| 1 | space telescope imaging spectrograph | STIS | 117 | 8 | 2.001423 | 0101548,0101307,etc |
| 2 | proportional counter array | PCA | 43 | 7 | 1.0007 | 0101459,0101540,etc |
| 3 | high resolution imager | HRI | 84 | 7 | 2.004461 | 0101437,0101410,etc |
| 4 | signal to noise | S/N | 35 | 7 | 1.000287 | 0101032,0101153,etc |
| 5 | inverse compton | IC | 120 | 7 | 2.002386 | 0101145,0101301,etc |
| 6 | black hole candidate | BHC | 112 | 6 | 2.003279 | 0101459,0101305,etc |
| 7 | goddard high resolution spectrograph | GHRS | 61 | 6 | 2.000767 | 0101037,0101064,etc |
| 8 | all sky monitor | ASM | 36 | 6 | 1.001754 | 0101452,0101045,etc |
| 9 | burst and transient source experiment | BATSE | 63 | 5 | 2.004246 | 0101163,0101045,etc |
| 10 | low surface brightness | LSB | 176 | 5 | 2.006442 | 0101135,0101276,etc |
| 11 | colour magnitude diagram | CMD | 62 | 4 | 2.001163 | 0101541,0101107,etc |
| 12 | non equilibrium ionization | NEI | 23 | 4 | 1.000518 | 0101281,0101052,etc |
| 13 | synchrotron self compton | SSC | 25 | 4 | 1.001388 | 0101382,0101422,etc |
| 14 | carbon oxygen | CO | 49 | 4 | 2.002482 | 0101047,0101343,etc |
| 15 | low mass x ray binaries | LMXB | 73 | 4 | 2.00117 | 0101160,0101505,etc |
| 16 | dwarf spheroidal | dSph | 70 | 4 | 2.004377 | 0101456,0101276,etc |
| 17 | advanced ccd imaging spectrometer | ACIS | 47 | 4 | 1.001449 | 0101444,0101494,etc |
| 18 | high surface brightness | HSB | 50 | 4 | 1.000398 | 0101404,0101276,etc |
| 19 | star formation history | SFH | 74 | 3 | 1.003871 | 0101074,0101534,etc |
| 20 | kolmogorov smirnov | K-S | 10 | 3 | 1.000121 | 0101486,0101155,etc |
| 21 | hard x ray | HXR | 132 | 3 | 2.007215 | 0101145,0101008,etc |
| 22 | short wavelength spectrometer | SWS | 63 | 3 | 1.001415 | 0101054,0101153,etc |
| 23 | two dimensional | 2D | 22 | 3 | 1.000441 | 0101501,0101397,etc |
| 24 | proportional counter unit | PCU | 12 | 3 | 1.000593 | 0101540,0101026,etc |
| 25 | narrow field instruments | NFI | 14 | 3 | 1.000731 | 0101505,0101045,etc |
| 26 | deep near infrared survey | DENIS | 5 | 3 | 1.000031 | 0101243,0101094,etc |
| 27 | intra cluster medium | ICM | 30 | 3 | 2.00167 | 0101418,0101060,etc |
| 28 | palomar green | PG | 81 | 3 | 2.004633 | 0101270,0101405,etc |
| 29 | nasa extragalactic database | NED | 5 | 3 | 1.000067 | 0101167,0101405,etc |
| 30 | charge transfer efficiency | CTE | 12 | 3 | 1.000409 | 0101235,0101485,etc |
| 31 | cosmic infrared background | CIB | 25 | 3 | 1.001182 | 0101259,0101472,etc |
| 32 | monte carlo | MC | 34 | 3 | 2.000202 | 0101183,0101186,etc |