Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.simfov.ru/catalogs/nltt/rev_nltt.txt Дата изменения: Thu Jun 15 12:14:00 2006 Дата индексирования: Mon Oct 1 19:34:57 2012 Кодировка: Поисковые слова: virgo cluster

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:
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FileName Lrecl Records Explanations
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catalog.dat 269 36020 Revised NLTT Catalogue and 1st Supplement



Description of catalog columns (see Paper II for details):
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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

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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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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