J/ApJS/150/455 New HIP-based parallaxes for 424 faint stars (Gould+, 2004)
New HIPPARCOS-based parallaxes for 424 faint stars.
Gould A., Chaname J.
<Astrophys. J. Suppl. Ser., 150, 455-464 (2004)>
=2004ApJS..150..455G 2004ApJS..150..455G
ADC_Keywords: Stars, faint ; Parallaxes, trigonometric ; Proper motions ;
Magnitudes, absolute
Keywords: astrometry - catalogs - stars: fundamental parameters -
stars: late-type - white dwarfs
Abstract:
We present a catalog of 424 common proper-motion companions to
Hipparcos stars with good (>3σ) parallaxes, thereby effectively
providing new parallaxes for these companions. Compared with typical
stars in the Hipparcos catalog, these stars are substantially dimmer.
The catalog includes 20 white dwarfs and an additional 29 stars with
MV>14, the great majority of the latter being M dwarfs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 157 424 New parallaxes for Hipparcos Companions
table2.dat 85 84 Hipparcos doubles
table3.dat 104 20 White Dwarf Companions to Hipparcos Stars
table4.dat 105 29 MV>14 Companions to Hipparcos Stars
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/98 : NLTT Catalogue (Luyten, 1979)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- NLTT Companion NLTT (I/98) number
7- 15 F9.5 deg RAdeg Companion right Ascension in decimal degrees
(J2000, Ep=J2000) (G1)
17- 25 F9.5 deg DEdeg Companion declination in decimal degrees
(J2000, Ep=J2000) (G1)
27- 31 I5 mas/yr pmRA Companion east proper-motion component
33- 37 I5 mas/yr pmDE Companion north proper-motion component
39- 43 F5.2 mag Vmag Companion V band magnitude
45- 49 F5.2 mag (V-J) ?=-9.00 Companion (V-J) color index
51- 55 F5.2 mag VMAG Companion absolute V band magnitude
57- 59 I3 --- Code Companion source code (2)
61- 65 I5 --- NLTT1 Primary NLTT (I/98) number
67- 75 F9.5 deg RA1deg Primary Right Ascension in decimal
degrees (2000) (G1)
77- 85 F9.5 deg DE1deg Primary Declination in decimal
degrees (J2000) (G1)
87- 91 I5 mas/yr pmRA1 Primary East proper-motion component
93- 97 I5 mas/yr pmDE1 Primary North proper-motion component
99-103 F5.2 mag Vmag1 Primary V band magnitude
105-109 F5.2 mag (V-J)1 ?=-9.00 Primary (V-J) color index
111-115 F5.2 mag VMAG1 Primary absolute V band magnitude
117-119 I3 --- Code1 Primary source code (2)
121-125 F5.1 arcsec Sep Separation of the companion with respect
to the primary
127-131 F5.1 deg PA Position angle of the companion with respect
to the primary, north through east
133-138 I6 --- HIP1 Primary Hipparcos (I/239) number
140-145 F6.2 mas plx1 Primary Hipparcos parallax
147-151 F5.2 mas e_plx1 Error in plx
153-155 I3 --- Dpm Adopted proper-motion difference
157 I1 --- Bin [0/1] Binarity flag (3)
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Note (2): The three-digit source code is an expanded version of the source
code used in rNLTT, Cat. J/ApJ/582/1011. There, the three digits
refer to the sources of the position, proper motion, and V photometry.
1 = Hipparcos, Cat. I/239
2 = Tycho-2, Cat. I/259
3 = TDSC, Cat. I/276
4 = Starnet, Cat. I/253
5 = USNO/2MASS, Cat. II/246
6 = NLTT, Cat. I/98
7 = USNO-A, Cat. I/252, (for position) or common proper motion
companion (for proper motion).
8 = USNO-B, Cat. I/284 (position and proper motion)
9 = no actual detection in any catalog (position is inferred from
the separation vector given in the NLTT Notes)
More specifically, "555" means 2MASS based position, USNO-A based V
photometry, and USNO/2MASS based proper motion. The "8" and "9" notes
are an addition to the rNLTT codes. USNO-A photometry and NLTT
photometry are transformed to V photometry using the prescriptions
of Salim & Gould (2003, Cat. J/ApJ/582/1011).
Note (3): Binary flag:
0 = binary certain
1 = binary "somewhat uncertain"
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP1 Brighter component Hipparcos (I/239) number
8- 12 I5 --- NLTT1 Brighter component rNLTT (J/ApJ/582/1011)
number
14- 19 F6.2 mas plx1 Brighter component parallax
21- 25 F5.2 mas e_plx1 Error in plx1
27- 31 F5.2 mag Vmag1 Brighter component V band magnitude
33- 36 F4.2 mag (V-J)1 Brighter component (V-J) color
38- 43 I6 --- HIP2 Fainter component Hipparcos number
45- 49 I5 --- NLTT2 Fainter component rNLTT number
51- 56 F6.2 mas plx2 Fainter component parallax
58- 62 F5.2 mas e_plx2 Error in plx2
64- 68 F5.2 mag Vmag2 Fainter component V band magnitude
70- 73 F4.2 mag (V-J)2 Fainter component (V-J) color
75- 79 F5.1 arcsec Sep Separation between fainter and brighter
components
81- 85 F5.1 deg PA Position angle between fainter and brighter
components
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- NLTT Companion NLTT (I/98) number
7- 15 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000) (G1)
17- 25 F9.5 deg DEdeg Declination in decimal degrees (J2000) (G1)
27- 31 F5.2 mag Vmag V band magnitude
33- 37 F5.2 mag V-J ?=-9.00 (V-J) color index
39- 43 F5.2 mag VMAG Absolute V band magnitude
45- 49 F5.1 arcsec Sep Separation relative to the primary star
51- 55 F5.1 deg PA Position angle relative to the primary star,
north through east
57- 62 I6 --- HIP1 Primary Hipparcos (I/239) number
64- 69 F6.2 mas plx1 Hipparcos parallax of the primary
71- 74 F4.2 mas e_plx1 Error in plx
76- 81 F6.2 mas plxOld ? Previously tabulated parallax of the companion
83- 87 F5.2 mas e_plxOld ? Error in plxOld
89- 98 A10 --- Name Name of the companion
100-105 A6 --- SpType Spectral type of the companion
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Global notes:
Note (G1): 2000 epoch and equinox.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004