DR13

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 J052857.81+010026.91237658188924322752116544738PRIMARY

Other Observations of this "Thing"

objidthingidmodemode description
12376581889243227521165447381PRIMARY
12376633342956017801165447382SECONDARY
12376763045632418981165447382SECONDARY
12376463820741028291165447382SECONDARY
12376466483757063091165447382SECONDARY
12376467514331635001165447382SECONDARY
12376467938388220251165447382SECONDARY