| rosat all sky survey | RASS | 43 | 7 | 1.001049 | 9911115,9911521,etc |
| inverse compton | IC | 149 | 6 | 2.00222 | 9911132,9911060,etc |
| high resolution imager | HRI | 49 | 5 | 2.002264 | 9911323,9911379,etc |
| power density spectra | PDS | 72 | 5 | 2.001291 | 9911290,9911345,etc |
| proportional counter array | PCA | 70 | 5 | 2.001036 | 9911531,9911338,etc |
| period luminosity | PL | 42 | 4 | 1.002947 | 9911193,9911296,etc |
| friedmann robertson walker | FRW | 17 | 4 | 1.001226 | 9911059,9911530,etc |
| all sky monitor | ASM | 20 | 4 | 2.001211 | 9911179,9911531,etc |
| faint object spectrograph | FOS | 30 | 4 | 2.000642 | 9911128,9911094,etc |
| tauri stars | TTS | 115 | 3 | 1.005352 | 9911508,9911244,etc |
| power density spectrum | PDS | 46 | 3 | 2.000827 | 9911290,9911345,etc |
| smooth particle hydrodynamics | SPH | 12 | 3 | 2.000342 | 9911466,9911280,etc |
| wolf rayet | WR | 101 | 3 | 2.002157 | 9911450,9911271,etc |
| standard cold dark matter | SCDM | 6 | 3 | 1.000533 | 9911447,9911325,etc |
| hot bottom burning | HBB | 24 | 3 | 2.001591 | 9911226,9911033,etc |
| two dimensional | 2D | 11 | 3 | 1.000377 | 9911068,9911183,etc |
| low mass x ray binaries | LMXB | 18 | 3 | 1.001756 | 9911338,9911275,etc |
| space telescope imaging spectrograph | STIS | 49 | 3 | 2.002687 | 9911128,9911363,etc |
| sunyaev zel'dovich | SZ | 19 | 3 | 2.001309 | 9911121,9911057,etc |
| high energy x ray timing experiment | HEXTE | 27 | 3 | 2.000479 | 9911173,9911224,etc |
| black hole candidate | BHC | 14 | 3 | 1.001165 | 9911176,9911318,etc |
| low energy concentrator spectrometer | LECS | 45 | 3 | 2.000332 | 9911352,9911168,etc |
| extended medium sensitivity survey | EEMSS | 12 | 3 | 1.000801 | 9911244,9911037,etc |
| compact steep spectrum | CSS | 17 | 3 | 1.002746 | 9911474,9911063,etc |
| charge transfer efficiency | CTE | 21 | 3 | 1.000148 | 9911020,9911187,etc |