Table 1
Assessment of EM and Pixon performances for synthetic data.
| EM | Pixon | EM | Pixon | EM | Pixon | g. t. | |
| 105 | 105 | 104 | 104 | 103 | 103 | ||
|
|
|||||||
| A1 | –0.1 | –0.1 | –0.4 | –0.6 | 3.3 | 3.8 | 0.0 |
| A2 | 1 | 1 | 3 | 2 | 2 | 2 | 1 |
| A3 | 18.9 | 19.8 | 17.8 | 18.3 | 13.5 | 14.5 | 20.2 |
| A4 | 2.1 | 3.0 | 1.9 | 2.2 | 3.5 | 4.3 | 1.4 |
|
|
|||||||
| B1 | 0.0 | –0.1 | –0.1 | 0.0 | –1.0 | 0.1 | 0.0 |
| B2 | 4 | 4 | 4 | 4 | 3 | 3 | 4 |
| B3 | 16.4 | 17.8 | 16.4 | 16.6 | 15.9 | 17.1 | 16.9 |
| B4 | 2.1 | 3.8 | 2.2 | 2.8 | 1.9 | 3.1 | 1.4 |
|
|
|||||||
| C1 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.0 |
| C2 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.0 |
| C3 | 19.0 | 22.0 | 19.0 | 19.0 | 20.0 | 19.0 | 20.0 |
| C4 | 3.0 | –2.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| C5 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
|
|
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| D1 | 0.7 | 1.6 | 0.7 | 1.6 | 0.7 | 3.6 | 0.0 |
| D2 | 0.7 | 1.6 | 0.7 | 1.6 | 0.7 | 3.5 | 0.0 |
| D3 | 20.0 | 18.0 | 19.0 | 19.0 | 20.0 | 24.0 | 20.0 |
| D4 | 0.0 | 0.0 | –3.1 | 0.0 | –2.9 | –2.4 | 0.0 |
| D5 | 4.7 | 5.1 | 5.0 | 5.6 | 7.6 | 11.5 | 5.0 |
|
|
|||||||
| E1 | 0.7 | 1.6 | 0.7 | 7.6 | 3.5 | 9.9 | 0.0 |
| E2 | 0.7 | 1.6 | 0.7 | 7.5 | 3.5 | 9.9 | 0.0 |
| E3 | 19.0 | 19.0 | 19.0 | 28.0 | 23.0 | 27.7 | 20.0 |
| E4 | 0.0 | 0.0 | 0.0 | –2.1 | 0.0 | –12.5 | 0.0 |
| E5 | 10.0 | 11.7 | 16.2 | 17.0 | 29.7 | 42.7 | 10.0 |
Notes.105, 104 and 103 (counts per detector) indicate the three different levels of statistics considered in the test. The comparison is made with the parameters characterizing the simulated configurations represented in the first row of Fig. 1 (ground truth parameters in the last column). The meaning of the parameters in the first column is described in the text. Parameters A2, B2, C5, D5 and E5 are pure numbers; parameters A1, B1, C4, D4 and E4 are in deg; all other parameters are in arcsec.
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