Revised NLTT Catalog *Improved Astrometry and Photometry for the New Luyten Catalogue of Stars With Proper Motions Larger than Two Tenths of an Arcsecond (NLTT)* The gzipped catalog is available here Description: 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 meaured to 3 mas/yr. The false identification rate is ~1% for 11 < V <18 and substantially less at brighter magnitudes. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- catalog.dat 269 36020 Revised NLTT Catalogue and 1st Supplement Description of catalog columns (see Paper II for details): -------------------------------------------------------------------------------- Summary Information 1) NLTT number (drawn consecutively from 1 to 58,845) 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 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 -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- Further description of the catalog is available from astro-ph/0207364 Acknowledgments. Please acknowledge the following papers: Paper I: Gould & Salim, 2002, accepted to ApJ, astro-ph/0204217 Paper II: Salim & Gould, 2002, submitted to ApJ, astro-ph/0206318 If you notice an incorrect identification, please send us an e-mail 2002 July 17