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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 J002428.47-004340.9123766378312630297177805467PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663783126302971778054671PRIMARY
1237667171855040755778054672SECONDARY
1237678433253654731778054672SECONDARY
1237646010548945043778054672SECONDARY
1237653011365429435778054672SECONDARY
1237659754446520489778054672SECONDARY
1237659904786956457778054672SECONDARY
1237660025043288258778054672SECONDARY
1237660222614012120778054672SECONDARY
1237660355750068385778054672SECONDARY
1237663276319834317778054672SECONDARY
1237663478199419054778054672SECONDARY
1237663525447270593778054672SECONDARY
1237663714406367504778054672SECONDARY