DR13

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 J022851.25+002211.71237666408458682504103520911PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376664084586825041035209111PRIMARY
12376664986278298501035209112SECONDARY
12376667262549361601035209112SECONDARY
12376529995340842211035209112SECONDARY
12376535793509991601035209112SECONDARY
12376565128229029001035209112SECONDARY
12376565944242013161035209112SECONDARY
12376570711634085121035209112SECONDARY
12376578141956342631035209112SECONDARY
12376635050569237771035209112SECONDARY