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 J052534.85+010617.11237646588247212556122445924PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376465882472125561224459241PRIMARY
12376467084939104881224459242SECONDARY
12376467514328351491224459242SECONDARY
12376581674503373301224459242SECONDARY
12376664095517584201224459242SECONDARY
12376763050998499801224459242SECONDARY
12376465495894263261224459242SECONDARY