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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 J212551.92+000032.7123766345777833588998340007PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663457778335889983400071PRIMARY
1237663479253565674983400072SECONDARY
1237663526501417118983400072SECONDARY
1237666648941789263983400072SECONDARY
1237649941519532183983400072SECONDARY
1237653012419641388983400072SECONDARY
1237656568652824808983400072SECONDARY
1237659905841168422983400072SECONDARY
1237660026097500253983400072SECONDARY
1237660193603059780983400072SECONDARY
1237660223668158637983400072SECONDARY