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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 J003315.30+001204.1123766378420102766296899187PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
1237663784201027662968991871PRIMARY
1237667172929765420968991872SECONDARY
1237676325495046188968991872SECONDARY
1237646011623669776968991872SECONDARY
1237659755521179720968991872SECONDARY
1237659905861681163968991872SECONDARY
1237660026118012997968991872SECONDARY
1237660223688671331968991872SECONDARY
1237660356824793105968991872SECONDARY
1237663277394559040968991872SECONDARY
1237663479274078294968991872SECONDARY
1237663526521929811968991872SECONDARY
1237663715481092182968991872SECONDARY