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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 J134300.58-005907.7123767199080565980372210444PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237671990805659803722104441PRIMARY
1237648672904839424722104442SECONDARY
1237648720168288479722104442SECONDARY
1237650768831185032722104442SECONDARY
1237651202623996077722104442SECONDARY
1237651279933210804722104442SECONDARY
1237651503270658330722104442SECONDARY
1237651705135890571722104442SECONDARY
1237651709430071554722104442SECONDARY