Table 2
Final outcomes of the three different algorithms (photometric, astrometric, and joint) in analyzing the M 67 data, as compared with the two reference proper motion surveys.
| Zhao | Positive | Negative | False pos. | False neg. |
|
|
||||
| Astrometric | 105 | 2 | 27 | 0 |
| Photometric | 97 | 8 | 21 | 8 |
| Joint | 104 | 2 | 27 | 1 |
|
|
||||
| Sanders | positive | negative | false pos. | false neg. |
|
|
||||
| Astrometric | 115 | 2 | 17 | 0 |
| Photometric | 105 | 6 | 13 | 10 |
| Joint | 114 | 2 | 17 | 1 |
Notes. “Positive” means a star was correctly identified as a cluster member, “negative” means a star was correctly identified as a non-cluster member, “false positive” and “false negative” are mis-classifications.
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