
1237663526539297610973241222SECONDARY