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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 J003051.20-001702.4123766378366389473887887394PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663783663894738878873941PRIMARY
1237667172392632514878873942SECONDARY
1237646011086536826878873942SECONDARY
1237653011903021191878873942SECONDARY
1237659754984046776878873942SECONDARY
1237659905324548215878873942SECONDARY
1237660025580879995878873942SECONDARY
1237660223151538444878873942SECONDARY
1237660356287660164878873942SECONDARY
1237663276857426041878873942SECONDARY
1237663478736945372878873942SECONDARY
1237663525984796899878873942SECONDARY
1237663714943959248878873942SECONDARY