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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 J030426.37+011047.71237666302164337734121642920PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376663021643377341216429201PRIMARY
12376664095363571821216429202SECONDARY
12376665426528180891216429202SECONDARY
12376766739356718221216429202SECONDARY
12376530006117590851216429202SECONDARY
12376535804286737071216429202SECONDARY
12376565955018104591216429202SECONDARY
12376570722410831851216429202SECONDARY
12376575876371587791216429202SECONDARY
12376599155094987771216429202SECONDARY
12376603407014961521216429202SECONDARY
12376632054712243811216429202SECONDARY
12376633300090886881216429202SECONDARY
12376635061345984261216429202SECONDARY