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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 J002732.03+001004.2123766378420037255896888563PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663784200372558968885631PRIMARY
1237667172929175953968885632SECONDARY
1237646011623014802968885632SECONDARY
1237653012439499203968885632SECONDARY
1237659755520590190968885632SECONDARY
1237659905861026337968885632SECONDARY
1237660026117357833968885632SECONDARY
1237660223688081640968885632SECONDARY
1237660356824138339968885632SECONDARY
1237663277393903924968885632SECONDARY
1237663479273488771968885632SECONDARY
1237663526521340343968885632SECONDARY
1237663715480502653968885632SECONDARY