Open Access
Table 2
Number of mock galaxies, real sources, and false positives detected by each source-finding method prior to applying the random forest classifier.
| Frequency range (MHz) | Mock galaxies | Real sources | False positives | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| SoFiA | MTO | V-Net | SoFiA | MTO | V-Net | SoFiA | MTO | V-Net | ||
| Training | 1280–1304 | 0 (0%) | 2 (1%) | 40 (13%) | 0 | 1 | 1 | 33 | 2069 | 44 |
| Pointing | 1300–1324 | 15 (5%) | 1 (0%) | 93 (31%) | 10 | 0 | 11 | 74 | 0 | 34 |
| 1320–1344 | 54 (18%) | 6 (2%) | 145 (48%) | 3 | 0 | 2 | 52 | 1 | 35 | |
| 1341–1364 | 85 (28%) | 20 (7%) | 199 (66%) | 15 | 3 | 14 | 32 | 4 | 25 | |
| 1361–1385 | 175 (58%) | 66 (22%) | 258 (86%) | 10 | 3 | 8 | 156 | 10 | 13 | |
| 1381–1405 | 268 (89%) | 190 (63%) | 292 (97%) | 41 | 21 | 35 | 70 | 9 | 12 | |
| Total | 597 | 285 | 1027 | 79 | 28 | 71 | 417 | 2093 | 163 | |
| Test | 1280–1304 | 1 (0%) | 1 (0%) | 7 (2%) | 0 | 0 | 0 | 23 | 3094 | 1030 |
| Pointing | 1300–1324 | 23 (8%) | 0 (0%) | 34 (11%) | 23 | 1 | 11 | 184 | 13 | 20 |
| 1320–1344 | 61 (20%) | 5 (2%) | 55 (18%) | 1 | 0 | 0 | 65 | 12 | 21 | |
| 1341–1364 | 108 (36%) | 26 (9%) | 111 (37%) | 40 | 4 | 20 | 79 | 65 | 40 | |
| 1361–1385 | 154 (51%) | 79 (26%) | 193 (64%) | 24 | 7 | 17 | 13 | 64 | 33 | |
| 1381–1405 | 279 (93%) | 199 (66%) | 278 (93%) | 24 | 14 | 18 | 63 | 240 | 29 | |
| Total | 626 | 310 | 678 | 112 | 26 | 66 | 427 | 3488 | 1173 | |
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