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- SIMPLE = T / Standard FITS format
- BITPIX = 8 / Character Information
- NAXIS = 0 / No image data array present
- EXTEND = T / Extension exists
- FILETYPE= 'SM_REG_X' / Indicates file type
- ORIGIN = 'ST ScI ' / Space Telescope Science Institute
- DATE = '01/06/89' / Date of issue (dd/mm/yy)
-
- COMMENT THE GUIDE STAR CATALOG
- COMMENT
- COMMENT An all-sky astrometric and photometric catalog
- COMMENT prepared for the operation of the Hubble Space
- COMMENT Telescope.
- COMMENT
- COMMENT Copyright, 1989, Association of Universities
- COMMENT for Research in Astronomy, Inc.
- COMMENT
- COMMENT This file contains data for one of the supporting tables for the Guide
- COMMENT Star Catalog (GSC). Additional information on the GSC may be found in
- COMMENT accompanying scientific publications as well as in comments and tables
- COMMENT elsewhere on this set of volumes.
- COMMENT
- COMMENT The Guide Star Catalog (GSC) was prepared by the Space Telescope Science
- COMMENT Institute (ST ScI), 3700 San Martin Drive, Baltimore, MD 21218, USA.
- COMMENT ST ScI is operated by the Association of Universities for Research in
- COMMENT Astronomy, Inc. (AURA), under contract with the National Aeronautics and
- COMMENT Space Administration (NASA).
- COMMENT
- COMMENT
- COMMENT File SM_REG_X
- COMMENT Index to the Small Regions
- COMMENT
- COMMENT The adopted catalog organization divides the sky into large regions,
- COMMENT approximately 7.5 deg in size, which are then subdivided into small
- COMMENT regions on the basis of their expected individual stellar populations;
- COMMENT each small region corresponds to one file of the GSC. Some details are
- COMMENT given in the comments to file REGIONS; and a full description, including
- COMMENT the region counting rules, may be found in Paper III.
- COMMENT
- COMMENT All information needed to associate a point on the sky with a region
- COMMENT file is given in file REGIONS. However, files LR_REG_X, which is an
- COMMENT index to the large regions, and SM_REG_X, which is an index to the small
- COMMENT regions, are provided to support a more rapid search algorithm based on
- COMMENT the geometric arrangement of the regions and their numbering conven-
- COMMENT tions.
- COMMENT
- COMMENT File LG_REG_X gives, for each declination band DEC_CTR, the number of
- COMMENT the first large region F_LG_REG in the band and the number of large
- COMMENT regions N_LG_REG therein. Similarly, file SM_REG_X gives, for each large
- COMMENT region LG_REG_N, the number F_SM_REG of the first small region and the
- COMMENT level of subdivision of the large region DEPTH. Then, for any
- COMMENT coordinate, two simple indexing procedures are sufficient to identify
- COMMENT the large region number and then, obtaining the level to which that
- COMMENT region is subdivided from the small region table, the small region
- COMMENT number which bears a one-to-one correspondence with the name of a GSC
- COMMENT file. One need also to note that the first large region in the southern
- COMMENT hemisphere is 367.
-
- END
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- XTENSION= 'TABLE ' / Table Extension
- BITPIX = 8 / Character Information
- NAXIS = 2 / Two-dimensional table
- NAXIS1 = 12 / Number of characters per line
- NAXIS2 = 732 / Number of rows
- PCOUNT = 0 / No Random Parameters
- GCOUNT = 1 / Only one group
- TFIELDS = 3 / Three fields per row
-
- EXTNAME = 'SM_REG_X' / Small Region Index File
- EXTVER = 1 / Integer Version Number
-
- TTYPE1 = 'LG_REG_N' / Number (ID) of the Large Region
- TBCOL1 = 1 / Start in column 1
- TFORM1 = 'I3 ' / Integer, 3 Character Field
-
- TTYPE2 = 'F_SM_REG' / Number (ID) of first Small Region in Lg. Reg.
- TBCOL2 = 5 / Start in column 5
- TFORM2 = 'I5 ' / Integer, 5 Character Field
-
- TTYPE3 = 'DEPTH ' / Depth of Subdivision of Large Region
- TBCOL3 = 12 / Start in column 12
- TFORM3 = 'I1 ' / Integer, 1 Character Field
-
- END
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-
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- 5 4 88 1071 4 89 1087 4 90 1103 4 91 1119 4 92 1135 4 93 1151 3 94
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- 3442 3275 3451 2276 3455 2277 3459 2278 3463 3279 3472 3280 3481 3
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- 601 7643 4602 7659 4603 7675 4604 7691 4605 7707 4606 7723 4607 773
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- 8 3688 8867 3689 8876 4690 8892 4691 8908 4692 8924 4693 8940 4694
- 8956 4695 8972 4696 8988 4697 9004 4698 9020 4699 9036 4700 9052 4
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