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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 J211807.43+005737.31237678617936987155118184694PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376786179369871551181846941PRIMARY
12376499425924230591181846942SECONDARY
12376530134925321361181846942SECONDARY
12376565697257807521181846942SECONDARY
12376599069140591941181846942SECONDARY
12376600271703906931181846942SECONDARY
12376601946759506231181846942SECONDARY
12376602247410496031181846942SECONDARY
12376634588512270281181846942SECONDARY
12376634760277537841181846942SECONDARY
12376634803264566521181846942SECONDARY
12376635275743079251181846942SECONDARY
12376666500146798921181846942SECONDARY