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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 J211801.82+000432.4123766345777748428998316192PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663457777484289983161921PRIMARY
1237663474954011178983161922SECONDARY
1237663479252714054983161922SECONDARY
1237663526500565542983161922SECONDARY
1237666648940937580983161922SECONDARY
1237649941518680527983161922SECONDARY
1237653012418789671983161922SECONDARY
1237656568651973289983161922SECONDARY
1237659905840316796983161922SECONDARY
1237660026096648708983161922SECONDARY
1237660193602208131983161922SECONDARY
1237660223667307028983161922SECONDARY