| proportional counter array | PCA | 593 | 66 | 1.68305 | 9901125,9901161,etc |
| all sky monitor | ASM | 423 | 51 | 1.433177 | 9901125,9901404,etc |
| inverse compton | IC | 744 | 41 | 1.783208 | 9901018,9901061,etc |
| high resolution imager | HRI | 554 | 40 | 1.601377 | 9901348,9901132,etc |
| rosat all sky survey | RASS | 417 | 39 | 1.489359 | 9902067,9902277,etc |
| kolmogorov smirnov | KS | 137 | 37 | 1.081577 | 9901341,9901214,etc |
| signal to noise | S/N | 186 | 34 | 1.265085 | 9901263,9901101,etc |
| wolf rayet | WR | 1172 | 34 | 2.004289 | 9901269,9901170,etc |
| synchrotron self compton | SSC | 335 | 33 | 1.395584 | 9901324,9901106,etc |
| burst and transient source experiment | BATSE | 397 | 30 | 1.636051 | 9902054,9902190,etc |
| tully fisher | TF | 922 | 30 | 1.836042 | 9903380,9903005,etc |
| space telescope imaging spectrograph | STIS | 393 | 28 | 1.716731 | 9901320,9901280,etc |
| wide field planetary camera 2 | WFPC2 | 313 | 27 | 1.519191 | 9903065,9903245,etc |
| low surface brightness | LSB | 456 | 23 | 1.785533 | 9902249,9902171,etc |
| wide field and planetary camera 2 | WFPC2 | 168 | 23 | 1.522585 | 9903018,9903053,etc |
| wide field camera | WFC | 172 | 22 | 1.274016 | 9901299,9901031,etc |
| particle mesh | PM | 449 | 21 | 1.668524 | 9901191,9901064,etc |
| standard cold dark matter | sCDM | 144 | 21 | 1.238744 | 9901143,9901099,etc |
| very high energy | VHE | 360 | 20 | 1.702018 | 9901365,9901215,etc |
| sunyaev zel'dovich | SZ | 470 | 20 | 1.603504 | 9903379,9903166,etc |
| proportional counter unit | PCU | 75 | 20 | 1.000367 | 9903276,9903360,etc |
| two dimensional | 2D | 132 | 19 | 1.579857 | 9901108,9901279,etc |
| friedmann robertson walker | FRW | 147 | 19 | 1.475136 | 9901040,9901212,etc |
| colour magnitude diagram | CMD | 295 | 19 | 1.685736 | 9901245,9901252,etc |
| faint object spectrograph | FOS | 106 | 19 | 1.631984 | 9901348,9901280,etc |
| period luminosity | PL | 201 | 19 | 1.264433 | 9903393,9903220,etc |
| black hole candidate | BHC | 115 | 18 | 1.445114 | 9901413,9901162,etc |
| optical transient | OT | 324 | 18 | 1.725322 | 9902236,9902182,etc |
| star formation history | SFH | 220 | 18 | 1.889483 | 9903371,9903421,etc |
| high energy x ray timing experiment | HEXTE | 114 | 17 | 1.353282 | 9901125,9901404,etc |
| compact steep spectrum | CSS | 85 | 17 | 1.000993 | 9901387,9901375,etc |
| narrow field instruments | NFI | 82 | 17 | 1.236 | 9901142,9901129,etc |
| low energy concentrator spectrometer | LECS | 262 | 17 | 1.707228 | 9902224,9902329,etc |
| planetary camera | PC | 215 | 17 | 2.000744 | 9903313,9903053,etc |
| press schechter | PS | 154 | 16 | 1.313475 | 9902104,9902320,etc |
| dwarf spheroidal | dSph | 321 | 16 | 2.001413 | 9903065,9903017,etc |
| ministry for university and research | MURST | 15 | 15 | 1.000029 | 9904101,9904203,etc |
| power density spectra | PDS | 136 | 14 | 1.501165 | 9901050,9901162,etc |
| power density spectrum | PDS | 143 | 13 | 2.001603 | 9902212,9902221,etc |
| intra cluster medium | ICM | 82 | 13 | 1.001386 | 9902019,9902058,etc |
| extended medium sensitivity survey | EMSS | 292 | 13 | 1.463735 | 9903044,9903117,etc |
| nasa extragalactic database | NED | 26 | 13 | 1.000272 | 9903443,9903250,etc |
| standard cdm | SCDM | 69 | 12 | 1.000979 | 9905171,9905156,etc |
| space interferometry mission | SIM | 60 | 12 | 1.001733 | 9905120,9905151,etc |
| gas imaging spectrometer | GIS | 119 | 11 | 1.546812 | 9902052,9902075,etc |
| lyon meudon extragalactic database | LEDA | 65 | 10 | 1.000958 | 9901412,9901214,etc |
| short wavelength spectrometer | SWS | 145 | 10 | 2.00087 | 9901042,9901391,etc |
| low resolution imaging spectrograph | LRIS | 38 | 10 | 1.200263 | 9902371,9902147,etc |
| full width half maximum | FWHM | 39 | 10 | 1.200706 | 9903197,9903196,etc |
| photodissociation region | PDR | 157 | 10 | 1.201556 | 9904136,9904202,etc |
| goddard high resolution spectrograph | GHRS | 234 | 10 | 2.001801 | 9905234,9905187,etc |
| solid state imaging spectrometer | SIS | 88 | 9 | 1.778484 | 9903243,9903424,etc |
| high surface brightness | HSB | 132 | 9 | 1.335292 | 9903184,9903064,etc |
| smooth particle hydrodynamics | SPH | 95 | 9 | 2.000708 | 9903488,9903154,etc |
| narrow field instrument | NFI | 25 | 9 | 1.001061 | 9903321,9903267,etc |
| faint object camera | FOC | 79 | 8 | 1.750291 | 9901415,9901382,etc |
| the rgb | TRGB | 84 | 8 | 2.001267 | 9905061,9905051,etc |
| cerro tololo interamerican observatory | CTIO | 89 | 8 | 1.376319 | 9906173,9906316,etc |
| the red giant branch | TRGB | 127 | 8 | 2.001189 | 9908149,9908192,etc |
| kelvin helmholtz | KH | 63 | 7 | 1.429964 | 9901166,9901379,etc |
| diffuse ionized gas | DIG | 194 | 7 | 1.574017 | 9901310,9901068,etc |
| large velocity gradient | LVG | 50 | 7 | 1.714622 | 9901394,9901134,etc |
| imaging atmospheric cherenkov telescope | IACT | 93 | 7 | 2.001255 | 9901160,9901086,etc |
| phoswich detector system | PDS | 83 | 7 | 1.000994 | 9902224,9902022,etc |
| gamma ray burst monitor | GRBM | 37 | 7 | 1.001726 | 9902013,9902096,etc |
| high pressure gas scintillation proportional counter | HPGSPC | 31 | 7 | 1.286388 | 9902022,9902319,etc |
| uk infrared telescope | UKIRT | 37 | 7 | 1.286067 | 9903340,9903410,etc |
| galactic cosmic ray | GCR | 145 | 7 | 1.716872 | 9903369,9903358,etc |
| high frequency instrument | HFI | 19 | 7 | 1.000326 | 9903249,9903137,etc |
| intermediate frequency | IF | 29 | 7 | 1.000565 | 9906504,9906321,etc |
| atacama large millimeter array | ALMA | 59 | 7 | 1.002279 | 9906196,9906141,etc |
| greisen zatsepin kuzmin | GZK | 20 | 7 | 1.000552 | 9906092,9906338,etc |
| low mass x ray binaries | LMXB | 45 | 7 | 1.286979 | 9907297,9907017,etc |
| galactic black hole candidate | GBH | 52 | 6 | 1.667942 | 9901108,9901107,etc |
| x ray luminosity function | XLF | 106 | 6 | 1.336505 | 9902256,9902067,etc |
| center of excellence | COE | 6 | 6 | 1.000061 | 9902350,9902351,etc |
| hardness ratio | HR | 45 | 6 | 1.334403 | 9902096,9902221,etc |
| residual dark distribution | RDD | 26 | 6 | 1.000274 | 9903278,9903424,etc |
| optical module | OM | 150 | 6 | 2.002755 | 9903342,9903341,etc |
| dwarf irregular | dI | 171 | 6 | 1.667394 | 9903017,9903442,etc |
| integrated sachs wolfe | ISW | 48 | 6 | 1.668012 | 9904235,9904108,etc |
| maximum likelihood | ML | 49 | 6 | 2.000447 | 9904375,9904294,etc |
| globular cluster luminosity function | GCLF | 112 | 6 | 1.667908 | 9904360,9904095,etc |
| narrow line seyfert 1 | NLS1 | 117 | 6 | 2.002383 | 9905202,9905323,etc |
| hopkins ultraviolet telescope | HUT | 86 | 6 | 1.335275 | 9905377,9905343,etc |
| rayleigh jeans | RJ | 16 | 6 | 1.000262 | 9905095,9905255,etc |
| medium energy concentrator spectrometer | MECS | 102 | 6 | 1.334062 | 9906162,9906209,etc |
| berkeley illinois maryland association | BIMA | 113 | 6 | 1.668732 | 9908301,9908121,etc |
| high magnification event | HME | 115 | 5 | 1.6026 | 9901341,9901336,etc |
| hubble deep field south | HDF-S | 22 | 5 | 1.001631 | 9901359,9901022,etc |
| blue compact dwarf | BCD | 145 | 5 | 2.002011 | 9904002,9904089,etc |
| soft gamma ray repeater | SGR | 267 | 5 | 1.608408 | 9904244,9904403,etc |
| monte carlo | MC | 38 | 5 | 1.600409 | 9905044,9905112,etc |
| san diego supercomputer center | SDSC | 5 | 5 | 1.000012 | 9906016,9906238,etc |
| ultra luminous infrared galaxy | ULIRG | 48 | 5 | 1.601496 | 9906493,9906332,etc |
| national center for supercomputing applications | NCSA | 6 | 5 | 1.000014 | 9906160,9906238,etc |
| three dimensional | 3D | 38 | 5 | 1.600809 | 9906490,9906491,etc |
| charge transfer efficiency | CTE | 28 | 5 | 1.000136 | 9906247,9906310,etc |
| damped ly absorber | DLA | 134 | 5 | 1.603781 | 9911146,9911462,etc |
| total variation diminishing | TVD | 9 | 4 | 1.000104 | 9901166,9901380,etc |
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