| 1 | signal to noise | S/N | 59 | 16 | 1.000576 | 0501018,0501228,etc |
| 2 | astrophysical research consortium | ARC | 13 | 11 | 1.000145 | 0501178,0501042,etc |
| 3 | max planck institute for astronomy | MPIA | 11 | 11 | 1.000065 | 0501178,0501042,etc |
| 4 | intra cluster medium | ICM | 65 | 9 | 1.000955 | 0501432,0501658,etc |
| 5 | kolmogorov smirnov | K-S | 33 | 9 | 1.000342 | 0501505,0501550,etc |
| 6 | inverse compton | IC | 58 | 8 | 2.001344 | 0501265,0501391,etc |
| 7 | power density spectra | PDS | 41 | 7 | 2.001274 | 0501186,0501306,etc |
| 8 | proportional counter array | PCA | 35 | 6 | 2.001057 | 0501285,0501297,etc |
| 9 | advanced camera for surveys | ACS | 130 | 6 | 2.002752 | 0501633,0501475,etc |
| 10 | wide field camera | WFC | 61 | 6 | 2.001182 | 0501375,0501475,etc |
| 11 | giant meter radio telescope | GMRT | 23 | 5 | 1.001761 | 0501285,0501297,etc |
| 12 | space telescope imaging spectrograph | STIS | 75 | 5 | 2.001071 | 0501481,0501382,etc |
| 13 | power density spectrum | PDS | 23 | 5 | 1.001805 | 0501297,0501277,etc |
| 14 | friedmann robertson walker | FRW | 28 | 5 | 1.000534 | 0501396,0501652,etc |
| 15 | collisional ionization equilibrium | CIE | 15 | 5 | 2.000504 | 0501543,0501561,etc |
| 16 | very high energy | VHE | 31 | 5 | 2.001623 | 0501576,0501199,etc |
| 17 | ultra luminous x ray source | ULX | 979 | 5 | 2.010116 | 0501306,0501242,etc |
| 18 | wide field planetary camera 2 | WFPC2 | 89 | 5 | 2.001679 | 0501341,0501083,etc |
| 19 | magneto rotational instability | MRI | 30 | 5 | 1.001306 | 0501468,0501198,etc |
| 20 | low surface brightness | LSB | 101 | 5 | 1.00359 | 0501406,0501567,etc |
| 21 | two component advective flow | TCAF | 10 | 4 | 2.000629 | 0501281,0501284,etc |
| 22 | uniform disk | UD | 18 | 4 | 1.000344 | 0501261,0501420,etc |
| 23 | very large telescope interferometer | VLTI | 71 | 4 | 2.003387 | 0501261,0501532,etc |
| 24 | colour magnitude diagram | CMD | 66 | 4 | 2.002184 | 0501481,0501511,etc |
| 25 | indian space research organization | ISRO | 4 | 4 | 1.000446 | 0501283,0501292,etc |
| 26 | photodissociation region | PDR | 171 | 4 | 2.005142 | 0501034,0501536,etc |
| 27 | deutsche forschungsgemeinschaft | DFG | 4 | 4 | 1.000065 | 0501525,0501654,etc |
| 28 | rosat all sky survey | RASS | 14 | 4 | 1.000893 | 0501113,0501586,etc |
| 29 | wolf rayet | WR | 139 | 4 | 2.004551 | 0501563,0501391,etc |
| 30 | high energy transmission grating spectrometer | HETGS | 23 | 3 | 2.000432 | 0501472,0501097,etc |
| 31 | charge transfer inefficiency | CTI | 6 | 3 | 1.000081 | 0501432,0501542,etc |
| 32 | dwarf spheroidal | dSph | 123 | 3 | 2.002301 | 0501398,0501083,etc |
| 33 | advanced ccd imaging spectrometer | ACIS | 14 | 3 | 1.001568 | 0501501,0501561,etc |
| 34 | magneto hydrodynamic | MHD | 11 | 3 | 1.000278 | 0501501,0501008,etc |
| 35 | redistribution matrix file | RMF | 4 | 3 | 1.00003 | 0501347,0501486,etc |
| 36 | hubble deep field north | HDFN | 5 | 3 | 1.000107 | 0501382,0501397,etc |
| 37 | circumstellar medium | CSM | 26 | 3 | 1.000684 | 0501561,0501433,etc |
| 38 | warm neutral medium | WNM | 20 | 3 | 1.000975 | 0501550,0501332,etc |
| 39 | calibration database | CALDB | 5 | 3 | 1.000077 | 0501411,0501076,etc |
| 40 | burst and transient source experiment | BATSE | 51 | 3 | 2.003531 | 0501576,0501386,etc |
| 41 | nasa extragalactic database | NED | 18 | 3 | 2.000477 | 0501664,0501188,etc |
| 42 | particle physics and astronomy research council | PPARC | 5 | 3 | 1.000524 | 0501265,0501208,etc |
| 43 | monte carlo | M-C | 22 | 3 | 2.000771 | 0501380,0501146,etc |
| 44 | charge transfer efficiency | CTE | 26 | 3 | 1.000474 | 0501537,0501442,etc |
| 45 | adaptive refinement tree | ART | 17 | 3 | 1.000541 | 0501227,0501179,etc |
| 46 | friends of friends | FoF | 36 | 3 | 2.001671 | 0501452,0501224,etc |
| 47 | indian x ray astronomy experiment | IXAE | 34 | 3 | 1.001895 | 0501277,0501282,etc |
| 48 | compact steep spectrum | CSS | 14 | 3 | 1.000155 | 0501544,0501616,etc |
| 49 | full width half maximum | FWHM | 5 | 3 | 1.000123 | 0501628,0501076,etc |
| 50 | power law | PL | 11 | 3 | 1.000049 | 0501528,0501253,etc |
| 51 | black body | BB | 7 | 3 | 1.000087 | 0501528,0501253,etc |
| 52 | ghz peaked spectrum | GPS | 34 | 3 | 2.001334 | 0501616,0501068,etc |
| 53 | direct urca | Durca | 9 | 3 | 1.000166 | 0501653,0501678,etc |
| 54 | orion nebula cluster | ONC | 57 | 3 | 2.001775 | 0501075,0501534,etc |