| inverse compton | IC | 67 | 5 | 1.001011 | 9711339,9711212,etc |
| rosat all sky survey | RASS | 24 | 4 | 2.000927 | 9711158,9711268,etc |
| deutsche agentur f"ur raumfahrtangelegenheiten | DARA | 5 | 4 | 1.000236 | 9711345,9711171,etc |
| faint object spectrograph | FOS | 31 | 4 | 2.001163 | 9711210,9711324,etc |
| narrow field instrument | NFI | 15 | 3 | 1.001422 | 9711279,9711215,etc |
| burst and transient source experiment | BATSE | 27 | 3 | 2.000116 | 9711346,9711306,etc |
| viewing period | VP | 15 | 3 | 1.002504 | 9711345,9711111,etc |
| all sky monitor | ASM | 12 | 3 | 1.000747 | 9711171,9711164,etc |
| friends of friends | FOF | 57 | 3 | 1.00446 | 9711116,9711114,etc |