Caution: we have insufficient knowledge about this database.

1. Title: Part of the IRAS Low Resolution Spectrometer Database

2. Sources:
   (a) Originator: unknown
   (b) Donor: John Stutz <STUTZ@pluto.arc.nasa.gov> 
       -- It's possible that one of John's colleagues actually provided
          this to UCI, perhaps Mike Marshall (MARSHALL%PLU@io.arc.nasa.gov)
   (c) Date: March 1988 (approximately)

3. Past Usage: unknown
   -- A NASA-Ames research group concerned with unsupervised learning tasks
      may have used this database during their empirical studies of their
      algorithm/system (AUTOCLASS II).  See the 1988 Machine Learning
      Conference Proceedings, 54-64, for a description of their algorithm.

4. Relevant Information: (from John Stutz)
       The data file contains a Commmon-Lisp loadable list of 531 high
    quality spectra from the IRAS Low Resolution Spectrometer.  Each
    spectra contains a 5 field header and fluxes from 44 blue band
    channels and 49 red band channels.  The channel fluxes are have been
    normalized to a mean value of 5000.  In our classification we use only
    normalized channel fluxes and the galatic latitude.

    The LRS-class values range from 0 - 99 with the 10's
    digit giving the basic class and the 1's digit giving the subclass.
    These classes were generated from spectral curve analysis.

5. Number of Instances: 531

6. Number of Attributes: 98 (including the 5-attribute "header")

7. Attribute Information: 
    1. LRS-name: (Suspected format: 5 digits, "+" or "-", 4 digits)
    2. LRS-class: integer
    3. ID-type: integer
    4. Right-Ascension: float
    5. Declination: float
    6-49: fluxes from the following 44 blue-band channel wavelengths: 
          (all given as floating point numerals)
     -- 6. 7.8636
     -- 7. 8.0485
     -- 8. 8.2286
     -- 9. 8.4043
     - 10. 8.5758
     - 11. 8.7436
     - 12. 8.9078
     - 13. 9.0686
     - 14. 9.2262
     - 15. 9.3809 
     - 16. 9.5328
     - 17. 9.6820
     - 18. 9.8286 
     - 19. 9.9728 
     - 20. 10.1148 
     - 21. 10.2545 
     - 22. 10.3922 
     - 23. 10.5279 
     - 24. 10.6616 
     - 25. 10.7935 
     - 26. 10.9237 
     - 27. 11.0521 
     - 28. 11.1790 
     - 29. 11.3042 
     - 30. 11.4280 
     - 31. 11.5503 
     - 32. 11.6711 
     - 33. 11.7907 
     - 34. 11.9089 
     - 35. 12.0258 
     - 36. 12.1415 
     - 37. 12.2560 
     - 38. 12.3693 
     - 39. 12.4816 
     - 40. 12.5927 
     - 41. 12.7028 
     - 42. 12.8118 
     - 43. 12.9199 
     - 44. 13.0269 
     - 45. 13.1330 
     - 46. 13.2382 
     - 47. 13.3425 
     - 48. 13.4459 
     - 49. 13.5485
    50-98: fluxes from the following 49 red-band channel wavelengths: 
           (all given as floating point numerals)
     - 50. 10.9929 
     - 51. 11.3704 
     - 52. 11.7357 
     - 53. 12.0899 
     - 54. 12.4339 
     - 55. 12.7687 
     - 56. 13.0948 
     - 57. 13.4131 
     - 58. 13.7239 
     - 59. 14.0278
     - 60. 14.3252 
     - 61. 14.6166 
     - 62. 14.9022 
     - 63. 15.1825 
     - 64. 15.4576 
     - 65. 15.7280 
     - 66. 15.9937 
     - 67. 16.2551 
     - 68. 16.5123 
     - 69. 16.7656
     - 70. 17.0151 
     - 71. 17.2610 
     - 72. 17.5034 
     - 73. 17.7425 
     - 74. 17.9784 
     - 75. 18.2113 
     - 76. 18.4412 
     - 77. 18.6682 
     - 78. 18.8925 
     - 79. 19.1142
     - 80. 19.3334 
     - 81. 19.5500 
     - 82. 19.7643 
     - 83. 19.9763 
     - 84. 20.1861 
     - 85. 20.3937 
     - 86. 20.5992 
     - 87. 20.8026 
     - 88. 21.0041 
     - 89. 21.2037
     - 90. 21.4014 
     - 91. 21.5973 
     - 92. 21.7914 
     - 93. 21.9838 
     - 94. 22.1745 
     - 95. 22.3636 
     - 96. 22.5511 
     - 97. 22.7371 
     - 98. 22.9216

8. Missing Attribute Values: not checked (none?)

9. Class Distribution: not checked