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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 J003054.91-001941.8123766378366389475887886778PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663783663894758878867781PRIMARY
1237667172392632526878867782SECONDARY
1237646011086536836878867782SECONDARY
1237653011903021208878867782SECONDARY
1237659754984046793878867782SECONDARY
1237659905324548227878867782SECONDARY
1237660025580880019878867782SECONDARY
1237660223151538462878867782SECONDARY
1237660356287660182878867782SECONDARY
1237663276857426052878867782SECONDARY
1237663478736945383878867782SECONDARY
1237663525984796919878867782SECONDARY
1237663714943959273878867782SECONDARY