Table 2.
Sky regions used in the MST search for photon clusters.
| Region | Solid angle | Photon number | Λcut | Nps | Nss | ||||
| sr | N | S | N | S | N | S | N | S | |
| |b| > 79° | 0.1154 | 4639 | 3162 | 7ʹ̣4 | 13ʹ̣3 | 58 | 127 | 20 | 28 |
| 64° < |b| < 81° A | 0.2824 | 10521 | 6428 | 6ʹ̣8 | 10ʹ̣1 | 102 | 138 | 45 | 42 |
| 64° < |b| < 81° B | 0.2955 | 9498 | 6014 | 7ʹ̣5 | 10ʹ̣5 | 105 | 154 | 42 | 44 |
| 49° < |b| < 66° A | 0.5045 | 17267 | 14297 | 7ʹ̣4 | 8ʹ̣7 | 197 | 278 | 71 | 75 |
| 49° < |b| < 66° B | 0.5101 | 16361 | 12570 | 7ʹ̣9 | 9ʹ̣4 | 228 | 266 | 65 | 81 |
| 34° < |b| < 51° A | 0.6923 | 24822 | 24121 | 7ʹ̣6 | 8ʹ̣0 | 425 | 512 | 110 | 93 |
| 34° < |b| < 51° B | 0.6999 | 23126 | 21469 | 8ʹ̣2 | 8ʹ̣4 | 564 | 435 | 107 | 86 |
| 19° < |b| < 36° C | 0.1876 | 11769 | 10209 | 6ʹ̣1 | 6ʹ̣5 | 298 | 252 | 17 | 20 |
| 19° < |b| < 36° D | 0.6544 | 25942 | 24282 | 7ʹ̣4 | 7ʹ̣8 | 466 | 510 | 94 | 89 |
| 19° < |b| < 36° E | 0.7002 | 22555 | 25512 | 8ʹ̣4 | 7ʹ̣8 | 494 | 539 | 96 | 78 |
| 19° < |b| < 36° F | 0.1510 | 9368 | 7060 | 5ʹ̣9 | 6ʹ̣8 | 208 | 147 | 24 | 15 |
Note. There is an overlap on each side of the regions. The total number of photons and the resulting separation lengths for the north and south Galactic regions are given; the well evident N-S asymmetry is mainly because of the different exposures. In the last two columns the number of clusters found in each region are reported with the primary selection and after the application of the secondary and superselection, as described in the text. The Galactic longitude intervals are A: 0° < l < 182°; B: 178° < l < 362°; C: 0° < l < 41°; D: 39° < l < 182°; E: 178° < l < 331°; and F: 329° < l < 362°.
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