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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 J002731.56+001020.6123766378420037311396888569PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663784200373113968885691PRIMARY
1237667172929175807968885692SECONDARY
1237646011623014800968885692SECONDARY
1237653012439499201968885692SECONDARY
1237659755520590187968885692SECONDARY
1237659905861026334968885692SECONDARY
1237660026117358222968885692SECONDARY
1237660223688081802968885692SECONDARY
1237663277393903870968885692SECONDARY
1237663479273488772968885692SECONDARY
1237663526521340340968885692SECONDARY
1237663715480502654968885692SECONDARY