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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 J031952.21-005013.3123766378314550538378156882PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663783145505383781568821PRIMARY
1237666724649959904781568822SECONDARY
1237667128909693433781568822SECONDARY
1237645876893450842781568822SECONDARY
1237646585549095583781568822SECONDARY
1237656550397313880781568822SECONDARY
1237656601934824162781568822SECONDARY
1237657108750140048781568822SECONDARY
1237657584954508066781568822SECONDARY
1237659754465657703781568822SECONDARY
1237660239776777057781568822SECONDARY
1237660334270972615781568822SECONDARY
1237663276339036736781568822SECONDARY
1237663525466472754781568822SECONDARY