| wolf rayet | WR | 364 | 9 | 2.007597 | 9812410,9812357,etc |
| proportional counter array | PCA | 73 | 9 | 1.002038 | 9812358,9812160,etc |
| all sky monitor | ASM | 37 | 8 | 1.000683 | 9812420,9812358,etc |
| tully fisher | TF | 194 | 6 | 2.001951 | 9812020,9812275,etc |
| low surface brightness | LSB | 96 | 6 | 2.006318 | 9812241,9812033,etc |
| high resolution imager | HRI | 93 | 6 | 1.002129 | 9812245,9812217,etc |
| inverse compton | IC | 97 | 5 | 2.003743 | 9812458,9812148,etc |
| particle mesh | PM | 18 | 5 | 1.000224 | 9812241,9812129,etc |
| burst and transient source experiment | BATSE | 40 | 5 | 1.001256 | 9812160,9812475,etc |
| cam interactive analysis | CIA | 6 | 4 | 1.000349 | 9812090,9812476,etc |
| high energy x ray timing experiment | HEXTE | 41 | 4 | 1.002008 | 9812160,9812210,etc |
| rosat all sky survey | RASS | 127 | 4 | 2.002622 | 9812455,9812436,etc |
| sunyaev zel'dovich | SZ | 53 | 4 | 2.004487 | 9812377,9812237,etc |
| black hole candidate | BHC | 43 | 4 | 2.001279 | 9812308,9812180,etc |
| hubble deep field south | HDF-S | 24 | 3 | 1.000399 | 9812105,9812190,etc |
| intra cluster medium | ICM | 12 | 3 | 1.000382 | 9812417,9812394,etc |
| proportional counter units | PCU | 8 | 3 | 1.000537 | 9812358,9812160,etc |
| particle physics and astronomy research council | PPARC | 4 | 3 | 1.000049 | 9812177,9812183,etc |
| x ray luminosity function | XLF | 45 | 3 | 2.006113 | 9812307,9812394,etc |
| low resolution imaging spectrometer | LRIS | 11 | 3 | 2.000876 | 9812110,9812218,etc |
| positional sensitive proportional counter | PSPC | 105 | 3 | 2.002339 | 9812455,9812436,etc |
| wide field planetary camera 2 | WFPC2 | 9 | 3 | 1.00016 | 9812266,9812272,etc |
| faint object spectrograph | FOS | 23 | 3 | 1.000548 | 9812265,9812364,etc |
| period luminosity | PL | 79 | 3 | 2.009614 | 9812437,9812074,etc |
| signal to noise | S/N | 11 | 3 | 2.00029 | 9812321,9812296,etc |