J/AJ/123/2822 Photometry of southern NLTT stars (Reid+, 2002)
Meeting the cool neighbors. II. Photometry of southern NLTT stars.
Reid I.N., Kilkenny D., Cruz K.L.
<Astron. J. 123, 2822 (2002)>
=2002AJ....123.2822R 2002AJ....123.2822R
ADC_Keywords: Stars, nearby ; Photometry, UBVRI ; Stars, distances
Keywords: Galaxy: stellar content - stars: red dwarfs
Abstract:
We present BVRI photometry of 180 bright, southern nearby-star
candidates. The stars were selected from the New Luyten Two-Tenths
proper-motion catalog (Cat. I/98) based on optical/infrared colors,
constructed by combining Luyten's mr estimates with near-infrared
photometry from the Two Micron All Sky Survey (Cat. <B/2mass>) .
Photometric parallaxes derived from V-Ks, V-I, and I-J colors,
combined with the limited available astrometry, show that as many as
108 stars may lie within 20pc of the Sun. Of these, 53 are new to
nearby-star catalogs, including three within 10pc of the Sun.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 109 180 Photometry and Astrometry of NLTT Stars
table3.dat 92 180 Distance Modulus Estimates for NLTT Stars
--------------------------------------------------------------------------------
See also:
B/2mass : The 2MASS database (IPAC/UMass, 2000)
I/98 : NLTT Catalogue (Luyten, 1979)
I/87 : LHS Catalogue, 2nd Edition (Luyten 1979)
V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)
J/AJ/123/2806 : Nearby stars in the NLTT catalogue (Reid+, 2002)
J/AJ/123/2828 : Spectroscopy of northern NLTT stars (Cruz+, 2002)
J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)
J/AJ/126/2449 : Nearby ultracool dwarfs in galactic plane (Reid+, 2003)
J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)
J/AJ/128/463 : A preliminary 20pc census from the NLTT cat. (Reid+, 2004)
J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+ 2005)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- NLTT Designation from the NLTT I/98 Catalogue (1)
14- 16 A3 --- f_NLTT [1234, ] Flag on NLTT (2)
18- 26 A9 --- AName Alternative name (3)
28- 31 I4 --- LHS ? Designation from Luyten's LHS catalog
33- 34 I2 h RAh Hour of Right Ascension from 2MASS (J2000)
36- 37 I2 min RAm Minute of Right Ascension from 2MASS (J2000)
39- 42 F4.1 s RAs Second of Right Ascension from 2MASS (J2000)
44 A1 --- DE- Sign of the Declination from 2MASS (J2000)
45- 46 I2 deg DEd Degree of Declination from 2MASS (J2000)
48- 49 I2 arcmin DEm Arcminute of Declination from 2MASS (J2000)
51- 52 I2 arcsec DEs Arcsecond of Declination from 2MASS (J2000)
54- 57 F4.1 mag rmag The NLTT r-band magnitude
59- 63 F5.2 mag Vmag The V-band magnitude
65- 68 F4.2 mag B-V ? The (B-V) color on the Johnson system
70- 73 F4.2 mag V-Rc ? The (V-Rc) color on the Cousins system
75- 78 F4.2 mag V-Ic ? The (V-Ic) color on the Cousins system
80 I1 --- Nobs ? Number of optical observations
82- 87 F6.3 mag Jmag The 2MASS J-band magnitude
89- 93 F5.3 mag Hmag ? The 2MASS H-band magnitude
95- 99 F5.3 mag Kmag The 2MASS KS band magnitude
101-103 I3 mas plx ? Trigonometric parallax
105-106 I2 mas e_plx ? Uncertainty in plx
108 A1 --- r_plx Source of the astrometry (4)
--------------------------------------------------------------------------------
Note (1): We have added Lowell Observatory identifications
(Giclas et al., 1971, Cat. I/79)
R = Ross catalog
W = Wolf catalog
Note (2): Flag on NLTT:
1 = (B-V) too blue for VRIJHK, possibly due to contamination;
2 = possible variable;
3 = Joint optical photometry for known binary:
Ross 948/LP 735-11 - Rmag(A)=11.0, Rmag(B)=11.3, Δ=4"
LP 793-24/25 - Rmag(A)=11.9, Rmag(B)=12.2, Δ=4.5"
LP 675-76/77 - Rmag(A)=12.7, Rmag(B)=13.0, Δ=8"
LP 726-11/12 - Rmag(A)=12.7, Rmag(B)=13.6, Δ=8"
4 = Two stars in aperture for optical photometry; in most cases, the
second star is too faint to affect the VRI data.
Note (3): Usually from the preliminary version of the Third Catalogue
of Nearby Stars (Jahreis & Gliese, 1991, Cat. V/70)
Note (4): Source of the astrometry:
1 = Hipparcos (ESA 1997, Cat. I/239)
2 = pCNS3; Jahreis & Gliese, 1991, Cat. V/70)
3 = USNO (Monet et al., 1992, Cat. J/AJ/103/638;
Harrington et al., 1993, Cat. J/AJ/105/1571)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- NLTT The designation from the NLTT Catalogue (1)
13 I1 --- f_NLTT [1]? Flag on NLTT (2)
15- 19 F5.2 mag DM(V-Ks) Distance modulus derived from (V-Ks)
photometric parallax
21- 24 F4.2 mag e_DM(V-Ks) Uncertainty in DM(V-Ks)
26- 30 F5.2 mag DM(V-Ic) ? Distance modulus derived from (V-Ic)
photometric parallax
32- 35 F4.2 mag e_DM(V-Ic) ? Uncertainty in DM(V-Ic)
37- 41 F5.2 mag DM(Ic-J) ? Distance modulus derived from (Ic-J)
photometric parallax
43- 46 F4.2 mag e_DM(Ic-J) ? Uncertainty in DM(Ic-J)
48- 52 F5.2 mag DM Weighted photometric parallax average
54- 57 F4.2 mag e_DM Uncertainty in DM
59- 63 F5.2 mag DMplx ? Distance modulus from trigonometric parallax
65- 68 F4.2 mag e_DMplx ? Uncertainty in DMplx
70- 73 F4.1 pc Dist Final weighted average distance (3)
75- 77 F3.1 pc e_Dist Uncertainty in Dist
79- 82 F4.2 mag KsMAG Absolute Ks band magnitude
84- 88 F5.2 mag VMag Absolute V band magnitude
90- 91 A2 --- f_Dist Distance limit code (4)
--------------------------------------------------------------------------------
Note (1): Adding Lowell Observatory identifications.
Note (2): Flag on NLTT:
1: Binary stars where we have joint photometry for both components.
We have used the NLTT magnitudes to estimate the relative
contribution, and the distance and absolute magnitudes are based
on the estimated optical/near-infrared colors of the primary.
Note (3): Based on a weighted average of the photometric average and the
trigonometric result.
Note (4): Distance limit code:
Y: star lies within our distance limit of 20pc;
?: within 1σ of the boundary;
N: beyond the limit;
+: indicates that the star is not included in the preliminary version
of the Third Catalogue of Nearby Stars
(Jahreis & Gliese, 1991NSC3..C......0G 1991NSC3..C......0G, Cat. V/70).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
* 05-May-2003: Corrected in table1 the declination sign for
G 75-55 and LP 616- 56 (missing minus)
LP 595- 23 (declination is positive)
References:
Reid & Cruz, Paper I, 2002AJ....123.2806R 2002AJ....123.2806R, Cat. J/AJ/123/2806
Cruz & Reid, Paper III, 2002AJ....123.2828C 2002AJ....123.2828C, Cat. J/AJ/123/2828
Reid et al., Paper IV, 2003AJ....125..354R 2003AJ....125..354R
Cruz et al., Paper V, 2003AJ....126.2421C 2003AJ....126.2421C, Cat. J/AJ/126/2421
Reid, Paper VI, 2003AJ....126.2449R 2003AJ....126.2449R, Cat. J/AJ/126/2449
Reid et al., Paper VII, 2003AJ....126.3007R 2003AJ....126.3007R, Cat. J/AJ/126/3007
Reid et al., Paper VIII, 2004AJ....128..463R 2004AJ....128..463R, Cat. J/AJ/128/463
Cruz et al., Paper IX, 2007AJ....133..439C 2007AJ....133..439C, Cat. J/AJ/133/439
Reid et al., Paper X, 2008AJ....136.1290R 2008AJ....136.1290R, Cat. J/AJ/136/1290
Reid et al., Paper XI, 2007AJ....133.2825R 2007AJ....133.2825R, Cat. J/AJ/133/2825
Cruz et al., Paper XII, 2018AJ....155...34C 2018AJ....155...34C
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 21-Jun-2002