Table 2
Results of the automatic association procedure for each catalog used (see main text for details and selections applied).
| Type | Number of objects | Total number of | Number of HGPS sources |
|---|---|---|---|
| in HGPS region | associations | with at least 1 association | |
| 2FHL sources | 44 | 31 | 29 |
| 3FGL sources | 352 | 64 | 40 |
| Supernova remnants | 211 | 24 | 21 |
| Pulsar wind nebulae | 29 | 16 | 16 |
| Composite remnants | 42 | 21 | 20 |
| Energetic pulsars | 222 | 47 | 42 |
| Extra associations | – | 20 | – |
Notes. The second column lists the numbers of objects in the HGPS survey region for each catalog. The third column gives the total number of associations found. The last column gives the number of HGPS sources having at least one associated object of a given category. The difference between the two last columns is only large for 3FGL because 3FGL is the only counterpart catalog for which the source density is so high that many HGPS sources are associated with multiple 3FGL sources. Out of the 78 HGPS sources, only 11 are left without any association.
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