| 1 | active galactic nucleus | AGN | 269 | 18 | 1.003216 | 9712058,9712359,etc |
| 2 | interstellar medium | ISM | 183 | 14 | 2.002097 | 9712241,9712071,etc |
| 3 | star formation rate | SFR | 311 | 13 | 2.004476 | 9712131,9712213,etc |
| 4 | hubble space telescope | HST | 124 | 13 | 1.00334 | 9712004,9712109,etc |
| 5 | point spread function | PSF | 104 | 13 | 2.00165 | 9712018,9712001,etc |
| 6 | rossi x ray timing explorer | RXTE | 69 | 12 | 1.000857 | 9712170,9712232,etc |
| 7 | cosmic microwave background | CMB | 136 | 11 | 2.003058 | 9712049,9712153,etc |
| 8 | gamma ray burst | GRB | 268 | 9 | 2.007079 | 9712134,9712100,etc |
| 9 | low mass x ray binary | LMXB | 72 | 7 | 1.00442 | 9712120,9712311,etc |
| 10 | advection dominated accretion flow | ADAF | 113 | 7 | 2.002799 | 9712259,9712015,etc |
| 11 | cold dark matter | CDM | 108 | 6 | 1.002127 | 9712318,9712259,etc |
| 12 | position sensitive proportional counter | PSPC | 112 | 6 | 1.00233 | 9712208,9712306,etc |
| 13 | initial mass function | IMF | 54 | 6 | 2.001526 | 9712349,9712261,etc |
| 14 | spectral energy distribution | SED | 43 | 6 | 2.000627 | 9712286,9712161,etc |
| 15 | horizontal branch | HB | 29 | 5 | 2.001874 | 9712280,9712311,etc |
| 16 | kolmogorov smirnov | K-S | 23 | 5 | 1.000743 | 9712339,9712219,etc |
| 17 | hubble deep field | HDF | 68 | 5 | 1.001679 | 9712184,9712261,etc |
| 18 | signal to noise ratio | SNR | 27 | 5 | 1.002425 | 9712109,9712265,etc |
| 19 | burst and transient source experiment | BATSE | 88 | 5 | 2.003508 | 9712193,9712340,etc |
| 20 | broad line region | BLR | 50 | 5 | 2.001277 | 9712182,9712250,etc |
| 21 | luminosity function | LF | 87 | 5 | 2.003424 | 9712027,9712244,etc |
| 22 | nasa/ipac extragalactic database | NED | 5 | 5 | 1.000078 | 9712293,9712250,etc |
| 23 | proportional counter array | PCA | 32 | 5 | 2.001234 | 9712340,9712154,etc |
| 24 | big bang nucleosynthesis | BBN | 38 | 4 | 2.001528 | 9712318,9712109,etc |
| 25 | high resolution imager | HRI | 25 | 4 | 1.000691 | 9712241,9712004,etc |
| 26 | far infrared | FIR | 55 | 4 | 2.001189 | 9712086,9712213,etc |
| 27 | large magellanic cloud | LMC | 20 | 4 | 1.000959 | 9712236,9712193,etc |
| 28 | quasi periodic oscillations | QPO | 124 | 4 | 2.002748 | 9712311,9712140,etc |
| 29 | very large array | VLA | 27 | 4 | 1.00064 | 9712014,9712238,etc |
| 30 | wide field camera | WFC | 22 | 4 | 1.002207 | 9712193,9712282,etc |
| 31 | galactic black hole candidates | GBHC | 9 | 4 | 1.000941 | 9712182,9712278,etc |
| 32 | all sky monitor | ASM | 13 | 4 | 1.001908 | 9712286,9712282,etc |
| 33 | black hole candidate | BHC | 12 | 3 | 2.000139 | 9712170,9712194,etc |
| 34 | gamma ray bursts | GRB | 53 | 3 | 2.019084 | 9712273,9712252,etc |
| 35 | canada france hawaii telescope | CFHT | 17 | 3 | 1.000392 | 9712196,9712004,etc |
| 36 | extreme ultraviolet | EUV | 71 | 3 | 2.005786 | 9712049,9712182,etc |
| 37 | white dwarf | WD | 40 | 3 | 2.005251 | 9712210,9712284,etc |
| 38 | field of view | FOV | 23 | 3 | 1.000123 | 9712032,9712306,etc |
| 39 | energetic x ray imaging survey telescope | EXIST | 136 | 3 | 2.002207 | 9712359,9712357,etc |
| 40 | cd zn te | CZT | 70 | 3 | 1.002574 | 9712359,9712357,etc |
| 41 | astronomy | ASTRON | 3 | 3 | 1.000065 | 9712026,9712311,etc |
| 42 | proportional counter unit | PCU | 13 | 3 | 2.000346 | 9712311,9712340,etc |
| 43 | ultraviolet | UV | 16 | 3 | 1.001159 | 9712173,9712024,etc |
| 44 | zero age main sequence | ZAMS | 12 | 3 | 2.000766 | 9712018,9712349,etc |
| 45 | deuterium to hydrogen ratio | D/H | 245 | 3 | 2.000741 | 9712109,9712265,etc |
| 46 | standard big bang nucleosynthesis | SBBN | 27 | 3 | 2.000226 | 9712109,9712136,etc |
| 47 | d/h absorption system | DHAS | 13 | 3 | 2.000457 | 9712109,9712265,etc |
| 48 | national aeronautics and space administration | NASA | 10 | 3 | 1.00069 | 9712356,9712238,etc |
| 49 | x ray background | XRB | 56 | 3 | 2.002559 | 9712342,9712161,etc |
| 50 | narrow emission line galaxy | NELG | 10 | 3 | 1.000892 | 9712342,9712250,etc |
| 51 | james clerk maxwell telescope | JCMT | 10 | 3 | 1.000223 | 9712219,9712161,etc |
| 52 | optical transient | OT | 37 | 3 | 1.004566 | 9712322,9712082,etc |
| 53 | william herschel telescope | WHT | 4 | 3 | 1.000651 | 9712322,9712155,etc |
| 54 | supernova | SN | 27 | 3 | 1.002185 | 9712349,9712006,etc |
| 55 | black hole | BH | 69 | 3 | 1.009148 | 9712348,9712076,etc |
| 56 | wide field planetary camera 2 | WFPC2 | 33 | 3 | 1.000405 | 9712055,9712060,etc |
| 57 | local thermodynamic equilibrium | LTE | 27 | 3 | 1.003791 | 9712040,9712037,etc |