Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/~inr/sgnltt/nltt.readme Дата изменения: Fri Jun 8 23:32:59 2007 Дата индексирования: Tue Oct 2 05:32:32 2012 Кодировка: Поисковые слова: наблюдения метеорных потоков

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
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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