Revised NLTT Catalog: Salim & Gould

                 Improved Astrometry and Photometry for the 
New Luyten Catalogue of Stars With Proper Motions Larger than Two Tenths of an Arcsecond (NLTT)

 Description:
 The revised NLTT contains improved astrometry and new optical/infrared photometry 
  for the vast majority of NLTT stars lying in the overlap of regions covered by 
  POSS I and by the 2MASS release, approximately 44% of the sky; 
 The epoch 2000 positions are typically accurate to 130 mas, the proper motions to 
  5.5 mas/yr, and the V-J colors to 0.25 mag.; Internal binary proper motions are 
  measured to 3 mas/yr.;
 The false identification rate is ~1% for 11 < V < 18 and substantially 
  less at brighter magnitudes.

 File Summary:

  catalog.dat  -  Salim & Gould catalogue
  catalog.name -  SG NLTT catalog with LP names added
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     Explanations: catalog.dat
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 Description of catalog columns (see Salim & Gould, Paper II for details):
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 Summary Information
 1) NLTT number (1 to 58,845 - ordered by RA, equinox 1950, as in original catalogue)
 2) binary component
 3) RA (2000), epoch 2000 (deg)
 4) DEC (2000), epoch 2000 (deg)
 5) mu_RA (arcsec/yr)
 6) mu_DEC (arcsec/yr)
 7) sigma(mu_RA) (arcsec/yr)
 8) sigma(mu_DEC) (arcsec/yr)
 9) V mag
 10) V-J color
 11) 3-digit source-of-information code.
 NLTT data
 12) RA (2000), epoch 2000 (deg)
 13) DEC (2000), epoch 2000 (deg)
 14) mu_RA (arcsec/yr)
 15) mu_DEC (arcsec/yr)
 16) B_nltt (phot mag)
 17) R_nltt mag<tt>
 18) Hipparcos number (0 if not in Hipparcos).
 19) Identifier from TDSC, Tycho-2, or Starnet
 USNO data
 20) Integer RA (2000) (arcsec/100), epoch in 24)
 21) Integer DEC (2000) (South polar distance in arcsec/100), epoch in 24)
 22) B_usno mag
 23) R_usno mag
 24) USNO epoch (yr)
 25) 3-digit search-history code.
 2MASS data
 26) RA (2000) (deg), epoch in 31)
 27) DEC (2000) (deg), epoch in 31)
 28) J mag
 29) H mag
 30) K_s mag
 31) 2MASS epoch (yr)
 Binarity data
 31) binarity indicator
 32) NLTT number of binary companion
 33) NLTT estimated separation (")
 34) NLTT estimated position angle (deg)
 35) our estimated separation (")
 36) our estimated position angle (deg)
 37) subcatalog code
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 Fortran format statement:
 format(i5,a1,2f11.6,2f8.4,2f7.4,2f6.2,1x,3i1,2f10.5,2f8.4,2f5.1,i7,1x,a12,
 2i10,2f5.1,f9.3,i2,2i1,2f10.5,3f7.3,f9.3,i2,i6,f7.1,f6.1,f7.1,f6.1,i2)
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     Explanations: catalog.name
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 1) NLTT number
 2) RA (2000), epoch 2000 (deg)
 3) DEC (2000), epoch 2000 (deg)
 4) mu_RA (arcsec/yr)
 5) mu_DEC (arcsec/yr)
 6) sigma(mu_RA) (arcsec/yr)
 7) sigma(mu_DEC) (arcsec/yr)
 8) V mag
 9) V-J color
 10) m_pg, NLTT catalogue
 11) m_r, NLTT
 12) B (USNO)
 13) R (USNO)
 14) RA (2000), epoch (2000) (deg) - 2MASS
 15) DEC (2000), epoch 2000 (deg)
 16) J - 2MASS
 17) H - 2MASS
 18) K - 2MASS
 19) Name from NLTT
 20) 1950 position, from NLTT

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 Fortran format statement:
 format(i5,2f11.6,2f8.4,2f7.4,2f6.2,1x,2f5.1,2f6.1,2f11.6,3f7.3,1x,a12,1x,2a9)
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